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Kinetics of substitution on chloro-1,1,7,7-tetraethyldiethylene-triaminegold(III) in methanol-water mixtures

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Summary

Rate constants are reported for the replacement of chloride by bromide in the complex [Au(Et4dien-H)+ in methanol-water mixtures. This reaction follows the usual two-term rate law = (kobs = k1 + K2[Br−1]) for square planar complexes in all the mixtures studied. The logarithms of the rate constants correlate with Grunwald-Winstein solvent Y values and yield slopes of 0.32 (k1) and 0.15 (k2). The results suggest that both reaction paths are associative.

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Authors and Affiliations

  1. Department of Physical Chemistry, University of Melbourne, 3052, Parkville, Victoria, Australia

    Roger D. Alexander & Paul N. Holper

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  1. Roger D. Alexander
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  2. Paul N. Holper
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Dien complexes of gold(III) yield conjugate base species at low pH; Et4dien-H = Et2NCH2CH2NCH2CH2NEt2.

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Alexander, R.D., Holper, P.N. Kinetics of substitution on chloro-1,1,7,7-tetraethyldiethylene-triaminegold(III) in methanol-water mixtures. Transition Met Chem 5, 108–110 (1980). https://doi.org/10.1007/BF01396883

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