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KMID : 1059519970410040198
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Journal of the Korean Chemical Society
1997 Volume.41 No. 4 p.198 ~ p.204
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Hydrolysis Mechanism of N-(2,4-dinitrophenyl)benzhydrazonyl Bromide Derivatives
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Park Chan-Il
Cha Ki-Won
Lee Ik-Choon
Chang Byung-Du
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Abstract
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The rate constants for the hydrolysis of N-(2,4-dinitrophenyl)benzhydrazonyl bromide and its derivatives were determined by ultraviolet visible spectrophotometry at 20℃ and a rate equation which could be applied over a wide pH range was obtained. On the basis of rate equations derived and judging from the solvent effect, substituent effect, salt effect, thermodynamic parameter, plausible mechanisms of hydrolysis have been proposed. It may be concluded that the hydrolysis through SN1 mechanism via carbonium ion intermdiate to pH 3.0, and pH 10.0, the hydrolysis proceeds through 1,3-dipolar or SN2 mechanism.
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KEYWORD
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