Pub Date : 2026-01-01Epub Date: 2025-10-22DOI: 10.1016/j.jorganchem.2025.123906
Eman R. Elsharkawy , Rasha Jame , Ateyatallah Aljuhani , Moustafa A. Gouda
1,3-Oxaselenoles are a class of five-membered heterocyclic compounds containing oxygen and selenium atoms in the 1 and 3 positions, respectively, and have garnered attention in organic chemistry due to their unique reactivity and potential applications. The synthesis of 1,3-oxaselenolanes, along with related compounds like 1,3-oxaselenoles and benzo[d][1,3]oxaselenoles, can be accomplished using various methods. These include (i) cycloselenization of 2-selanyl-1-ethanol or selenoacetic acid with various aldehydes, (ii) cycloselenization of isoselenocyanates or isocyanates with various substrates, (iii) reaction of gem‑dicyano epoxides with KSeCN, (iv) reaction of 1,3-diketone with SeO2, (v) reaction of selenoamide with α-haloketones, (vi) Viehe's salt with o-bromophenols among other techniques.
{"title":"Recent advances in the chemistry of 1,3-oxaselenolanes, 1,3-oxaselenoles, benzo[d][1,3]oxaselenoles and their analogues","authors":"Eman R. Elsharkawy , Rasha Jame , Ateyatallah Aljuhani , Moustafa A. Gouda","doi":"10.1016/j.jorganchem.2025.123906","DOIUrl":"10.1016/j.jorganchem.2025.123906","url":null,"abstract":"<div><div>1,3-Oxaselenoles are a class of five-membered heterocyclic compounds containing oxygen and selenium atoms in the 1 and 3 positions, respectively, and have garnered attention in organic chemistry due to their unique reactivity and potential applications. The synthesis of 1,3-oxaselenolanes, along with related compounds like 1,3-oxaselenoles and benzo[d][1,3]oxaselenoles, can be accomplished using various methods. These include (i) cycloselenization of 2-selanyl-1-ethanol or selenoacetic acid with various aldehydes, (ii) cycloselenization of isoselenocyanates or isocyanates with various substrates, (iii) reaction of gem‑dicyano epoxides with KSeCN, (iv) reaction of 1,3-diketone with SeO<sub>2</sub>, (v) reaction of selenoamide with α-haloketones, (vi) Viehe's salt with <em>o</em>-bromophenols among other techniques.</div></div>","PeriodicalId":374,"journal":{"name":"Journal of Organometallic Chemistry","volume":"1043 ","pages":"Article 123906"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145414704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2025-10-22DOI: 10.1016/j.jorganchem.2025.123910
Mengyao Zhang , Yan Wang , Shengyu Dai
A series of ortho-aryl-halogenated (F, Cl, Br) iminopyridyl Ni(II) and Pd(II) complexes were synthesized and evaluated in ethylene (co)oligomerization. The nickel catalysts exhibited high activity (up to 7.62 × 10⁶ g/(mol·h)) in ethylene oligomerization, producing low-molecular-weight (337–589 g/mol), highly branched (88–122 branches/1000C) oligomers. Larger halogen substituents enhanced activity, increased molecular weight, and reduced branching density, suggesting suppressed chain transfer via steric and electronic modulation. The palladium catalysts showed moderate activity (0.8–7.23 × 10⁴ g/(mol·h)), generating hyperbranched oligomers (124–151 branches/1000C) with temperature-dependent molecular weights (260–684 g/mol). In ethylene–methyl acrylate (MA) co-oligomerization, Pd catalysts achieved high MA incorporation (5–21 mol%) while maintaining low molecular weights (263–344 g/mol) and high branching densities (144–165 branches/1000C). Notably, larger halogens improved co-oligomerization activity but reduced MA insertion, likely due to steric hindrance. These findings highlight the dual role of ortho-aryl halogens in tuning catalytic performance through electronic and steric effects, offering a strategy for designing tailored ethylene oligomer architectures.
