Abstract The reactions of copper(II) halides with 1,3‐bis(benzimidazol‐2‐yl)benzene and its N‐methylated derivative afforded binuclear and mononuclear complexes, respectively. Mononuclear perchlorate complexes have also been synthesized by the reactions of the aforesaid ligands with hydrated copper perchlorate. The complexes have been characterized by elemental analyses, conductivity and magnetic measurements, TGA studies, IR, electronic, and ESR spectral studies.
{"title":"Synthesis and Properties of Mononuclear and Binuclear Copper(II) Complexes Stabilized by bis‐Benzimidazolyl Ligands","authors":"Shivakumaraiah, N. Gowda","doi":"10.1081/SIM-200030171","DOIUrl":"https://doi.org/10.1081/SIM-200030171","url":null,"abstract":"Abstract The reactions of copper(II) halides with 1,3‐bis(benzimidazol‐2‐yl)benzene and its N‐methylated derivative afforded binuclear and mononuclear complexes, respectively. Mononuclear perchlorate complexes have also been synthesized by the reactions of the aforesaid ligands with hydrated copper perchlorate. The complexes have been characterized by elemental analyses, conductivity and magnetic measurements, TGA studies, IR, electronic, and ESR spectral studies.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77379430","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 In this study, dipositive platinum(II) complexes of the general formula [Pt(L–L)(dppmS2)](ClO4)2, where dppmS2 = Ph2P(S)CH2P(S)Ph2 and L–L = dppm (Ph2PCH2PPh2), dppe (Ph2PCH2CH2PPh2), and dppp (Ph2PCH2CH2CH2PPh2), have been synthesized and characterized by 31P{1H} NMR, 13C NMR, IR spectra and elemental analyses.
{"title":"Ionic Pt(II) Complexes Containing bis(Diphenylthiophosphinyl)methane","authors":"S. Irişli, Leman Alkan","doi":"10.1081/SIM-200030224","DOIUrl":"https://doi.org/10.1081/SIM-200030224","url":null,"abstract":"Abstract In this study, dipositive platinum(II) complexes of the general formula [Pt(L–L)(dppmS2)](ClO4)2, where dppmS2 = Ph2P(S)CH2P(S)Ph2 and L–L = dppm (Ph2PCH2PPh2), dppe (Ph2PCH2CH2PPh2), and dppp (Ph2PCH2CH2CH2PPh2), have been synthesized and characterized by 31P{1H} NMR, 13C NMR, IR spectra and elemental analyses.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72963544","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. Nath, Sandeep Pokharia, G. Eng, Xueqing Song, Ashok Kumar
Abstract New diphenyltin(IV) derivatives of the formula Ph2SnL, where L is the dianion of glycyltryptophan (Gly‐Trp), glycylphenylalanine (Gly‐Phe), valylvaline (Val‐Val), alanylvaline (Ala‐Val), and leucylalanine (Leu‐Ala), have been synthesized by the reaction of Ph2SnCl2 and the disodium salt of the respective dipeptides. The bonding and coordination behaviour in these derivatives are discussed on the basis of IR, multinuclear 1H, 13C, and 119Sn NMR and 119Sn Mössbauer spectroscopic studies. These investigations suggest that all the dipeptides in Ph2SnL act as dianionic tridentate ligands coordinating through the COO−, NH2, and Npeptide groups. The 119Sn Mössbauer studies, together with the NMR data, suggest a trigonal‐bipyramidal geometry around tin in Ph2SnL with the phenyl groups and Npeptide in the equatorial positions, whereas a carboxylic oxygen and the amino nitrogen atom occupy the axial positions. The anti‐inflammatory and cardiovascular activities, and toxicity of all the synthesized diphenyltin(IV) derivatives of dipeptides and of n‐dibutyltin(IV) derivatives of dipeptides (synthesized and characterized earlier) viz. Gly‐Trp, Val‐Val, Ala‐Val, glycyltyrosine (Gly‐Tyr), leucyltyrosine (Leu‐Tyr), and leucylleucine (Leu‐Leu) are discussed. The n‐dibutyltin(IV) derivatives exhibit better cardiovascular and anti‐inflammatory activities than the diphenyltin(IV) analogues.
