Syntheses and characterization of some homoleptic (1,1-dithiolato)copper(II) and nickel(II) complexes, and mixed-ligand (1,1-dithiolato)nickel(II) chelates containing nitrogenous bases. Crystal structures of tetrabutylammonium(1-cyano-1-chlorophenyl-2,2-ethylenedithiolato)copper(II), [(2,2′-bipyridine)(1-cyano-1-phenyl-2,2-ethylenedithiolato)nickel(II)], and 5-amino-4-(4-chlorophenyl)-[1,2]dithiole-3-thione

摘要: Abstract A series of divalent nickel and copper complexes a mixed-ligand nickel(II) chelates have been prepared characterized. The general formula the is [cation]2[M(1,1-dithiolate)2] (M = Ni(II), Cu(II)), that [Ni(enR)(SS)], containing dianion 1,1-dithiolate derivatives an N-alkyl- or N-phenyl-substituted 1,2-diaminoethane bidentate nitrogenous base, enR. structures complexes, both in solid state solution, determined by IR, UV-Vis, room temperature magnetic electrical conductance measurements. MS4 chromophoric group common to all homoleptic contains two four-membered chelate rings. MS2N2 complexes. are substituted isomaleonitriles Y ( CN ) C CS 2 - , where Y = CONH2 (1-cyano-1-carboamido-2,2-ethylenedithiolate, CCED); COOEt (1-cyano-1-carboethoxy-2,2-ethylenedithiolate, CED); ph (1-cyano-1-phenyl-2,2-ethylenedithiolato, CPD) Cl-ph (1-cyano-1-chlorophenyl-2,2-ethylenedithiolate, CCPD). X-ray structural analyses were performed for three compounds. tetrabutylammonium(1-cyano-1-chlorophenyl-2,2-ethylenedithiolato)copper(II) complex consists molecules per unit cell. atom lies on crystallographic center symmetry which requires CuS4 be planar. average Cu–S bond length 2.204 A. In cell [(2,2′-bipyridine)(1-cyano-1-phenyl-2,2-ethylenedithiolato)nickel(II)] there six atoms. immediate vicinity each exist sulfur and, at shorter distance, nitrogen arranged pairs, pair forming weak intermolecular Ni⋯S interactions distance 3.617 A. novel sulfur-rich ligand 5-amino-4-(4-chlorophenyl)-[1,2]dithiole-3-thione, carbon atoms linked with five-membered ring. All observed intramolecular lengths ring indicate delocalization π-electron system.