{"title":"The role of ortho-aryl halogen effects in iminopyridyl Ni(II) and Pd(II) catalysts for ethylene (co)oligomerization","authors":"Mengyao Zhang , Yan Wang , Shengyu Dai","doi":"10.1016/j.jorganchem.2025.123910","DOIUrl":"10.1016/j.jorganchem.2025.123910","url":null,"abstract":"<div><div>A series of ortho-aryl-halogenated (F, Cl, Br) iminopyridyl Ni(II) and Pd(II) complexes were synthesized and evaluated in ethylene (co)oligomerization. The nickel catalysts exhibited high activity (up to 7.62 × 10⁶ g/(mol·h)) in ethylene oligomerization, producing low-molecular-weight (337–589 g/mol), highly branched (88–122 branches/1000C) oligomers. Larger halogen substituents enhanced activity, increased molecular weight, and reduced branching density, suggesting suppressed chain transfer via steric and electronic modulation. The palladium catalysts showed moderate activity (0.8–7.23 × 10⁴ g/(mol·h)), generating hyperbranched oligomers (124–151 branches/1000C) with temperature-dependent molecular weights (260–684 g/mol). In ethylene–methyl acrylate (MA) co-oligomerization, Pd catalysts achieved high MA incorporation (5–21 mol%) while maintaining low molecular weights (263–344 g/mol) and high branching densities (144–165 branches/1000C). Notably, larger halogens improved co-oligomerization activity but reduced MA insertion, likely due to steric hindrance. These findings highlight the dual role of ortho-aryl halogens in tuning catalytic performance through electronic and steric effects, offering a strategy for designing tailored ethylene oligomer architectures.</div></div>","PeriodicalId":374,"journal":{"name":"Journal of Organometallic Chemistry","volume":"1043 ","pages":"Article 123910"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145414739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2025-11-01DOI: 10.1016/j.jorganchem.2025.123929
Ali M Hussein , Narinderjit Singh Sawaran Singh , Luma Hussain Saleh , Malatesh Akkur , Satish Kumar Samal , Sridharan Sundharam , Sanjeev Kumar , Khalmurat Iliev , Zukhra Atamuratova , Davronbek Yulchiev , Aseel Smerat , H. Amin El Sabban
In this investigation, we used the fruit of Lycium barbarum to develop a natural method for generation of silver nanoparticles (Ag NPs/L. barbarum). The fruit of Lycium barbarum were applied as a green capping, reducing and a stabilizer material to make silver nanoparticles in this process. The produced Ag NPs/L. barbarum has been characterized different techniques like UV–Vis, TEM, FE-SEM, EDX, elemental mapping, and ICP-OES. Further, the catalytic efficiency of this composite has been evaluated in the producing pyrimido[1,2-b]indazole compounds via A3 coupling reaction that involved mixing aryl aldehydes, phenylacetylene and 3-aminoindazoles without using solvent, and it got good yields. After finishing the reaction, the Ag NPs/L. barbarum catalyst could be easily recovered and used again for 7 runs without significant decrease in its efficiency.
