Vibrational spectra and rotational isomerism of tripropargyl amine

The infrared spectra of tripropargyl amine were recorded from 250 to 4000 cm⁻¹ in the vapor, liquid and solid phases. The Raman spectrum of the liquid at room temperature was photoelectrically recorded and qualitative depolarization measurements were made. A comparative study of the infrared spectra in the fluid phase and in various solvents with that in solid phase reveals the existence of rotational isomers in the liquid and vapor phases. Various possibilities for rotational isomers with different point group symmetries are discussed.