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Kinetics and mechanism of decarboxylation of aspartic acid with ninhydrin

✍ Scribed by Zaheer Zhan; Dileep Gupta; A. Aziz Khan

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
305 KB
Volume
24
Category
Article
ISSN
0538-8066

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✦ Synopsis

The kinetic study of the decarboxylation of aspartic acid has been carried out at various [ninhydrin], [H'] and at different temperature ranging from 60-95Β°C. The reaction follows an irreversible first-order reaction path under pseudo first-order kinetic conditions. The variation of pseudo first-order rate constant ( k d s ) with ninhydrin concentration was found to be in agreement with equation l/k.h = B, + B~/[Ninhydrin]. One mol of carbondioxide evolved from decarboxylation of a-COOH and second mol of carbondioxide comes from the decarboxylation of P-keto acid which is an intermediate and formed during the course of ninhydrin and aspartic acid reaction. On the basis of the observed data, a possible mechanism has been proposed.

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