{"title":"Diorganotin(IV) Derivatives of Dipeptides Containing at Least One Essential Amino Acid Residue: Synthesis, Characteristic Spectral Data, Cardiovascular, and Anti‐inflammatory Activities","authors":"M. Nath, Sandeep Pokharia, G. Eng, Xueqing Song, Ashok Kumar","doi":"10.1081/SIM-200030161","DOIUrl":"https://doi.org/10.1081/SIM-200030161","url":null,"abstract":"Abstract New diphenyltin(IV) derivatives of the formula Ph2SnL, where L is the dianion of glycyltryptophan (Gly‐Trp), glycylphenylalanine (Gly‐Phe), valylvaline (Val‐Val), alanylvaline (Ala‐Val), and leucylalanine (Leu‐Ala), have been synthesized by the reaction of Ph2SnCl2 and the disodium salt of the respective dipeptides. The bonding and coordination behaviour in these derivatives are discussed on the basis of IR, multinuclear 1H, 13C, and 119Sn NMR and 119Sn Mössbauer spectroscopic studies. These investigations suggest that all the dipeptides in Ph2SnL act as dianionic tridentate ligands coordinating through the COO−, NH2, and Npeptide groups. The 119Sn Mössbauer studies, together with the NMR data, suggest a trigonal‐bipyramidal geometry around tin in Ph2SnL with the phenyl groups and Npeptide in the equatorial positions, whereas a carboxylic oxygen and the amino nitrogen atom occupy the axial positions. The anti‐inflammatory and cardiovascular activities, and toxicity of all the synthesized diphenyltin(IV) derivatives of dipeptides and of n‐dibutyltin(IV) derivatives of dipeptides (synthesized and characterized earlier) viz. Gly‐Trp, Val‐Val, Ala‐Val, glycyltyrosine (Gly‐Tyr), leucyltyrosine (Leu‐Tyr), and leucylleucine (Leu‐Leu) are discussed. The n‐dibutyltin(IV) derivatives exhibit better cardiovascular and anti‐inflammatory activities than the diphenyltin(IV) analogues.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78408148","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 new vic‐dioxime ligand, namely 2‐(4,5‐bishydroxyimino‐1,3‐dithiolan‐2‐ylidene)malonic acid diethyl ester (LH2), has been synthesized in two steps starting with the condensation of carbon disulphide and malonic acid diethyl ester and subsequent reaction of the dithiolate intermediate with anti‐dichloroglyoxime (DCGO) in ethanol at 5 °C. LH2 forms mononuclear N,N′‐coordinated planar metal complexes with Ni(II) and Co(II) and N,O‐coordinated (μ‐hydroxo‐bridged dimeric complex with UO2(VI). The octahedral complex (LH)2CoPyCl has been prepared by oxidation of the (LH)2Co complex in the presence of pyridine, and it has been reduced to the Co(I) derivative by NaBH4.