在这项研究中，我们利用枸杞的果实，开发了一种自然生成银纳米粒子（Ag NPs/L）的方法。barbarum)。采用枸杞果作为绿色封盖剂、还原剂和稳定剂制备纳米银。产生的Ag NPs/L。利用UV-Vis， TEM, FE-SEM， EDX，元素映射和ICP-OES等技术对barbarum进行了表征。在不使用溶剂的情况下，通过芳醛、苯乙炔和3-氨基茚唑的A3偶联反应，评价了该复合材料的催化效率，并取得了良好的产率。反应结束后，Ag NPs/L。Barbarum催化剂可以很容易地回收，重复使用7次，效率没有明显下降。
{"title":"Phytofabricated of silver nanoparticles (Ag NPs) medated by Lycium barbarum fruit extract: An heteregenous catalyst for solvent-free synthesis of pyrimido[1,2-b]indazoles","authors":"Ali M Hussein , Narinderjit Singh Sawaran Singh , Luma Hussain Saleh , Malatesh Akkur , Satish Kumar Samal , Sridharan Sundharam , Sanjeev Kumar , Khalmurat Iliev , Zukhra Atamuratova , Davronbek Yulchiev , Aseel Smerat , H. Amin El Sabban","doi":"10.1016/j.jorganchem.2025.123929","DOIUrl":"10.1016/j.jorganchem.2025.123929","url":null,"abstract":"<div><div>In this investigation, we used the fruit of <em>Lycium barbarum</em> to develop a natural method for generation of silver nanoparticles (Ag NPs/L. <em>barbarum</em>). The fruit of <em>Lycium barbarum</em> were applied as a green capping, reducing and a stabilizer material to make silver nanoparticles in this process. The produced Ag NPs/L. <em>barbarum</em> has been characterized different techniques like UV–Vis, TEM, FE-SEM, EDX, elemental mapping, and ICP-OES. Further, the catalytic efficiency of this composite has been evaluated in the producing pyrimido[1,2-b]indazole compounds via A<sup>3</sup> coupling reaction that involved mixing aryl aldehydes, phenylacetylene and 3-aminoindazoles without using solvent, and it got good yields. After finishing the reaction, the Ag NPs/L. <em>barbarum</em> catalyst could be easily recovered and used again for 7 runs without significant decrease in its efficiency.</div></div>","PeriodicalId":374,"journal":{"name":"Journal of Organometallic Chemistry","volume":"1043 ","pages":"Article 123929"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145464340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2025-10-10DOI: 10.1016/j.jorganchem.2025.123889
Simon Stifel, Wolfgang R.E. Büchele, Leon F. Richter, Christian Jandl, Fritz E. Kühn
The synthesis and characterization of group 10 (NiII, PdII, PtII) and group 11 (CuI, AgI, AuI, AuIII) N–heterocyclic carbene (NHC) complexes supported by a methyl–substituted macrocyclic ligand is reported. NMR, ESI–MS, elemental analysis, and single–crystal X–ray diffraction (SC–XRD) confirm their structure. The d8 metals adopt square–planar geometries, with M–C bond lengths increasing from Ni to Pt and reduced backbone distortion. The d10 series forms tetranuclear Cu4L2, Ag4L2, and Au4L2 species featuring cuprophilic, argentophilic, and aurophilic interactions stabilized by the rigid macrocyclic scaffold. Comparative analysis reveals that methyl substitution enhances σ–donor character at the carbene center, promoting close metal–metal contacts. Hirshfeld surface and void analyses further confirm that crystal packing is dominated by H⋯H and C–H⋯F contacts, with minimal π–π stacking or intermolecular metallophilic interactions, and that packing efficiency varies from nearly space–filling (Ni3-OTf, Pd3-OTf, Pt3-OTf) to more open frameworks (Ag4(3)2-PF6, Au4(3)2-PF6). These structural and electronic insights underline the potential of macrocyclic NHCs for future applications.
{"title":"Elucidation of coordination geometries and intermetallic interactions in electronically modified NHC complexes of group 10 and 11","authors":"Simon Stifel, Wolfgang R.E. Büchele, Leon F. Richter, Christian Jandl, Fritz E. Kühn","doi":"10.1016/j.jorganchem.2025.123889","DOIUrl":"10.1016/j.jorganchem.2025.123889","url":null,"abstract":"<div><div>The synthesis and characterization of group 10 (Ni<sup>II</sup>, Pd<sup>II</sup>, Pt<sup>II</sup>) and group 11 (Cu<sup>I</sup>, Ag<sup>I</sup>, Au<sup>I</sup>, Au<sup>III</sup>) <em>N</em>–heterocyclic carbene (NHC) complexes supported by a methyl–substituted macrocyclic ligand is reported. NMR, ESI–MS, elemental analysis, and single–crystal X–ray diffraction (SC–XRD) confirm their structure. The <em>d</em><sup>8</sup> metals adopt square–planar geometries, with M–C bond lengths increasing from Ni to Pt and reduced backbone distortion. The <em>d</em><sup>10</sup> series forms tetranuclear