Synthesis and characterization of thiolato-bridged cadmium(II) complexes with NNS-chelating thiolic ligands

Cadmium(II) complexes with 2-[(2-aminoethyl)amino]ethanethiol (HL1), 2-[(3-aminopropyl)amino]ethanethiol (HL2), 2-[(2-pyridylmethyl)amino]ethanethiol (HL3), and 2-[[2-(2-pyridyl)ethyl]amino]ethanethiol (HL4), [Cd(L1)](ClO4) (1), [Cd(L2)](ClO4)·1/2CH3OH (2), [Cd{Cd(L2)2}2](ClO4)2·CH3CON(CH3)2 (3a·CH3CON(CH3)2), [Cd{Cd(L2)2}2]Cl2·2CH3OH (3b·2CH3OH), [Cd{Cd(L3)2}2](ClO4)2 (4), [Cd(L4)](ClO4) (5), have been synthesized and characterized by measurements of the infrared and electronic spectra. The X-ray crystal structures show that 3a and 3b have a thiolato-bridged trinuclear core with a linear arrangement of three metal atoms.