The methanolysis kinetics and dissociation constants of 1-(subst. benzoyl)-3-phenylthioureas

J Kaválek, J Jirman, V Macháček…

Index: Kavalek, Jaromir; Jirman, Josef; Machacek, Vladimir; Sterba, Vojeslav Collection of Czechoslovak Chemical Communications, 1988 , vol. 53, # 3 p. 593 - 600

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Abstract

Abstract A series of seven 1-(subst. benzoyl)-3-phenylthioureas have been prepared and their dissociation constants and solvolysis rate constants have been measured in methanol at 25 C. The reaction constants found show that the solvolysis rate is limited by the attack of methoxide ion on the benzoyl carbonyl group of the non-dissociated substrate. The polar effect of substituents in benzoyl group is extensively transferred also by the intramolecular ...