The α-effect in micelles: Nucleophilic substitution reaction ofp-nitrophenyl acetate withN-phenylbenzohydroxamate ion
作者:Kallol K. Ghosh、Jyoti Vaidya、Manmohan Lal Satnami
DOI:10.1002/kin.20117
日期:2006.1
Pseudo-first-order rate constants have been determined for the nucleophilic substitution reactions of p-nitrophenyl acetate with p-chlorophenoxide (4-ClC6H4O−) and N-phenylbenzohydroxamate (C6H5CON(C6H5)O−) ions in phosphate buffer (pH 7.7) at 27°C. The effect of cationic, (CTAB, TTAB, DTAB), anionic (SDS), and nonionic (Brij-35) surfactants has been studied. The kobs value increases upon addition
在磷酸盐缓冲液 (pH 7.7) 中,对乙酸对硝基苯酯与对氯苯醚 (4-ClC6H4O-) 和 N-苯并异羟肟酸 (C6H5CON(C6H5)O-) 离子的亲核取代反应已确定了伪一级速率常数在 27°C。已经研究了阳离子(CTAB、TTAB、DTAB)、阴离子(SDS)和非离子(Brij-35)表面活性剂的作用。添加 CTAB 和 TTAB 后 kobs 值增加。DTAB和其他表面活性剂对反应的影响不是很显着。已经解释了异羟肟酸离子显示的胶束催化和α效应。© 2005 Wiley Periodicals, Inc. Int J Chem Kinet 38: 26–31, 2006