摘要
The kinetics of the hydrolysis of p-nitrophenyl esters of three types of single-chain carbo- xylic acids, namely, saturated, olefinic and acetylenic, was investigated in two aquiorgano binary sol- vent systems, DMSO-H_2O and dioxane (DX)-H_2O. The ester probes used are: octanoie (C8), do- decanoic (C12), stearic (C18), oleic (C18-ol), elaidic (C18-el) and stearolic (C18-st). The order of measured CAgC values is: C18-ol>C18-el>C18>C18-st, whereas the order of decreasing magnitude of the observed hydrolytic rate constants of the monomeric species (km) is: C18 >C18-el>C18-ol> C18-st. These rather unanticipated results are discussed.
The kinetics of the hydrolysis of p-nitrophenyl esters of three types of single-chain carbo- xylic acids, namely, saturated, olefinic and acetylenic, was investigated in two aquiorgano binary sol- vent systems, DMSO-H_2O and dioxane (DX)-H_2O. The ester probes used are: octanoie (C8), do- decanoic (C12), stearic (C18), oleic (C18-ol), elaidic (C18-el) and stearolic (C18-st). The order of measured CAgC values is: C18-ol>C18-el>C18>C18-st, whereas the order of decreasing magnitude of the observed hydrolytic rate constants of the monomeric species (km) is: C18 >C18-el>C18-ol> C18-st. These rather unanticipated results are discussed.
基金
Project supported by the National Natural Science Foundation of China.
