Sulphur-nitrogen chelating agents. V. Complexes of 2-Methyl-8-methylthioquinoline with some transition metals: The occurrence of tetrahedral complexes of cobalt(II), nickel(II), and copper(II)

Abstract

Complexes of 2-methyl-8-methylthioquinoline (mmtq) have been obtained with cobalt(11), nicke1(11), palladium(11), platinum(11), copper(1), copper(11), silver(1), and gold(111). The 2-methyl group of mmtq causes severe steric hindrance to other ligands in a square plane. The complex AuCl₃ mmtq contains five-coordinate gold(111). Only one bis-chelated complex, Pd mrntq₂(ClO₄)₂,H₂O, was isolated and it is possible that the metal atom in this complex is five-coordinate also. The solid reflectance spectra of the compounds MX₂ mmtq (M = Co, Ni, Cu; X = Cl, Br) and CoI₂ mmtq indicate a pseudo-tetrahedral configuration about the metal atom in these complexes.