{"title":"Synthesis and Complexation of a Novel vic‐Dithioglyoxime","authors":"A. Cihan, S. Uysal","doi":"10.1081/SIM-200030236","DOIUrl":"https://doi.org/10.1081/SIM-200030236","url":null,"abstract":"Abstract A new vic‐dioxime ligand, namely 2‐(4,5‐bishydroxyimino‐1,3‐dithiolan‐2‐ylidene)malonic acid diethyl ester (LH2), has been synthesized in two steps starting with the condensation of carbon disulphide and malonic acid diethyl ester and subsequent reaction of the dithiolate intermediate with anti‐dichloroglyoxime (DCGO) in ethanol at 5 °C. LH2 forms mononuclear N,N′‐coordinated planar metal complexes with Ni(II) and Co(II) and N,O‐coordinated (μ‐hydroxo‐bridged dimeric complex with UO2(VI). The octahedral complex (LH)2CoPyCl has been prepared by oxidation of the (LH)2Co complex in the presence of pyridine, and it has been reduced to the Co(I) derivative by NaBH4.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90601559","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 Cobaloximes of the type [CoX(Hdmg)2B] [X = Cl, CN, SCN or I, and B = py (pyridine), 4‐aminopy (4‐aminopyridine), or bipy (2,2′‐bipyridine)], [CoCl2(Hdmg)B] [B = bipy and phen (1,10‐phenathroline)], and [CoPF4(Hdmg)2py] were synthesized and characterized by elemental analyses, melting points, solubility, conductivity, room temperature, magnetic susceptibility measurements, infrared and UV‐VIS electronic spectra, and cyclic voltammetry. The complexes melted/decomposed at 220–314 °C and, with the exception of a few, many of them dissolved only in coordinating organic solvents. The complexes are orange to brown. They are also non‐electrolytes in organic solvents. The IR spectra indicated that the complexes coordinate through the N atom of the oxime group of each ligand. The magnetic susceptibilities and electronic spectra of the complexes indicated that they are low‐spin d6 octahedral. Electrochemical studies on some of the complexes, using cyclic voltammetry, revealed that some of the complexes underwent reversible oxidation–reduction and are, therefore, viable models for vitamin B12. A variety of structures have been proposed for the complexes.
摘要合成了[CoX(Hdmg)2B] [X = Cl, CN, SCN或I, and B = py(吡啶)，4‐氨基吡啶(4‐氨基吡啶)，或bipy(2,2′‐联吡啶)]，[CoCl2(Hdmg)B] [B = bipy and phen(1,10‐phenathroline)]和[CoPF4(Hdmg)2py]型钴酰肟，并通过元素分析，熔点，溶解度，电导率，室温，磁化率测量，红外和紫外- VIS电子光谱以及循环伏安法对其进行了表征。这些配合物在220-314℃下熔化/分解，除少数外，许多配合物仅在配位有机溶剂中溶解。复合物呈橙色到棕色。它们在有机溶剂中也是非电解质。红外光谱表明，配合物通过配体肟基的N原子进行配位。配合物的磁化率和电子能谱表明它们是低自旋d6八面体。利用循环伏安法对一些配合物进行电化学研究，发现其中一些配合物发生了可逆的氧化还原，因此是维生素B12的可行模型。人们提出了各种各样的配合物结构。
{"title":"Cobalt(III) Complexes of Dimethylglyoxime with No Direct Cobalt–Carbon Bond as Possible Non‐Organometallic Models for Vitamin B12","authors":"G. Kolawole, N. P. Ndahi","doi":"10.1081/SIM-200026589","DOIUrl":"https://doi.org/10.1081/SIM-200026589","url":null,"abstract":"Abstract Cobaloximes of the type [CoX(Hdmg)2B] [X = Cl, CN, SCN or I, and B = py (pyridine), 4‐aminopy (4‐aminopyridine), or bipy (2,2′‐bipyridine)], [CoCl2(Hdmg)B] [B = bipy and phen (1,10‐phenathroline)], and [CoPF4(Hdmg)2py] were synthesized and characterized by elemental analyses, melting points, solubility, conductivity, room temperature, magnetic susceptibility measurements, infrared and UV‐VIS electronic spectra, and cyclic voltammetry. The complexes melted/decomposed at 220–314 °C and, with the exception of a few, many of them dissolved only in coordinating organic solvents. The complexes are orange to brown. They are also non‐electrolytes in organic solvents. The IR spectra indicated that the complexes coordinate through the N atom of the oxime group of each ligand. The magnetic susceptibilities and electronic spectra of the complexes indicated that they are low‐spin d6 octahedral. Electrochemical studies on some of the complexes, using cyclic voltammetry, revealed that some of the complexes underwent reversible oxidation–reduction and are, therefore, viable models for vitamin B12. A variety of structures have been proposed for the complexes.