SYNTHESIS OF NEW MONOMERIC PD(III) AND DIMERIC (PD(III),PD(II)) COMPLEXES WITH BIURET FORMED IN BASIC MEDIUM

摘要

New monomeric Pd(III) and dimeric (Pd(III)-Pd(II)) paramagnetic complexes with biuret (BiuH(2)) were synthesized and their structures and coordination modes studied using magnetochemical and spectroscopic (EPR, LR, ESCA) methods. For the monomeric species a metal to ligand ratio 1:2 was found and for the dimeric one it was 2:3. A distorted rhombic structure was suggested for the [Pd(III)(Biu)(2)] species. For the dimeric complex it was accepted that one of the biuret molecules is serving as bridging ligand coordinated via both NH-groups to one of the palladium ions and via both C = O groups to the other. A distorted rhombic structure is suggested for each of the palladium ions. [References: 19]