Experimental and Theoretical Multiple Kinetic Isotope Effects for an SN2 Reaction. An Attempt to Determine Transition-State Structure and the Ability of Theoretical Methods to Predict Experimental Kinetic Isotope Effects
alpha-carbon kineticisotopeeffects (KIEs) and activation parameters have been measured for the S(N)2 reaction between tetrabutylammonium cyanide and ethyl chloride in DMSO at 30 degrees C. Then, thirty-nine readily available different theoretical methods, both including and excluding solvent, were used to calculate the structure of the transition state, the activation energy, and the kineticisotope effects
Distribution and Degradation of <sup>14</sup>C-Ethyl Prothiofos in a Potato Plant and the Effect of Processing
作者:H. Abdel-Gawad、L. M. Afifi、R. M. Abdel-Hameed、B. Hegazi
DOI:10.1080/10426500801977970
日期:2008.10.7
Prothiofos and some of its degradation products have been synthesized in our laboratory for investigation purposes. The residual fate of 14 C-ethyl prothiofos in different parts of potatoplant was studied. The highest level of insecticide residues was detected in and on the leaves of potatoplants. The residues of prothiofos insecticide were mainly located in the peels of potato tubers (peeling process