The aminolysis of aryl diphenylphosphinates, p-nitrophenyl diphenylphosphinothionate,- phosphinothioate, and-phosphinodithioate by n-butylamine, by the secondary amines piperidine, pyrrolidine, morpholine, and dipropylamine, as well as by a series of diamines, has been studied in acetonitrile. The general reactivity order is diamines> butylamine> sec- amines. Butylaminolysis follows a two-term rate law, one first order in amine and the other ...