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78081277","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 Condensation of 1,3‐diaminopropane‐2‐ol with diacetylmonoxime and acetylacetone yielded the tetradentate Schiff bases N,N′‐(2‐hydroxy)propylene‐bis{(2‐imino‐3‐oximino)butane} (H2L1) and N,N′‐(2‐hydroxy)propylene‐bis(acetylacetoneimine) (H2L2), respectively. The ligands form mononuclear manganese(II) complexes of the type [Mn(II)(L1)] (1) and [Mn(II)(L2)] (3), which are used for the formation of the manganese(III) heterochelates of the type [Mn(III)(L)(L‐L)] (where H2L = H2L1 or H2L2; L‐L = anion of acetylacetone or salicylaldehyde). Cationic heterochelates of the type [Mn(L)(L‐L)]ClO4 where H2L = H2L1 or H2L2 and L‐L = ethylenediamine and N,N′‐propylene‐bis(benzaldimine) (L3) have been synthesized by the reactions of bis(acetylacetonato)manganese(II) or bis(salicylaldehydato)manganese(II) with the preformed Schiff bases or by the reactions of [Mn(II)(L1)] or [Mn(II)(L2)] with L‐L in absolute alcohol under reflux. Some of the complexes, synthesized here, may be used as precursors in the synthesis of higher nuclearity manganese complexes. Air oxidation of [Mn(II)(L1)] (1) and [Mn(II)(L2)] (3) in DMF yielded the dark‐brown µ‐dioxo‐bis‐[N,N′‐(2‐hydroxy)propylene‐bis{(2‐imino‐3‐oximino)butane}]dimangenese(IV) (2) and µ‐dioxo‐bis[N,N′‐(2‐hydroxy)propylene‐bis{(acetylacetoneimine)}]dimangenese(IV) (4) complexes, respectively. All of the complexes have been characterized with the help of elemental analyses, molar conductance values, molecular weights, magnetic moments, and spectroscopic (IR, UV‐VIS, ESR) data.
{"title":"Synthesis and Characterization of Some New Manganese(II) Complexes, Manganese(III) Heterochelates, and µ‐Dioxo‐dimanganese(IV) Complexes Involving Tetradentate Schiff Bases","authors":"K. Dey, S. Biswas, Saikat Sarkar","doi":"10.1081/SIM-200026605","DOIUrl":"https://doi.org/10.1081/SIM-200026605","url":null,"abstract":"Abstract Condensation of 1,3‐diaminopropane‐2‐ol with diacetylmonoxime and acetylacetone yielded the tetradentate Schiff bases N,N′‐(2‐hydroxy)propylene‐bis{(2‐imino‐3‐oximino)butane} (H2L1) and N,N′‐(2‐hydroxy)propylene‐bis(acetylacetoneimine) (H2L2), respectively. The ligands form mononuclear manganese(II) complexes of the type [Mn(II)(L1)] (1) and [Mn(II)(L2)] (3), which are used for the formation of the manganese(III) heterochelates of the type [Mn(III)(L)(L‐L)] (where H2L = H2L1 or H2L2; L‐L = anion of acetylacetone or salicylaldehyde). Cationic heterochelates of the type [Mn(L)(L‐L)]ClO4 where H2L = H2L1 or H2L2 and L‐L = ethylenediamine and N,N′‐propylene‐bis(benzaldimine) (L3) have been synthesized by the reactions of bis(acetylacetonato)manganese(II) or bis(salicylaldehydato)manganese(II) with the preformed Schiff bases or by the reactions of [Mn(II)(L1)] or [Mn(II)(L2)] with L‐L in absolute alcohol under reflux. Some of the complexes, synthesized here, may be used as precursors in the synthesis of higher nuclearity manganese complexes. Air oxidation of [Mn(II)(L1)] (1) and [Mn(II)(L2)] (3) in DMF yielded the dark‐brown µ‐dioxo‐bis‐[N,N′‐(2‐hydroxy)propylene‐bis{(2‐imino‐3‐oximino)butane}]dimangenese(IV) (2) and µ‐dioxo‐bis[N,N′‐(2‐hydroxy)propylene‐bis{(acetylacetoneimine)}]dimangenese(IV) (4) complexes, respectively. All of the complexes have been characterized with the help of elemental analyses, molar conductance values, molecular weights, magnetic moments, and spectroscopic (IR, UV‐VIS, ESR) data.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87519909","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 new series of binary and ternary complexes of zirconium(IV) with N‐naphthylideneamino acids and some imidazoles has been synthesized. The complexes were characterized on the basis of elemental analyses, 1H NMR, IR and electronic spectra, conductivity, and thermal analytical data. It was found that N‐naphthylideneamino acids act as divalent tridentate (ONO) Schiff bases, whereas the imidazoles behave as monodentate ligands. The involvement of anions (OAc− and Cl−) in coordination was explored. The apparent formation constant values of Zr(IV)–Schiff base binary complexes were determined by a continous‐variation spectrophotometric method. Voltammetric results indicate that some of the prepared complexes underwent two successive, irreversible and reversible one‐electron charge transfer steps coupled with a follow‐up chemical reaction. The stability and redox properties of complexes are discussed in relation to the ligand molecular structure.
