Synthesis, characterization and physicochemical studies of some Copper(II) tetrathiocyanato dithallate(I) complexes with hydrazides and hydrazones

Abstract

Copper(II) complexes of the type Cu[Tl(SCN2]2·L [where L = benzoic hydrazide (BH), isonicotinic hydrazide (INH), salicyclic hdyrazide (SH), anthranilic hydrazide (AH), p-hydroxybenzoic hydrazide (PHBH), p-aminobenzoic hydrazide (PABH) and their isopropanone derivatives, i.e. isopropanone benzoylhdyrazone (IBH), isopropanone isonicotinoyl hydrazone (IINH), isopropanone salicyloylhydrazone (ISH) and isopropanone anthranoylhydrazone (IAH)] were synthesized and characterized. All the complexes are non-electrolytes, and dissociate in H2O, C2H5OH, CH3CN and CH3COCH3. They are either coordinated through CO and NH2 groups of the hydrazide or CO and CN of the hydrazone ligands. The electronic and ESR spectra suggest a planar geometry for Cu[Tl(SCN2]2 and a tetragonally distorted octahedral structure for all other complexes. The X-ray diffraction parameters for some of the complexes correspond to a tetragonal crystal lattice. © 1994.