Abstract A new series of 12 and 14‐membered tetraazamacrocyclic complexes, [ML1X2] and [ML2X2] [M = Mn(II), Zn(II), Co(II), Ni(II), X = Cl]; [ML1X2] and [ML2X2] [M = Cu(II), X = Cl or NO3, L1 and L2 = 12 and 14‐membered tetraazamacrocyclic ligands] have been prepared via the template condensation of 1,2‐dibromoethane or 1,3‐dibromopropane with aniline. The complexes have been characterized by elemental analyses, conductivity, IR, UV‐VIS, 1H NMR, magnetic susceptibility measurements, and x‐ray photoelectron spectra. An octahedral geometry has been assigned for all of the prepared metal complexes.
{"title":"Template Synthesis and Characterization of 12 and 14‐Membered Pendant‐Armed Tetraazamacrocyclic Transition Metal Complexes: A Photoelectron Spectroscopic Study","authors":"S. Srivastava, A. Kalam","doi":"10.1081/SIM-200026581","DOIUrl":"https://doi.org/10.1081/SIM-200026581","url":null,"abstract":"Abstract A new series of 12 and 14‐membered tetraazamacrocyclic complexes, [ML1X2] and [ML2X2] [M = Mn(II), Zn(II), Co(II), Ni(II), X = Cl]; [ML1X2] and [ML2X2] [M = Cu(II), X = Cl or NO3, L1 and L2 = 12 and 14‐membered tetraazamacrocyclic ligands] have been prepared via the template condensation of 1,2‐dibromoethane or 1,3‐dibromopropane with aniline. The complexes have been characterized by elemental analyses, conductivity, IR, UV‐VIS, 1H NMR, magnetic susceptibility measurements, and x‐ray photoelectron spectra. An octahedral geometry has been assigned for all of the prepared metal complexes.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":"2014 1","pages":"1529 - 1541"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86647092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. Trendafilova, I. Kostova, I. Manolov, G. Bauer, T. Mihaylov, I. Georgieva
Abstract The coordination ability of 3,3′‐benzylidenedi‐4‐hydroxycoumarin (H2bhc) has been proved in a complexation reaction with lanthanum(III) ion. The new lanthanum(III) complex of bhc2− was studied by elemental analyses, mass spectra, 1H, 13C NMR, and IR spectroscopy. The data obtained are in agreement with the metal:ligand ratio of 1:l, and the formula La(bhc)(OH)(H2O), where bhc2− = C25H14O6 2−. The calculated condensed Fukui functions for bhc2− predicted that both hydroxyl and carbonyl oxygen atoms are probable reactive sites for coordination to the metal. The vibrational analysis of the lanthanum(III) complex, free H2bhc, bhc2−, and 4‐hydroxycoumarin showed that in the La(III) complex the ligand coordinates to the metal ion through both deprotonated hydroxyl groups. The participation of both carbonyl groups in coordination to the metal ion was confirmed by the significant shift of ν(C˭O) to lower wave number.
{"title":"Synthesis and Spectroscopic Study of a New Lanthanum(III) Complex of 3,3′‐Benzylidenedi‐4‐hydroxycoumarin","authors":"N. Trendafilova, I. Kostova, I. Manolov, G. Bauer, T. Mihaylov, I. Georgieva","doi":"10.1081/SIM-200026618","DOIUrl":"https://doi.org/10.1081/SIM-200026618","url":null,"abstract":"Abstract The coordination ability of 3,3′‐benzylidenedi‐4‐hydroxycoumarin (H2bhc) has been proved in a complexation reaction with lanthanum(III) ion. The new lanthanum(III) complex of bhc2− was studied by elemental analyses, mass spectra, 1H, 13C NMR, and IR spectroscopy. The data obtained are in agreement with the metal:ligand ratio of 1:l, and the formula La(bhc)(OH)(H2O), where bhc2− = C25H14O6 2−. The calculated condensed Fukui functions for bhc2− predicted that both hydroxyl and carbonyl oxygen atoms are probable reactive sites for coordination to the metal. The vibrational analysis of the lanthanum(III) complex, free H2bhc, bhc2−, and 4‐hydroxycoumarin showed that in the La(III) complex the ligand coordinates to the metal ion through both deprotonated hydroxyl groups. The participation of both carbonyl groups in coordination to the metal ion was confirmed by the significant shift of ν(C˭O) to lower wave number.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":"30 1","pages":"1635 - 1650"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91231390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Three intermediate‐spin, six‐coordinate Co(III) complexes, [Co(CNCH2Ph)4{OAs(C6H4Me‐p)3}2](BF4)3, [Co(CNC6H11)4(OSbPh3)2](ClO4)3, and [Co(CNCH2Ph)4(OSbPh3)2](BF4)3, are shown to undergo labile ligand‐substitution reactions with selected trialkylphosphine ligands. Percent yields in reactions of [Co(CNCH2Ph)4{OAs(C6H4Me‐p)3}2](BF4)3 increase significantly when reactions are performed at lowered temperatures. [Co(CNC6H11)4(OSbPh3)2](ClO4)3 and [Co(CNCH2Ph)4(OSbPh3)2](BF4)3 react with P(C3H7‐n)3 and P(C4H9‐n)3 immediately at 0 °C to produce the known complexes, trans‐[Co(CNR)4(PR′3)2]X3, in good yields.