Cu<sub>4</sub>L<sub>2</sub>, Ag<sub>4</sub>L<sub>2</sub>, and Au<sub>4</sub>L<sub>2</sub> species featuring cuprophilic, argentophilic, and aurophilic interactions stabilized by the rigid macrocyclic scaffold. Comparative analysis reveals that methyl substitution enhances <em>σ</em>–donor character at the carbene center, promoting close metal–metal contacts. Hirshfeld surface and void analyses further confirm that crystal packing is dominated by H⋯H and C–H⋯F contacts, with minimal <em>π–π</em> stacking or intermolecular metallophilic interactions, and that packing efficiency varies from nearly space–filling (<strong>Ni3-OTf, Pd3-OTf, Pt3-OTf</strong>) to more open frameworks (<strong>Ag<sub>4</sub>(3)<sub>2</sub>-PF<sub>6</sub>, Au<sub>4</sub>(3)<sub>2</sub>-PF<sub>6</sub></strong>). These structural and electronic insights underline the potential of macrocyclic NHCs for future applications.</div></div>","PeriodicalId":374,"journal":{"name":"Journal of Organometallic Chemistry","volume":"1043 ","pages":"Article 123889"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145361306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2025-10-14DOI: 10.1016/j.jorganchem.2025.123897
J.W. Faller, Nikos Sarantopoulos, Jonathan Parr
The ions [(η6-cymene)Ru(μ-Cl)3]− and [L2(X)Ru(μ-Cl)3]1-/2− are direct analogs of the Kläui ligands and we have used these ligands as components in preparing ruthenium dimers, including (η6-cymene)Ru(μ-Cl)3Ru(BIPHEP)Cl. The conformations of the BIPHEP ligands in [NH2Et2][{RuCl(BIPHEP)}2(μ-Cl)3], however, have the potential of producing either homochiral (R,R) or (S,S) dimers or the (R,S) heterodimer. The crystal structure of this BIPHEP ruthenium complex shows a racemic mixture of (R,R) and (S,S) dimers, suggesting that the chirality in one half of the dimer strongly influences the stability of the chirality in the other half.
{"title":"Homochirality and chiral recognition in ruthenium complexes of the type [NH2Et2][{RuCl(P-P)}2(μ-Cl)3] where P-P = bidentate phosphine","authors":"J.W. Faller, Nikos Sarantopoulos, Jonathan Parr","doi":"10.1016/j.jorganchem.2025.123897","DOIUrl":"10.1016/j.jorganchem.2025.123897","url":null,"abstract":"<div><div>The ions [(η<sup>6</sup>-cymene)Ru(μ-Cl)<sub>3</sub>]<sup>−</sup> and [L<sub>2</sub>(X)Ru(μ-Cl)<sub>3</sub>]<sup>1-/2−</sup> are direct analogs of the Kläui ligands and we have used these ligands as components in preparing ruthenium dimers, including (η<sup>6</sup>-cymene)Ru(μ-Cl)<sub>3</sub>Ru(BIPHEP)Cl. The conformations of the BIPHEP ligands in [NH<sub>2</sub>Et<sub>2</sub>][{RuCl(BIPHEP)}<sub>2</sub>(μ-Cl)<sub>3</sub>], however, have the potential of producing either homochiral (<em>R,R</em>) or (<em>S,S</em>) dimers or the (<em>R,S</em>) heterodimer. The crystal structure of this BIPHEP ruthenium complex shows a racemic mixture of (<em>R,R</em>) and (<em>S,S</em>) dimers, suggesting that the chirality in one half of the dimer strongly influences the stability of the chirality in the other half.</div></div>","PeriodicalId":374,"journal":{"name":"Journal of Organometallic Chemistry","volume":"1043 ","pages":"Article 123897"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145361308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A novel ferrocene-triazole-BODIPY conjugate (Fc-Tz-BDP) and its non-ferrocenyl analogue (Ph-Tz-BDP) were designed and synthesized via the copper(I)-catalyzed azide-alkyne cycloaddition reaction. The newly synthesized conjugates were characterized using 1H NMR, 13C NMR, 11B NMR, 19F NMR, FT-IR, and mass spectral analysis. A detailed investigation into their photophysical, electrochemical, and theoretical properties was conducted to elucidate the electronic interactions between the ferrocene and BODIPY moieties. Photophysical studies revealed that the ferrocene unit acts as a quencher of the BODIPY fluorescence, with the quantum yield being more than four times lower than that of the reference Ph-Tz-BDP due to an efficient PET mechanism. Cyclic voltammetry experiments confirmed that the HOMO is localized on the electron-donating ferrocene unit, while the LUMO resides on the BODIPY core, providing the driving force for PET. These experimental results were supported by DFT and TD-DFT calculations.
