kinetically. Over the pH range of 6.7–11.4, the α‐nucleophile (HA−) accelerates deacylation of PNPB and dephosphorylation of TRIS (in cetyltrimethylammonium bromide (CTAB) micelle, 2.0 × 10−3 M). The salicylhydroxamate ion encountered effective catalysis than AHA−, BHA−, and MBHA− ions. The monoanionic SHA− and dianionic SA2− forms of salicylhydroxamic acid are the reactive species. The hydroxamic acid concentration–dependent
异羟
肟酸的亲核反应性(HA - )结构RCONHO的离子- [R = CH 3(acetohydroxamate,AHA - ),C 6 H ^ 5(benzohydroxamate,
BHA - ),2--OHC 6 H ^ 4(
SAlicylhydroxamate,SHA - )和4-CH 3 OC 6 H ^ 4(4- methoxbenzohydroxamate,M
BHA -)]为
水解p
硝基苯基
苯甲酸酯(
PNPB),三(3-
硝基苯基)酯(TRIS)和
磷酸二(2,4-
二硝基苯基)(BDNPP)进行了动力学检查。在pH范围6.7-11.4,α-亲核试剂(HA - )加速时的脱酰
PNPB和去
磷酸化TRIS(在
十六烷基三甲基
溴(CTAB)胶束,2.0×10 -3 M)。所述
SAlicylhydroxamate离子遇到有效催化比AHA - ,
BHA - ,和M
BHA -离子。单阴离子SHA -和二阴离子
SA