Kinetics of the metal-exchange reaction of deuteroporphyrin and gematoporphyrin cadmium complexes with cobalt chloride in acetonitrile
摘要:
The metal-exchange reaction of cadmium deuteroporphyrin (CdDP) and cadmium gematoporphyrin (CdGP) with cobalt chloride in acetonitrile is studied spectrophotometrically. The stoichiometry of the metal-exchange reaction is determined. The results are compared with the exchange reaction of cadmium mesoporphyrin and cadmium protoporphyrin with cobalt acetate in acetonitrile. Substituents in the 2,4-positions of cadmium complexes of protoporphyrins are shown to influence the rate of the metal-exchange reaction. The increasing order of the rates of the metal-exchange reaction between protoporphyrins and cobalt chloride in acetonitrile is established.
Cadmium(II) for zinc(II) exchange reactions in deutero- and hematoporphyrin complexes in dimethyl sulfoxide
作者:S. V. Zvezdina、E. V. Kozgova、M. B. Berezin、B. D. Berezin
DOI:10.1134/s0036023607090197
日期:2007.9
The metal-exchange reaction between Cd-deuteroporphyrin or Cd-ematoporphyrin and ZnCl2 in dimethyl sulfoxide (DMSO) was studied spectrophotometrically. The order and activation parameters of the reaction of Cd2+ replacement by zinc ions were calculated. A mechanism of this reaction is suggested. The results are compared with the available data on metal-exchange reactions between Cd-mesoporphyrin and Cdprotoporphyrin and ZnCl2 in DMSO.