{"title":"Photophysical and electrochemical behaviour of ferrocene–triazole–BODIPY conjugate: Experimental and theoretical investigations","authors":"Supriya Routray , Laxmipriya Nayak , Subhadeep Acharya , Simran Pattnaik , Saiprakash Rout , Sikha Sayantani , Rashmirekha Satapathy","doi":"10.1016/j.jorganchem.2025.123923","DOIUrl":"10.1016/j.jorganchem.2025.123923","url":null,"abstract":"<div><div>A novel ferrocene-triazole-BODIPY conjugate <strong>(Fc-Tz-BDP)</strong> and its non-ferrocenyl analogue <strong>(Ph-Tz-BDP)</strong> were designed and synthesized via the copper(I)-catalyzed azide-alkyne cycloaddition reaction. The newly synthesized conjugates were characterized using <sup>1</sup>H NMR, <sup>13</sup>C NMR, <sup>11</sup>B NMR, <sup>19</sup>F NMR, FT-IR, and mass spectral analysis. A detailed investigation into their photophysical, electrochemical, and theoretical properties was conducted to elucidate the electronic interactions between the ferrocene and BODIPY moieties. Photophysical studies revealed that the ferrocene unit acts as a quencher of the BODIPY fluorescence, with the quantum yield being more than four times lower than that of the reference <strong>Ph-Tz-BDP</strong> due to an efficient PET mechanism. Cyclic voltammetry experiments confirmed that the HOMO is localized on the electron-donating ferrocene unit, while the LUMO resides on the BODIPY core, providing the driving force for PET. These experimental results were supported by DFT and TD-DFT calculations.</div></div>","PeriodicalId":374,"journal":{"name":"Journal of Organometallic Chemistry","volume":"1043 ","pages":"Article 123923"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145414783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2025-10-21DOI: 10.1016/j.jorganchem.2025.123905
Jayapratha Gunasekaran , Pradeep Muthurathinam , Kavinraj Venkatachalam , Narmatha Venkatesan , Rajashri Varadarasu , Luis G. Alves , Ana M. Martins , Shanmuga Bharathi Kuppannan
A new class of half-sandwich ruthenium(II)-p-cymene complexes supported by η6-arene and (N, O) heterocyclic thiophene-based Schiff base hydrazone ligands has been synthesized and characterized by FT-IR, UV–Visible spectrophotometry, NMR, ESI-MS spectrometry and single-crystal X-ray diffraction techniques. All the ruthenium(II) complexes were tested as catalysts for the transfer hydrogenation of ketones to secondary alcohols. The reaction conditions were optimized, the complex C3 [Ru(η6-p-cymene)(Cl)(L3)](L3 = N’-((1H-indol-2-yl)methylene)thiophene-2-carbohydrazide) showed better catalytic activity than the others. The conditions for the catalytic reactions were optimized with 0.2 mol% of complex, C3 in 5 ml of isopropanol and KOH at room temperature. This catalytic transfer hydrogenation of ketones proceeds through four major steps i.e., β-elimination, nucleophilic attack, hydride insertion and proton transfer. In addition, with this reaction condition our catalyst possesses a wide range of substrate tolerance viz., substrates of aryls with electron withdrawing/ electron donating/bifunctional groups, diaryls and aliphatic ketones. We have also compared the efficiency of our catalytic system against the existed ones and discussed.
