Portal de Periódicos da CAPES

Studies on reactions of imidazole with a Cr(llI)-Porphyrin

1978; Elsevier BV; Volume: 26; Linguagem: Inglês

10.1016/s0020-1693(00)87201-1

1873-3255

M. Krishnamurthy,

Supramolecular Chemistry and Complexes

Dynamics of imidazole binding to tetra-p-sulfophenylporphinatochromium(III) have been investigated as a function of hydrogen ion concentration Labile substitution of imidazole at axial position is shown to be due to trans activation by the bound hydroxide ion. Rate of addition of a second dazole, to form a bis complex, was found to be slower than the substitution of the first imidazole. Neither imidazolium nor the anion of imidazole was found to react with the Cr(III) porphyrin.