{"title":"Labile Ligand‐Substitution Reactions of Intermediate‐Spin Six‐Coordinate Cobalt(III) Complexes","authors":"C. Becker","doi":"10.1081/SIM-200026582","DOIUrl":"https://doi.org/10.1081/SIM-200026582","url":null,"abstract":"Abstract Three intermediate‐spin, six‐coordinate Co(III) complexes, [Co(CNCH2Ph)4{OAs(C6H4Me‐p)3}2](BF4)3, [Co(CNC6H11)4(OSbPh3)2](ClO4)3, and [Co(CNCH2Ph)4(OSbPh3)2](BF4)3, are shown to undergo labile ligand‐substitution reactions with selected trialkylphosphine ligands. Percent yields in reactions of [Co(CNCH2Ph)4{OAs(C6H4Me‐p)3}2](BF4)3 increase significantly when reactions are performed at lowered temperatures. [Co(CNC6H11)4(OSbPh3)2](ClO4)3 and [Co(CNCH2Ph)4(OSbPh3)2](BF4)3 react with P(C3H7‐n)3 and P(C4H9‐n)3 immediately at 0 °C to produce the known complexes, trans‐[Co(CNR)4(PR′3)2]X3, in good yields.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":"17 1","pages":"1543 - 1549"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73511746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The rare earth carbonates, M2(CO3)3 · xH2O, of Pr(III), Nd(III), Eu(III), Gd(III), Tb(III), Dy(III), Ho(III), Er(III), Tm(III), and Yb(III) have been synthesized by a novel synthetic method involving the reaction of aqueous solutions of the lanthanide(III) chloride with urea at ∼90 °C. A study of the infrared (IR) absorption spectra (400–4000 cm−1) of the formed products clearly indicates the absence of bands due to urea and shows the characteristic bands of carbonate ion. A general mechanism describing the formation of lanthanide(III) carbonates, M2(CO3)3 · xH2O, is suggested.
{"title":"A Novel Method for the Synthesis of Rare Earth Carbonates","authors":"M. Refat","doi":"10.1081/SIM-200026601","DOIUrl":"https://doi.org/10.1081/SIM-200026601","url":null,"abstract":"Abstract The rare earth carbonates, M2(CO3)3 · xH2O, of Pr(III), Nd(III), Eu(III), Gd(III), Tb(III), Dy(III), Ho(III), Er(III), Tm(III), and Yb(III) have been synthesized by a novel synthetic method involving the reaction of aqueous solutions of the lanthanide(III) chloride with urea at ∼90 °C. A study of the infrared (IR) absorption spectra (400–4000 cm−1) of the formed products clearly indicates the absence of bands due to urea and shows the characteristic bands of carbonate ion. A general mechanism describing the formation of lanthanide(III) carbonates, M2(CO3)3 · xH2O, is suggested.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":"9 1","pages":"1605 - 1613"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79706927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract 1‐Amino‐5‐benzoyl‐4‐phenyl‐1H‐pyrimidine‐2‐one (L′H2) reacts with benzil (L″O2) and salts Cu(AcO)2 · H2O, NiCl2 · 6H2O, Co(AcO)2 · 4H2O, CdCl2 · 2H2O in 2:1:2 molar ratio in n‐butanol to give several solid complexes of the general composition [(M)2(L′)2(L″)(X)4] · nH2O. The precursor and the metal complexes of the Schiff base have been characterized by elemental analyses, molar conductances, IR spectra, electronic, and thermal studies.
