Kinetics and mechanism of nucleophilic addition to nitric oxide: secondary amine diazeniumdiolation.

The kinetics of nitric oxide (NO) addition to dipropylamine and pyrrolidine are determined for a range of solvents and NO pressures. A new isobaric technique is utilized to determine the order of NO, and the kinetics are shown to conform to reactions which are either mono- or bimolecular in NO depending upon the conditions. The mechanism is interpreted in terms of competitive addition of amine to either NO or its dimer.