New 2-pyridyl polyamines. Synthesis, spectra, and proton dissociation constants

Abstract

The synthesis of di-(2-pyridylmethyl)amine, 2-aminoethyl-(2-pyridylmethyl)amine, di-(2-2′-pyridylethyl)amine, 3-aminopropyl-(2-2′-pyridylethyl)amine, 2-2′-pyridylethyl-(2-pyridylmethyl)amine, and 3-aminopropyl-(2-pyridylmethyl)amine is described. Their infrared and n.m.r. spectral characteristics are described, and their trihydrochlorides and dipicrates have been prepared. The three proton dissociation constants have been rigorously determined in each case by potentiometric titration at 25° and µ 0·10 in potassium nitrate.