R. Uma et M. Palaniandavar, COPPER(II)-DISULFIDE INTERACTION IN COPPER-COMPLEXES CONTAINING SALICYLALDIMINE AND PYRIDYLALDIMINE LIGANDS - SYNTHESIS, SPECTRA AND REDOX BEHAVIOR, Transition metal chemistry, 18(6), 1993, pp. 629-634
Copper(II) complexes of Schiff base ligands formed by the condensation
of cystamine (cys) or 2,2'-diaminodiphenyldisulphide (ddds) with sali
cylaldehyde (sal) or pyridine-2-carboxaldehyde (pal), and also their C
=N reduced analogues, have been isolated and characterised. The e.p.r.
spectra of the complexes reveal a d(x)2(-y)2 ground state and exhibit
low A(parallel to) and g(parallel to) values. The spectral results su
ggest equatorial coordination of disulphide in a square-based geometry
. The pi-delocalisation, unsaturation and flexibility in the ligands a
ffect the ligand field, charge transfer and e.p.r. spectral parameters
as well as the redox behaviour.