Kinetics and mechanism of the acid-catalyzed hydrolysis of [carbonatotetra(1-methylimidazole)cobalt(III)](+) ion

• Autorzy: Chatłas J. , Danilczuk E. , Nasiadko M.
• Języki publikacji: EN

Abstrakty

EN

The kinetics of acod-catalyzed hydrolysis of the [Co(1-Meim)4(CO3)](+) ion follows the rate law -d ln[complex]/d t=k(1)K[H(+)]/(1 + K[H(+)]) (25:45 degree C, [H(+)]=0.05:1.0 M and I=1.0 M(NaClO4)). The reaction course consists of rapid pre-equilibrium protonation followed by a rate determining ring opening process and the subsequent fast relase of monodentate carbonato ligand. Kinetic parameters, k(1) and K, at 25 degree C are 5.1x 10(-3)s(-1) ans 0.48 M(-1) respectively, and activation parameters for k(1) are Delta H(1)=84.4+:-0.8kJ mol(-1) and DeltaS(1)=-5.8+:-3.7J mol(-1) K(-1). The hydrolysis rate increases with the ionic strengh. The results are compared with those for similar cobalt(III) complexes.

Słowa kluczowe

EN

kinetics; acid hydrolysis; complexes; cobalt(III); activation parameters

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 1998
• Tom: Vol. 72, nr 4
• Strony: 777--785
• Opis fizyczny: Bibliogr. 23 poz., tab., wykr.

Twórcy

autor

Chatłas J.

autor

Danilczuk E.

autor

Nasiadko M.

• Faculty of Chemistry Nicolaus Copernicus University 87-100 Toruń Poland