{"title":"Transfer hydrogenation of ketones to secondary alcohols catalyzed by new Ruthenium(II) Heterocyclic hydrazone complexes","authors":"Jayapratha Gunasekaran , Pradeep Muthurathinam , Kavinraj Venkatachalam , Narmatha Venkatesan , Rajashri Varadarasu , Luis G. Alves , Ana M. Martins , Shanmuga Bharathi Kuppannan","doi":"10.1016/j.jorganchem.2025.123905","DOIUrl":"10.1016/j.jorganchem.2025.123905","url":null,"abstract":"<div><div>A new class of half-sandwich ruthenium(II)-<em>p</em>-cymene complexes supported by η<sup>6</sup>-arene and (N, O) heterocyclic thiophene-based Schiff base hydrazone ligands has been synthesized and characterized by FT-IR, UV–Visible spectrophotometry, NMR, ESI-MS spectrometry and single-crystal X-ray diffraction techniques. All the ruthenium(II) complexes were tested as catalysts for the transfer hydrogenation of ketones to secondary alcohols. The reaction conditions were optimized, the complex C<sup>3</sup> [Ru(η<sup>6</sup>-<em>p</em>-cymene)(Cl)(L<sup>3</sup>)](L<sup>3</sup> = N’-((1<em>H</em>-indol-2-yl)methylene)thiophene-2-carbohydrazide) showed better catalytic activity than the others. The conditions for the catalytic reactions were optimized with 0.2 mol% of complex, <strong>C<sup>3</sup></strong> in 5 ml of isopropanol and KOH at room temperature. This catalytic transfer hydrogenation of ketones proceeds through four major steps i.e., β-elimination, nucleophilic attack, hydride insertion and proton transfer. In addition, with this reaction condition our catalyst possesses a wide range of substrate tolerance viz., substrates of aryls with electron withdrawing/ electron donating/bifunctional groups, diaryls and aliphatic ketones. We have also compared the efficiency of our catalytic system against the existed ones and discussed.</div></div>","PeriodicalId":374,"journal":{"name":"Journal of Organometallic Chemistry","volume":"1043 ","pages":"Article 123905"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145414738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2025-11-08DOI: 10.1016/j.jorganchem.2025.123938
Narinderjit Singh Sawaran Singh , Waqid Al-Mussawi , P. Jangir , Muktha Eti , Tanmoy Prida , S. Radhika , Gaganjot Kaur , Erkaboy Davletov , Usmonjon Akhmedov , Alisher Abduvokhidov , M.A. Diab , Heba A. El-Sabban
In this inclusive innovation study, we developed a new green way to create bio-decorated palladium nanoparticles using an extract from orange leaves over the magnetic Fe3O4 NPs to make a novel nanocatalyst. The orange leaf extract served as a green reducing agent and was great at keeping the stability of the nanoparticles we generated. Then, the produced Fe3O4/Pd NPs was carefully studied with different tests like FE-SEM, TEM, EDX, XRD, ICP-OES, and VSM. The desired Fe3O4/Pd NPs showed impressive activity for N-arylation of indole with iodo-arenes through a reaction called Ullmann-type C-N coupling. Different aryl halides were converted to N-arylated indoles with good results for aryl iodides and moderate yields for aryl bromides. Additionally, the Fe3O4/Pd NPs could be recovered and reused for 6 times with maintaining their effectiveness.
