FTIR study of tricarbon hydrides in solid argon at 10 K

Abstract

An FTIR study of tricarbon hydrides has been carried out by trapping the products of the vacuum uv photolysis of methylacetylene, allene, cyclopropane, and their deuterated precursors, in solid argon at 10 K. Stable, partially deuterated tricarbon hydride molecules have been identified, based on available matrix and gas phase data and by using the Wilson GF matrix method to determine the vibrations of partially deuterated isotomers of the molecules. The results reveal new information on the vibrations for 10 species of tricarbon hydrides, including two C$\sb3$H isomers, linear C$\sb3$H (propenylidyne) and cyclic C$\sb3$H; five C$\sb3$H$\sb2$ isomers, cyclopropenylidene, vinylidenecarbene, propargylene, trans-propenediylidene, and cis-propenediylidene; two C$\sb3$H$\sb3$ isomers, propargyl and cyclopropenyl; and one C$\sb3$H$\sb5$ isomer, allyl. (Abstract shortened with permission of author.)