Organic & biomolecular chemistry

Catalysis of the ethanolysis of aryl methyl phenyl phosphinate esters by alkali metal ions: transition state structures for uncatalyzed and metal ion-catalyzed reactions

I Onyido, K Albright, E Buncel

Index: Onyido, Ikenna; Albright, Kendall; Buncel, Erwin Organic and Biomolecular Chemistry, 2005 , vol. 3, # 8 p. 1468 - 1475

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Citation Number: 35

Abstract

This paper reports on a spectrophotometric kinetic study of the effects of the alkali metal ions Li+ and K+ on the ethanolysis of the aryl methyl phenyl phosphinate esters 3a–f in anhydrous ethanol at 25° C. Rate data obtained in the absence and presence of complexing agents afford the second-order rate constants for the reaction of free ethoxide (kEtO−) and metal ion-ethoxide ion pairs (kMOEt). The sequence kEtO−< kMOEt is established for all ...