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Kinetic and Mechanistic Studies on the Interaction of Adenosine with Diaquaethylenediamineplatinum(II) Ion

  • S. Ghosh , G.S. De and A.K. Ghosh
Published/Copyright: July 1, 1999
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Abstract

The kinetics of the interaction of adenosine with [Pt(en)(H2O)2]2+ has been studied spectrophotometrically as a function of [Pt(en)(H2O)2+], [Adenosine] and temperature at a particular pH (4.0) where the substrate complex exists predominantly as the diaqua species and the ligand adenosine as a neutral molecule. The interaction reaction shows distinct two step consecutive process; the first step is the ligand assisted anation and the second step is the chelation step. The activation parameters for both the steps are calculated (Δ H1 = 63.7 ± 1.6 kJ mol-1 ΔS1 = - 58± 5 JK -1 mol -1 and Δ H2 = 41.0 ± 0.5 kj mol -1 ΔS2 = 197 ± 1.5 JK1 mol-1 ).

Published Online: 1999-7-1
Published in Print: 1999-7-1

© 2014 by Walter de Gruyter Berlin/Boston

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