Fourier transform infrared study of tricarbon hydride radicals trapped in Ar at 10 K

Abstract
The vibrational spectra of tricarbon hydride radicals formed by trapping the products of the vacuum ultraviolet photolysis of methylacetylene and various deuterated isotopomers in argon at 10 K have been investigated by Fourier transform spectroscopy in the range 200–3400 cm−1. Supplementary studies have examined the photolysis products of allene as well as C3H6 and C3D6, cyclopropane. The results reveal new information on the vibrations of C3H; five C3H2 isomers, cyclopropenylidene, vinylidenecarbene, triplet propargylene, trans- and cis-propenediylidene; two C3H3 isomers, propargyl and cyclopropenyl; and C3H5, allyl.