Photoelectron, infrared, and theoretical study of the thermolysis of 4-azahepta-1,6-diyne: spectra of prop-2-ynylideneamine, H–CC–CHNH, and penta-3,4-diene-1-yne, CH2CCHCCH
Abstract
The conditions for and products of thermolysis of 4-azahepta-1,6-diyne, (HCC–CH2)2NH, have been investigated by microwave, photoelectron, i.r., and mass spectrometric techniques. Prop-2-ynylideneamine, HCC–CHNH, is produced in good yield as well as penta-3,4-diene-1-yne, CH2CCH–CCH, from (HCC–CH2)2NH. Ionisation potential and vibrational data for HCC–CHNH, CH2CCH–CCH, and the precursors have been obtained. The ionisation energies have been assigned with the aid of theoretical calculations. Photoelectron data on 3-aminopropyne, HCCCH2NH2, have also been obtained.