In:
Australian Journal of Chemistry, CSIRO Publishing, Vol. 30, No. 2 ( 1977), p. 325-
Abstract:
The kinetics of the
oxidation of benzhydrol (diphenylmethanol) and several of its substituents by chromium(VI) oxide in aqueous acetic acid have been studied in detail. The rate
of oxidation is expressed as ��������������������� v = k3[ArAr'CHOH][CrVI] [H+]2 The effect of ring substituents
on the rate gives a p+ value of -0.546 (r = 0.959) pointing to the development of an electron-deficient centre in the transition state. The
oxidation of benzhydrol[α-D] proceeds 6.5 times slower than that of its
protio analogue at 55°C. From the Arrhenius plots, activation parameters have beep evaluated and the isokinetic relationship has been analysed. The results
are discussed in terms of a mechanism involving a rate-determining loss of hydride ion from the α-carbon of benzhydroxy chromate ester.
Type of Medium:
Online Resource
ISSN:
0004-9425
Language:
English
Publisher:
CSIRO Publishing
Publication Date:
1977
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