Kinetics of ionization of nitromethane and phenylnitromethane by amines and carboxylate ions in Me2SO-water mixtures. Evidence of ammonium ion-nitronate ion hydrogen bonded complex formation in Me2SO-rich solvent mixtures
The nitro anomaly and Br�nsted ?nuc values inSN2 reactions on chlorine
作者:Linoam Eliad、Shmaryahu Hoz
DOI:10.1002/poc.482
日期:2002.8
The kinetics of chlorine transfer reactions between N-chlorosuccinimide (NCS) and four carbon nucleophiles (the conjugated bases of phenyldinitromethane, Meldrum's acid, phenylmalononitrile and phenylnitro-methane) in water were determined. A plot of log k for the SN2 reactions vs the pKa of the first three conjugated acids of the nucleophiles gave a straight line with a slope (βnuc) of 1.8. The data