{"title":"The Template Synthesis, Characterization, and Thermal Investigation of New Heterocyclic Binucleating Schiff Base Complexes","authors":"M. Sönmez, M. Şekerci","doi":"10.1081/SIM-200026585","DOIUrl":"https://doi.org/10.1081/SIM-200026585","url":null,"abstract":"Abstract 1‐Amino‐5‐benzoyl‐4‐phenyl‐1H‐pyrimidine‐2‐one (L′H2) reacts with benzil (L″O2) and salts Cu(AcO)2 · H2O, NiCl2 · 6H2O, Co(AcO)2 · 4H2O, CdCl2 · 2H2O in 2:1:2 molar ratio in n‐butanol to give several solid complexes of the general composition [(M)2(L′)2(L″)(X)4] · nH2O. The precursor and the metal complexes of the Schiff base have been characterized by elemental analyses, molar conductances, IR spectra, electronic, and thermal studies.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":"95 1","pages":"1551 - 1561"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78754536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yinjuan Bai, Jun Lu, Haiying Gan, Zhenjun Wang, Zhen Shi
Abstract The condensation reactions of formylferrocene with active methylene‐ containing compounds were achieved by microwave irradiation, grinding or heating in water, in moderate to good yields. The structures were confirmed by 1H NMR, 13C NMR, IR spectra, and elemental analyses.
{"title":"Green Chemistry Approaches to Condensation Reactions of Formylferrocene with Active Methylene Containing Compounds","authors":"Yinjuan Bai, Jun Lu, Haiying Gan, Zhenjun Wang, Zhen Shi","doi":"10.1081/SIM-200026298","DOIUrl":"https://doi.org/10.1081/SIM-200026298","url":null,"abstract":"Abstract The condensation reactions of formylferrocene with active methylene‐ containing compounds were achieved by microwave irradiation, grinding or heating in water, in moderate to good yields. The structures were confirmed by 1H NMR, 13C NMR, IR spectra, and elemental analyses.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":"54 1","pages":"1487 - 1496"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74541857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The azo ligand 2‐(5‐acetylamino‐2‐hydroxyphenylazo)benzoic acid (H2L) is derived from the diazotization of 4‐acetamidophenol with anthranilic acid. Metal(II) and (III) chelates were prepared and characterized by elemental and thermal analyses, conductance, IR, mass, magnetic, and diffuse reflectance spectra. The complexes were found to have the formulae [Cr(HL)2]Cl · H2O; [Cd(HL)2] · 2H2O; [M(HL)(H2O) z ]X · nH2O for M = Co(II) (X = Cl, z = 1, n = 2), M = Ni(II) (X = Cl, z = 1, n = 2.5); M = Cu(II) (X = AcO, z = 2, n = 2), and M = Zn(II) (X = AcO, z = 1, n = 2); and [Fe(HL)Cl2(H2O)] · 2H2O. The molar conductance data reveal that the Cd(II) and Fe(III) chelates are non‐electrolytes, while the Cr(III), Co(II), Ni(II), Cu(II), and Zn(II) chelates are 1:1 electrolytes. IR spectra show that the ligand is coordinated to the metal ions in a terdentate manner with ONO donor sites of the phenolic OH, azo–N, and carboxylic OH. Magnetic and solid reflectance spectra were used to infer the coordinating capacity of the ligand and the geometrical structure of these complexes. The mass spectra give the possible molecular ion fragments resulting from the fragmentation of the chelates. The thermal behavior of these chelates shows that water molecules (coordinated and uncoordinated) and anions are removed in two successive steps followed immediately by decomposition of the ligand molecule in the subsequent steps. The relative thermal stability of the anhydrous chelates is evaluated. The final decomposition products are found to be the corresponding metal oxides. The thermodynamic activation parameters, such as, E*, ΔH*, ΔS*, and ΔG* are calculated from the TG curves and discussed.
