Biliverdinate dimethylester metal(II) compounds, [MII(BVDME)] (M = MnII, CoII, CuII, ZnII) have been characterized by their electronic and magnetic properties. ESR parameters of cobalt and copper compounds are in agreement with a planar structure of coordinated biliverdinate dianion, and the ground state configurations of metals are respectively (xz or yz)2(yz or xz)(x2-y2)2(z2)2 and (xz)2(yz)2 (x2-y2)2(z2)2(xy). These configurations well explain the presence of a radicalic species formulated as biliverdinate dimethylester cobalt(III) radical anion, [CoIII(BVDME)]., beside the corresponding cobalt(II) compound, [CoII(BVDME)]. The preparation method or the interaction with a solvent can make variations in the amount of the radicalic form [CoIII(BVDME)].; dilution by [ZnII(BVDME)] or the presence of base donor solvent (pyridine) completely removes the interaction between Co(III) and (BVDME).. A comparison between [CoII(BVDME)] and the cobalt oxygen carriers compounds usually employed as models of the heme proteins leads to conclude that [CoII(BVDME)] does not reduce O2 to O-2, probably because the electron transfer to BVDME ligand successfully competes with that to the O2 molecule. © 1983.
Electronic and magnetic properties of biliverdinate dimethylester metal(II) compounds([MII(BVDME)] (M = MnII, CoII, CuII, ZnII) / T. Beringhelli, F. Morazzoni, P. Manitto, D. Monti. - In: SPECTROCHIMICA ACTA. PART A, MOLECULAR SPECTROSCOPY. - ISSN 0584-8539. - 39:9(1983), pp. 751-759.
|Titolo:||Electronic and magnetic properties of biliverdinate dimethylester metal(II) compounds([MII(BVDME)] (M = MnII, CoII, CuII, ZnII)|
BERINGHELLI, TIZIANA (Primo)
MANITTO, PAOLO MARIO (Penultimo)
|Settore Scientifico Disciplinare:||Settore CHIM/03 - Chimica Generale e Inorganica|
|Data di pubblicazione:||1983|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/0584-8539(83)80013-0|
|Appare nelle tipologie:||01 - Articolo su periodico|