Gm. Mamardashvili et al., Reactions between chelate compound and macrocycles. Complexation of N-methyl-5,10,15,20-tetraphenylporphine with zinc dithizonate, RUSS J C CH, 25(4), 1999, pp. 249-252
Our systematic investigations into the kinetics of reactions of porphyrins
with metal chelate compounds were continued. It was shown that planar porph
yrins do not interact with metal dithizonates because of the rigid macrocyc
lic effect (MCE). N-Alkylporphyrins with a reduced MCE react with dithizona
tes of some metals with a measurable rate. The conditions for the occurrenc
e of the reaction between zinc dithizonate Zn(D-2)(2) and N-methyltetraphen
ylporphine in DMSO were studied. Kinetic parameters of the reaction were fo
und. The possible reaction mechanism is discussed.