摘要偶氮配体2 -(5 -乙酰氨基- 2 -羟基苯基偶氮)苯甲酸(H2L)是由4 -乙酰氨基苯酚与邻氨基苯甲酸重氮化而得。制备了金属(II)和(III)螯合物，并通过元素分析和热分析、电导、红外、质量、磁性和漫反射光谱对其进行了表征。发现配合物的分子式为[Cr(HL)2]Cl·H2O;[Cd(HL)2]·2H2O;[M (HL) (H2O) z] X·nH2O M =有限公司(II) (X = Cl, z = 1, n = 2), M =镍(II) (X = Cl, z = 1, n = 2.5);M = Cu(II) (X = AcO, z = 2, n = 2)， M = Zn(II) (X = AcO, z = 1, n = 2);和[Fe(HL)Cl2(H2O)]·2H2O。摩尔电导数据表明，Cd(II)和Fe(III)螯合物为非电解质，而Cr(III)、Co(II)、Ni(II)、Cu(II)和Zn(II)螯合物为1:1电解质。红外光谱表明，该配体与金属离子以三齿状配位的方式与酚羟基、偶氮氮和羧基羟基的ONO供体位点配位。利用磁性和固体反射光谱来推测配体的配位能力和这些配合物的几何结构。质谱给出了可能由螯合物断裂产生的分子离子碎片。这些螯合物的热行为表明，水分子(配位和非配位)和阴离子在两个连续的步骤中被去除，然后在随后的步骤中立即分解配体分子。评价了无水螯合物的相对热稳定性。最终的分解产物是相应的金属氧化物。根据热重曲线计算了E*、ΔH*、ΔS*、ΔG*等热力学活化参数，并对其进行了讨论。
{"title":"Synthesis, IR, Magnetic, Solid Reflectance, and Thermal Characterization of Transition Metal Chelates with 2‐(5‐Acetylamino‐2‐hydroxyphenylazo)‐benzoic Acid","authors":"G. Mohamed, Z. Zaki","doi":"10.1081/SIM-200026299","DOIUrl":"https://doi.org/10.1081/SIM-200026299","url":null,"abstract":"Abstract The azo ligand 2‐(5‐acetylamino‐2‐hydroxyphenylazo)benzoic acid (H2L) is derived from the diazotization of 4‐acetamidophenol with anthranilic acid. Metal(II) and (III) chelates were prepared and characterized by elemental and thermal analyses, conductance, IR, mass, magnetic, and diffuse reflectance spectra. The complexes were found to have the formulae [Cr(HL)2]Cl · H2O; [Cd(HL)2] · 2H2O; [M(HL)(H2O) z ]X · nH2O for M = Co(II) (X = Cl, z = 1, n = 2), M = Ni(II) (X = Cl, z = 1, n = 2.5); M = Cu(II) (X = AcO, z = 2, n = 2), and M = Zn(II) (X = AcO, z = 1, n = 2); and [Fe(HL)Cl2(H2O)] · 2H2O. The molar conductance data reveal that the Cd(II) and Fe(III) chelates are non‐electrolytes, while the Cr(III), Co(II), Ni(II), Cu(II), and Zn(II) chelates are 1:1 electrolytes. IR spectra show that the ligand is coordinated to the metal ions in a terdentate manner with ONO donor sites of the phenolic OH, azo–N, and carboxylic OH. Magnetic and solid reflectance spectra were used to infer the coordinating capacity of the ligand and the geometrical structure of these complexes. The mass spectra give the possible molecular ion fragments resulting from the fragmentation of the chelates. The thermal behavior of these chelates shows that water molecules (coordinated and uncoordinated) and anions are removed in two successive steps followed immediately by decomposition of the ligand molecule in the subsequent steps. The relative thermal stability of the anhydrous chelates is evaluated. The final decomposition products are found to be the corresponding metal oxides. The thermodynamic activation parameters, such as, E*, ΔH*, ΔS*, and ΔG* are calculated from the TG curves and discussed.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":"50 1","pages":"1497 - 1516"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82754524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Mashaly, Atef T. Ramadan, B. A. El‐Shetary, Areej K. Dawoud
