Five-co-ordination with ‘hybrid’ ligands. Part VII. Cobalt(II) and nickel(II) complexes with asymmetric tripod ligands having N2OP, N2SP, and NOAs2 donor sets
{"title":"Five-co-ordination with ‘hybrid’ ligands. Part VII. Cobalt(II) and nickel(II) complexes with asymmetric tripod ligands having N2OP, N2SP, and NOAs2 donor sets","authors":"R. Morassi, L. Sacconi","doi":"10.1039/J19710001487","DOIUrl":null,"url":null,"abstract":"The asymmetric ‘tripod’ ligands N-[2-(diphenylphosphino)ethyl]-N-(2-methoxyethyl)-N′N′- diethylthylenediamine (I; donor set N2OP) and N-[2-(diphenylphosphino)ethyl)-N-[2-(methylthio)ethyl]-N′N′-diethylethylenediamine (II; donor set N2SP) form cobalt(II) and nickel(II) complexes with general formula [MLX]BPh4(X = halogen or NCS). The cobalt(II) complexes are high-spin and five-co-ordinate, probably trigonal bipyramidal, both in the solid state and in solution. The [NiLX]BPh4 complexes with L =(I), X = l or NCS are low-spin and probably five-co-ordinate in the solid state with a distorted square-pyramidal stereochemistry. All the other nickel complexes are thought to have a square-planar structure with the ligand L being terdentate with an NNP donor set. The complex [Ni(NOAs2)l]BPh4 derived from the ligand NN-bis-(2-diphenylarsinoethyl)-2-methoxyethylamine (III; donor set NOAs2) is accorded a five-co-ordinate, ‘elongated’ square-pyramidal structure.","PeriodicalId":17321,"journal":{"name":"Journal of The Chemical Society A: Inorganic, Physical, Theoretical","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Chemical Society A: Inorganic, Physical, Theoretical","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1039/J19710001487","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
Abstract
The asymmetric ‘tripod’ ligands N-[2-(diphenylphosphino)ethyl]-N-(2-methoxyethyl)-N′N′- diethylthylenediamine (I; donor set N2OP) and N-[2-(diphenylphosphino)ethyl)-N-[2-(methylthio)ethyl]-N′N′-diethylethylenediamine (II; donor set N2SP) form cobalt(II) and nickel(II) complexes with general formula [MLX]BPh4(X = halogen or NCS). The cobalt(II) complexes are high-spin and five-co-ordinate, probably trigonal bipyramidal, both in the solid state and in solution. The [NiLX]BPh4 complexes with L =(I), X = l or NCS are low-spin and probably five-co-ordinate in the solid state with a distorted square-pyramidal stereochemistry. All the other nickel complexes are thought to have a square-planar structure with the ligand L being terdentate with an NNP donor set. The complex [Ni(NOAs2)l]BPh4 derived from the ligand NN-bis-(2-diphenylarsinoethyl)-2-methoxyethylamine (III; donor set NOAs2) is accorded a five-co-ordinate, ‘elongated’ square-pyramidal structure.