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Alkaline hydrolysis of Co(Asn)2 (Asn = l-asparagine)
Authors:Khan  Zaheer  Rafiquee  Mohammad Z A  Niaz  Mohammad A  Khan  Abdul Aziz  Kabir-ud-Din
Institution:(1) Chemistry Department, Jamia Millia Islamia, New Delhi, 110025, India;(2) Chemistry Department, Aligarh Muslim University, Aligarh, 202002, India
Abstract:The kinetics of alkaline hydrolysis of Co(Asn)2, yielding Co(OH)2, NH3 and aspartic acid, have been studied spectrophotometrically, and the effects of CoII and NaOH concentrations on the reaction rate determined. The rate increases with increasing NaOH], whereas variation of CoII] has no significant effect. The kinetics of NH3 evolution conform to the rate law:

$${\text{dNH}}_{\text{3}} {\text{]/d}}t = k_1^\prime k_2^\prime {\text{OH}}^ - ]{\text{Co(Asn)}}_{\text{2}} ]/(k_{ - 1}^\prime + k_2^\prime )$$
It is proposed that the reaction proceeds through formation of a dianionic tetrahedral intermediate.
Keywords:
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