Abstract The chelating properties the hydrazone ligand 2‐carboxyphenylhydrazo‐ethylcyanoacetate (H2L) have been studied. A new series of binary mononuclear complexes were prepared from the reaction of the hydrazone ligand (H2L) with the metal ions, Cd(II), Cu(II), Ni(II), Co(II), Th(IV), and UO2(VI), in the presence of LiOH as a deprotonating agent. The binary Cu(II) complex of H2L was reacted with the ligands 1,10‐phenanthroline or 2‐aminopyridine to form mixed‐ligand complexes. The binary complexes of Cu(II) and Ni(II) are suggested to have octahedral configurations. The Cd(II) and Co(II) complexes are suggested to have tetrahedral and/or square‐planar geometries, respectively. The Th(IV) and UO2(VI) complexes are suggested to have octahedral and dodecahedral geometries, respectively. The mixed‐ligand complexes have octahedral configurations. Also, new complexes were obtained pyrolytically as the previous complexes decompose through several isolable as well as non‐isolable intermediates during heating. The structures of all complexes and the corresponding thermal products were elucidated by elemental analyses, conductance, IR and electronic absorption spectra, magnetic moments, 1H NMR and TG–DSC measurements, as well as by mass spectroscopy. The ligand and some of the metal complexes were found to activate the enzyme pectinlyase.
{"title":"Synthesis and Characterization of New Transition and Actinide Metal Complexes of a Hydrazone Ligand. Mixed‐Ligand Complexes, Pyrolysis Products, and Biological Activity","authors":"M. Mashaly, Atef T. Ramadan, B. A. El‐Shetary, Areej K. Dawoud","doi":"10.1081/SIM-200026202","DOIUrl":"https://doi.org/10.1081/SIM-200026202","url":null,"abstract":"Abstract The chelating properties the hydrazone ligand 2‐carboxyphenylhydrazo‐ethylcyanoacetate (H2L) have been studied. A new series of binary mononuclear complexes were prepared from the reaction of the hydrazone ligand (H2L) with the metal ions, Cd(II), Cu(II), Ni(II), Co(II), Th(IV), and UO2(VI), in the presence of LiOH as a deprotonating agent. The binary Cu(II) complex of H2L was reacted with the ligands 1,10‐phenanthroline or 2‐aminopyridine to form mixed‐ligand complexes. The binary complexes of Cu(II) and Ni(II) are suggested to have octahedral configurations. The Cd(II) and Co(II) complexes are suggested to have tetrahedral and/or square‐planar geometries, respectively. The Th(IV) and UO2(VI) complexes are suggested to have octahedral and dodecahedral geometries, respectively. The mixed‐ligand complexes have octahedral configurations. Also, new complexes were obtained pyrolytically as the previous complexes decompose through several isolable as well as non‐isolable intermediates during heating. The structures of all complexes and the corresponding thermal products were elucidated by elemental analyses, conductance, IR and electronic absorption spectra, magnetic moments, 1H NMR and TG–DSC measurements, as well as by mass spectroscopy. The ligand and some of the metal complexes were found to activate the enzyme pectinlyase.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":"7 1","pages":"1319 - 1348"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75568015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The synthesis and spectral characterization of new copper(II) complexes of the composition CuL2X2 [where L = 2‐methylcyclohexanone thiosemicarbazone (L1) and 4 N‐methyl thiosemi‐carbazone (L2) and X = Cl, NO3, and 0.5SO4] are reported. All the complexes have been characterized by IR, electronic, EPR, and mass spectral studies, magnetic moments, and conductivity measurements. A tetragonal geometry has been assigned to all the complexes except the sulfato complexes which were found to have five coordinated square‐pyramidal geometry.