{"title":"Binary Complexes of Zirconium(IV) Naphthylideneamino Acids and their Ternary Complexes with Some Imidazoles. Synthesis, Characterization, and Electrochemical Studies","authors":"M. K. Rabia, Gamila Y. Aly, Maha A. F. Al‐Mohanna","doi":"10.1081/SIM-200026620","DOIUrl":"https://doi.org/10.1081/SIM-200026620","url":null,"abstract":"Abstract A new series of binary and ternary complexes of zirconium(IV) with N‐naphthylideneamino acids and some imidazoles has been synthesized. The complexes were characterized on the basis of elemental analyses, 1H NMR, IR and electronic spectra, conductivity, and thermal analytical data. It was found that N‐naphthylideneamino acids act as divalent tridentate (ONO) Schiff bases, whereas the imidazoles behave as monodentate ligands. The involvement of anions (OAc− and Cl−) in coordination was explored. The apparent formation constant values of Zr(IV)–Schiff base binary complexes were determined by a continous‐variation spectrophotometric method. Voltammetric results indicate that some of the prepared complexes underwent two successive, irreversible and reversible one‐electron charge transfer steps coupled with a follow‐up chemical reaction. The stability and redox properties of complexes are discussed in relation to the ligand molecular structure.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81535600","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 bis(O,O′‐dibenzyldithiophosphato)Ni(II) adduct, [(PhCH2O)2PS2]2Ni(bpy), was synthesized by the reaction of [(PhCH2O)2PS2]2Ni with 2,2′‐bipyridine in the solid state. Single crystals of the title compound as the dihydrate were obtained by recrystallization in ethanol–distilled water (v/v = 9:1). The structure characterization was performed by means of IR, elemental analyses, and single crystal x‐ray analysis. The crystal of the title compound consists of two disconnected structural units, each of which includes two non‐coordination water molecules. The coordination geometry of each Ni atom is a distorted octahedron. The thermogravimetric (TG) data indicate that thermal decomposition of the title compound takes place in four steps and the residue is Ni(OPS2)2.
{"title":"Synthesis, Crystal Structure and Thermal Studies of bis(O,O′‐Dibenzyldithiophosphato)‐(2,2′‐Bipyridine)nickel(II) Complex","authors":"F. Jian, G. Zheng, Hailian Xiao","doi":"10.1081/SIM-200026301","DOIUrl":"https://doi.org/10.1081/SIM-200026301","url":null,"abstract":"Abstract The bis(O,O′‐dibenzyldithiophosphato)Ni(II) adduct, [(PhCH2O)2PS2]2Ni(bpy), was synthesized by the reaction of [(PhCH2O)2PS2]2Ni with 2,2′‐bipyridine in the solid state. Single crystals of the title compound as the dihydrate were obtained by recrystallization in ethanol–distilled water (v/v = 9:1). The structure characterization was performed by means of IR, elemental analyses, and single crystal x‐ray analysis. The crystal of the title compound consists of two disconnected structural units, each of which includes two non‐coordination water molecules. The coordination geometry of each Ni atom is a distorted octahedron. The thermogravimetric (TG) data indicate that thermal decomposition of the title compound takes place in four steps and the residue is Ni(OPS2)2.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79635251","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 Manganese(II), cobalt(II), nickel(II), and copper(II) complexes with a new tetradentate ligand, 1,3,7,9‐tetraaza‐4,10‐diketo‐6,12‐diphenyl‐2,8‐dithiocyclododecane (L), were synthesized and characterized by elemental analyses, molar conductance measurements, magnetic susceptibility measurements, mass, 1H NMR, IR, electronic, EPR spectral and cyclic voltammetric studies. On the basis of the IR, electronic, and EPR spectral studies, an octahedral geometry has been assigned for the Mn(II) and Co(II) complexes, a square‐planar one for the Ni(II) and a tetragonal one for the Cu(II) complexes.
