Evidence of a stepwise acyl-transfer reaction mechanism: Nonlinear Hammett plots for reactions of p-nitrophenyl substituted benzoates with hydroxide and p-chlorophenoxide
作者:Ik-Hwan Um、Eun-Kyung Chung、Dong-Sook Kwon
DOI:10.1016/s0040-4039(97)01033-2
日期:1997.7
21∼2.44 to 1.45∼1.52 as the acyl substituent becomes a strong electron withdrawing group (σ >0.6). Such a break in the Hammett plots is suggestive of a change in the reaction mechanism and strong evidence of a stepwisemechanism for the acyl-transfer reaction.