摘要报道了新型铜(II)配合物CuL2X2的合成和光谱表征[其中L = 2‐甲基环己酮硫代氨基卡巴酮(L1)和4n‐甲基硫代氨基卡巴酮(L2)， X = Cl, NO3和0.5SO4]。所有配合物都通过IR，电子，EPR和质谱研究，磁矩和电导率测量进行了表征。除了磺胺配合物外，所有配合物都具有四边形几何形状，磺胺配合物具有五个协调的方锥体几何形状。
{"title":"Synthesis, Magnetic and Spectral Studies on Copper(II) Complexes with Bidentate Thiosemicarbazones","authors":"S. Chandra, U. Kumar","doi":"10.1081/SIM-200026270","DOIUrl":"https://doi.org/10.1081/SIM-200026270","url":null,"abstract":"Abstract The synthesis and spectral characterization of new copper(II) complexes of the composition CuL2X2 [where L = 2‐methylcyclohexanone thiosemicarbazone (L1) and 4 N‐methyl thiosemi‐carbazone (L2) and X = Cl, NO3, and 0.5SO4] are reported. All the complexes have been characterized by IR, electronic, EPR, and mass spectral studies, magnetic moments, and conductivity measurements. A tetragonal geometry has been assigned to all the complexes except the sulfato complexes which were found to have five coordinated square‐pyramidal geometry.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":"56 1","pages":"1417 - 1430"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86539687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract A series of 18 new coordination compounds of dioxouranium(VI) with semicarbazones of 4‐aminoantipyrine, viz., 4[N‐(p‐dimethylaminobenzylidene)amino]antipyrine semicarbazone (DABAAPS), 4[N‐(2′‐nitrobenzylidene)amino]antipyrine semicarbazone (2′‐NO2BAAPS), and 4[N‐(3′‐nitrobenzylidene)amino]antipyrine semicarbazone (3′‐NO2BAAPS) of the general composition [UO2L2X2] (X = Br, I, or NCS), [UO2L2](ClO4)2, [UO2L(NO3)2], and [UO2L(OOCCH3)2] (L = DABAAPS, 2′‐NO2BAAPS, and 3′‐NO2BAAPS) were synthesized in non‐aqueous solution and characterized on the basis of elemental analyses, electrical conductivity, magnetic moments, and IR spectral studies. In all of the complexes, these ligands act as neutral tridentate (N, N, O) ligands. In all dioxouranium(VI) complexes, the ν1 and ν3 modes are assigned to 845–825 cm−1 and 930–910 cm−1, respectively. Wilson's G‐F matrix method was used to determine the stretching and interaction force constants from which the U–O bond distances were calculated using Badger's formula. The probable coordination number of U(VI) varies from 8–10 in these complexes. The thermal properties of these compounds are also discussed.
{"title":"Synthesis, Structural, and Thermal Aspects of Dioxouranium(VI) Coordination Compounds of Semicarbazones Derived from 4‐Aminoantipyrine","authors":"R. Agarwal, I. Chakraborti, H. Agarwal","doi":"10.1081/SIM-200026288","DOIUrl":"https://doi.org/10.1081/SIM-200026288","url":null,"abstract":"Abstract A series of 18 new coordination compounds of dioxouranium(VI) with semicarbazones of 4‐aminoantipyrine, viz., 4[N‐(p‐dimethylaminobenzylidene)amino]antipyrine semicarbazone (DABAAPS), 4[N‐(2′‐nitrobenzylidene)amino]antipyrine semicarbazone (2′‐NO2BAAPS), and 4[N‐(3′‐nitrobenzylidene)amino]antipyrine semicarbazone (3′‐NO2BAAPS) of the general composition [UO2L2X2] (X = Br, I, or NCS), [UO2L2](ClO4)2, [UO2L(NO3)2], and [UO2L(OOCCH3)2] (L = DABAAPS, 2′‐NO2BAAPS, and 3′‐NO2BAAPS) were synthesized in non‐aqueous solution and characterized on the basis of elemental analyses, electrical conductivity, magnetic moments, and IR spectral studies. In all of the complexes, these ligands act as neutral tridentate (N, N, O) ligands. In all dioxouranium(VI) complexes, the ν1 and ν3 modes are assigned to 845–825 cm−1 and 930–910 cm−1, respectively. Wilson's G‐F matrix method was used to determine the stretching and interaction force constants from which the U–O bond distances were calculated using Badger's formula. The probable coordination number of U(VI) varies from 8–10 in these complexes. The thermal properties of these compounds are also discussed.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":"102 1","pages":"1453 - 1470"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78174468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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