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Base hydrolysis ofcis-dichlorobis(1,2-diaminoethane),cis-α-dichloro(1,8-diamino-3,6-diazaoctane) andcis-α-chlorohydroxo-(1,8-diamino-3,6-diazaoctane) ruthenium(III) complexes

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Summary

The kinetics of base hydrolysis ofcis-[RuCl2(en)2]+ (en=1,2-diaminoethane),cis-α-[RuCl2(trien)]+ andcis-α-[RuCl(OH)(trien)]2+ (trien=1,8-diamino-3,6-diazaoctane) have been studied. All the reactions are fast and obey the second-order rate law,-d[complex]/dt=k[OH−][complex], with complete retention of configuration. A conjugate base mechanism involving a squarepyramidal intermediate is suggested. The Arrhenius parameters and rate constants found are respectively: ΔH≠ 14.2±0.5, 7.2±0.1, 10.9±0.1 M cal mol−1; ΔS≠ 1.3, 29, 22 cal deg−1 mol; log A 13.5, 6.9, 8.6 kOH 533 (27.2°C) 14.5 (24.4° C) 1.65 (25°C) M−1s−1.

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Author notes

  1. Nishat A. Pasha

    Present address: Department of Chemistry, Dhaka University, Dhaka-2, Bangladesh

Authors and Affiliations

  1. Chemistry Department, Faculty of Science, Australian National University, 2601, Canberra, ACT, Australia

    John A. Broomhead & Nishat A. Pasha

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  1. John A. Broomhead
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  2. Nishat A. Pasha
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Broomhead, J.A., Pasha, N.A. Base hydrolysis ofcis-dichlorobis(1,2-diaminoethane),cis-α-dichloro(1,8-diamino-3,6-diazaoctane) andcis-α-chlorohydroxo-(1,8-diamino-3,6-diazaoctane) ruthenium(III) complexes. Transition Met. Chem. 17, 209–211 (1992). https://doi.org/10.1007/BF02910838

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