{"title":"Bio-inspired synthesis of a recyclable magnetic palladium nanocatalyst for C-N coupling reactions","authors":"Narinderjit Singh Sawaran Singh , Waqid Al-Mussawi , P. Jangir , Muktha Eti , Tanmoy Prida , S. Radhika , Gaganjot Kaur , Erkaboy Davletov , Usmonjon Akhmedov , Alisher Abduvokhidov , M.A. Diab , Heba A. El-Sabban","doi":"10.1016/j.jorganchem.2025.123938","DOIUrl":"10.1016/j.jorganchem.2025.123938","url":null,"abstract":"<div><div>In this inclusive innovation study, we developed a new green way to create bio-decorated palladium nanoparticles using an extract from <em>orange</em> leaves over the magnetic Fe<sub>3</sub>O<sub>4</sub> NPs to make a novel nanocatalyst. The <em>orange</em> leaf extract served as a green reducing agent and was great at keeping the stability of the nanoparticles we generated. Then, the produced Fe<sub>3</sub>O<sub>4</sub>/Pd NPs was carefully studied with different tests like FE-SEM, TEM, EDX, XRD, ICP-OES, and VSM. The desired Fe<sub>3</sub>O<sub>4</sub>/Pd NPs showed impressive activity for <em>N</em>-arylation of indole with iodo-arenes through a reaction called Ullmann-type C-N coupling. Different aryl halides were converted to <em>N</em>-arylated indoles with good results for aryl iodides and moderate yields for aryl bromides. Additionally, the Fe<sub>3</sub>O<sub>4</sub>/Pd NPs could be recovered and reused for 6 times with maintaining their effectiveness.</div></div>","PeriodicalId":374,"journal":{"name":"Journal of Organometallic Chemistry","volume":"1043 ","pages":"Article 123938"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145526682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2025-10-24DOI: 10.1016/j.jorganchem.2025.123913
Saba Jamil , Mehwish Shabbir , Nadia Mushtaq , Shanza Rauf Khan , Sarah Alharthi , Mohammed A. Amin , Muhammad Ramzan Saeed Ashraf Janjua , Muhammad Usman Khan
The nanocomposites have attained a lot of attention mainly due to their immense number of uses in various industries. This study used the Hummer's technique to synthesize graphene oxide and the hydrothermal approach to create tin cobalt oxide nanoparticles. Nanocomposites were synthesized by solvothermal method from the prepared graphene oxide and cobalt tin oxide nanoparticles. The freshly created product was examined using a variety of instruments to analyze its structure and related properties, such as Scanning Electron Microscope (to analyze the surface morphology and structure of materials at a very high magnification and resolution), UV-Vis spectroscopy(to evaluate the optical properties and monitor dye degradation by measuring light absorbance in the UV and visible range) and FTIR (to identify the functional groups and analyze the chemical bonding present in a materials by measuring its infrared absorption spectrum). Data were further analyzed by using different software i.e. MATCH, Origin and VESTA. Vesta software was used to confirm the structural composition of the product as well as its other parameters, which were explained by X-ray powder diffraction analysis (XRD) (to determine the crystalline structure,phase identification and crystalline size of materials by analyzing the diffraction pattern of X-rays interacting with the crystal lattice). The utilization of GOSnCoO nanocomposite for the degradation of Rhodamine B (RhB) dye was performed to investigate its photocatalytic activity. This nanocomposite was able to degrade and decolorize Congo red dye and RhB dye, suggesting its potential for wastewater treatments. Additionally, the nanocomposite was explored in other investigations as a fuel additive and differences in the flash point, fire point, pour point, and cloud point as key diesel oil characteristics. These key diesel oil characteristics varied as a result of the addition of the nanocomposite and in relation to concentration, affected the physicochemical behavior of the diesel. Exploring both environmental and fuel-related uses with a single material adds novelty and highlights its versatile potential.
