The slowdown of fast proton exchanges and the1h and1h-14n NMR spectra of hydrazine and its methyl derivatives

Abstract

1. A method was proposed for slowing down rapid proton exchanges in hydrazine and its derivatives. 2. The parameters of the1H and1H-14N NMR spectra of hydrazine, monomethylhydrazine, and nonsymmetrical dimethylhydrazine, thoroughly freed of ions that catalyze proton exchanges, were determined. 3. Proton exchanges in nonsymmetrical dimethylhydrazine, hydrazine, and monomethylhydrazine become slow in the NMR time scale at a hydrozonium ion concentration of ∼10−5, 10−8, and 10−8 M, respectively; the rate constants of proton exchanges in the indicated hydrazines were determined.