Nucleophilic Substitution Reactions of O-Methyl N,N-Diisopropylamino Phosphonochloridothioate with Anilines and Pyridines

E-mail: hwlee@inha.ac.krReceived November 22, 2013, Accepted December 5, 2013The kinetic studies on the reactions of O-methyl N,N-diisopropylamino phosphonochloridothioate with X-anilines and X-pyridines have been carried out in acetonitrile. The free energy relationship with X in theanilines exhibits biphasic concave upwards with a break region between X = (H and 4-F), giving unusualnegative β