{"title":"Synthesis, characterization, and catalytic applications of graphene oxide-based tin-cobalt oxide bimetallic nanocomposites (GOSnCoO): Structural insights and influence on fuel properties","authors":"Saba Jamil , Mehwish Shabbir , Nadia Mushtaq , Shanza Rauf Khan , Sarah Alharthi , Mohammed A. Amin , Muhammad Ramzan Saeed Ashraf Janjua , Muhammad Usman Khan","doi":"10.1016/j.jorganchem.2025.123913","DOIUrl":"10.1016/j.jorganchem.2025.123913","url":null,"abstract":"<div><div>The nanocomposites have attained a lot of attention mainly due to their immense number of uses in various industries. This study used the Hummer's technique to synthesize graphene oxide and the hydrothermal approach to create tin cobalt oxide nanoparticles. Nanocomposites were synthesized by solvothermal method from the prepared graphene oxide and cobalt tin oxide nanoparticles. The freshly created product was examined using a variety of instruments to analyze its structure and related properties, such as Scanning Electron Microscope (to analyze the surface morphology and structure of materials at a very high magnification and resolution), UV-Vis spectroscopy(to evaluate the optical properties and monitor dye degradation by measuring light absorbance in the UV and visible range) and FTIR (to identify the functional groups and analyze the chemical bonding present in a materials by measuring its infrared absorption spectrum). Data were further analyzed by using different software i.e. MATCH, Origin and VESTA. Vesta software was used to confirm the structural composition of the product as well as its other parameters, which were explained by X-ray powder diffraction analysis (XRD) (to determine the crystalline structure,phase identification and crystalline size of materials by analyzing the diffraction pattern of X-rays interacting with the crystal lattice). The utilization of GOSnCoO nanocomposite for the degradation of Rhodamine B (RhB) dye was performed to investigate its photocatalytic activity. This nanocomposite was able to degrade and decolorize Congo red dye and RhB dye, suggesting its potential for wastewater treatments. Additionally, the nanocomposite was explored in other investigations as a fuel additive and differences in the flash point, fire point, pour point, and cloud point as key diesel oil characteristics. These key diesel oil characteristics varied as a result of the addition of the nanocomposite and in relation to concentration, affected the physicochemical behavior of the diesel. Exploring both environmental and fuel-related uses with a single material adds novelty and highlights its versatile potential.</div></div>","PeriodicalId":374,"journal":{"name":"Journal of Organometallic Chemistry","volume":"1043 ","pages":"Article 123913"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145414699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2025-09-29DOI: 10.1016/j.jorganchem.2025.123878
Carmen-Irena Mitan , Petru Filip , Emerich Bartha , Lionel Delaude , Valerian Dragutan
This review explores the mechanistic diversity of enyne cycloisomerization reactions that yield a wide range of carbo- and heterocyclic compounds. The reaction outcome whether cycloisomerization, ring-closing metathesis, or skeletal reorganization is largely determined by the nature and position of functional groups on the substrate and the type of catalyst employed, including metal-carbene systems (e.g. Ru), non-carbene complexes (e.g. Ru, Pt, Pd, In), and halides (e.g. GaCl₃, InCl₃, AuCl). Capitalizing on experimental results and DFT studies, the influence of catalyst-substrate interactions on pathway selectivity and stereochemical outcomes is further discussed. 6π Electrocyclization, (n) cyclization and sigmatropic rearrangement in presence of Ru complexes, β-hydride elimination and reductive elimination or [5 cycloaddition / reductive elimination in presence of Pd or Ru complexes are surveyed.
{"title":"Exploring relevant features of the mechanism of enyne cycloisomerization reaction and related processes catalyzed by metal-carbenes and metal halides","authors":"Carmen-Irena Mitan , Petru Filip , Emerich Bartha , Lionel Delaude , Valerian Dragutan","doi":"10.1016/j.jorganchem.2025.123878","DOIUrl":"10.1016/j.jorganchem.2025.123878","url":null,"abstract":"<div><div>This review explores the mechanistic diversity of enyne cycloisomerization reactions that yield a wide range of carbo- and heterocyclic compounds. The reaction outcome whether cycloisomerization, ring-closing metathesis, or skeletal reorganization is largely determined by the nature and position of functional groups on the substrate and the type of catalyst employed, including metal-carbene systems (<em>e.g.</em> Ru), non-carbene complexes (<em>e.g.</em> Ru, Pt, Pd, In), and halides (<em>e.g.</em> GaCl₃, InCl₃, AuCl). Capitalizing on experimental results and DFT studies, the influence of catalyst-substrate interactions on pathway selectivity and stereochemical outcomes is further discussed. 6π Electrocyclization, (<em>n</em>) cyclization and sigmatropic rearrangement in presence of Ru complexes, β-hydride elimination and reductive elimination or [5 cycloaddition / reductive elimination in presence of Pd or Ru complexes are surveyed.</div></div>","PeriodicalId":374,"journal":{"name":"Journal of Organometallic Chemistry","volume":"1043 ","pages":"Article 123878"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145464338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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