{"title":"Synthesis, Physicochemical and Electrochemical Studies on Mn(II), Co(II), Ni(II), and Cu(II) Complexes with an N‐Donor Tetradentate (N4) Macrocycle Ligand Derived from Ethyl Cinnamate","authors":"S. Chandra, L. Gupta, Sangeetika","doi":"10.1081/SIM-200026596","DOIUrl":"https://doi.org/10.1081/SIM-200026596","url":null,"abstract":"Abstract Manganese(II), cobalt(II), nickel(II), and copper(II) complexes with a new tetradentate ligand, 1,3,7,9‐tetraaza‐4,10‐diketo‐6,12‐diphenyl‐2,8‐dithiocyclododecane (L), were synthesized and characterized by elemental analyses, molar conductance measurements, magnetic susceptibility measurements, mass, 1H NMR, IR, electronic, EPR spectral and cyclic voltammetric studies. On the basis of the IR, electronic, and EPR spectral studies, an octahedral geometry has been assigned for the Mn(II) and Co(II) complexes, a square‐planar one for the Ni(II) and a tetragonal one for the Cu(II) complexes.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74596150","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 Self‐assembled symmetrical metal dithiocarbamates of the type M2(hdtc), where [M = Co(II), Ni(II), Cu(II), Zn(II), Cd(II), and Hg(II) and hdtc = (S2N2C3H4)2CH2] with a closed‐ring system, have been synthesized by a convenient one‐pot synthesis in moderate yields. Based on elemental analyses, IR, TGA, and magnetic susceptibility measurements, a square‐planar geometry has been proposed for the Co(II), Ni(II), and Cu(II) dithiocarbamates, while the Zn(II), Cd(II), and Hg(II) complexes have been suggested to have a tetrahedral geometry. It has been observed that the dithiocarbamato moiety is symmetrically bonded to the metal ion via both sulfur atoms of the –NCS2 group. Since the dithiocarbamates are covalently bonded to the metal ions they are non‐conducting in solution.
{"title":"Convenient One‐Pot Synthesis of Symmetrical Dithiocarbamates","authors":"Shahab A. A. Nami, K. S. Siddiqi","doi":"10.1081/SIM-200026593","DOIUrl":"https://doi.org/10.1081/SIM-200026593","url":null,"abstract":"Abstract Self‐assembled symmetrical metal dithiocarbamates of the type M2(hdtc), where [M = Co(II), Ni(II), Cu(II), Zn(II), Cd(II), and Hg(II) and hdtc = (S2N2C3H4)2CH2] with a closed‐ring system, have been synthesized by a convenient one‐pot synthesis in moderate yields. Based on elemental analyses, IR, TGA, and magnetic susceptibility measurements, a square‐planar geometry has been proposed for the Co(II), Ni(II), and Cu(II) dithiocarbamates, while the Zn(II), Cd(II), and Hg(II) complexes have been suggested to have a tetrahedral geometry. It has been observed that the dithiocarbamato moiety is symmetrically bonded to the metal ion via both sulfur atoms of the –NCS2 group. Since the dithiocarbamates are covalently bonded to the metal ions they are non‐conducting in solution.","PeriodicalId":22160,"journal":{"name":"Synthesis and Reactivity in Inorganic and Metal-organic Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79765833","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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