OBSERVATION OF A C=C STRETCHING FUNDAMENTAL FOR $C_{6}H$ IN SOLID Ar
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Date
1991
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Ohio State University
Abstract
A vibration of the $C_{6}H$ (hexatriynyl) radical has been identified for the first time at $1953.4 cm^{-1}$ in the Fourier transform infrared spectrum of the vacuum ultraviolet photolysis products of acetylene and 1,3-butadiene trapped in Ar at 10 K. The spectra for various D and $^{13}C$ isotopomers of $C_{6}H$ produced from isotopically substituted precursors have been observed. The complex, overlapping spectra resulting from partial $^{13}C$ substitutions have been fitted using force constant adjustment calculations, and confirm the assignment of the new band as a C=C stretching fundamental of $C_{6}H$, for which a rotational spectrum has been observed in a stellar {atmosphere}$^{1}$ and in the {laboratory}$^{2}$.
Description
$^{1}$H. Suzuki, M. Ohishi, N. Kaifu, S. Saito, and K. Kawaguchi, Publ. Astron. Soc. Japan, 3B, 911 (1986). $^{2}$J.C. Pearson, C.A. Gottlieb, D.R. Woodward, and P. Thaddeus, Astron. Astrophys, 189, L1 (1987).""
Author Institution: Department of Physics, Texas Christian University; Chemical Engineering, Box 2159, Yale University
Author Institution: Department of Physics, Texas Christian University; Chemical Engineering, Box 2159, Yale University