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3 Polish Journal of Chemistry

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Kinetic Studies on Formation of Heterobimetallic Complexes Between Some Chromium(III) Bipyridine Species and Hexacyanoferrates(II)

Topolski A., Marai H., Chatłas J., Kita P.

Polish Journal of Chemistry

2006

Vol. 80, nr 3

503-508

KInetic Studies on Mechanism of Electron Transfer Between Cr2+(aq) and [Cr(bpy)3]3+ - Ions

Chatłas J., Katafias A., Kita P.

Polish Journal of Chemistry

2001

Vol. 75, nr 2

293-298

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

Chatłas J., Danilczuk E., Nasiadko M.

Polish Journal of Chemistry

1998

Vol. 72, nr 4

777-785

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.