OBSERVATION OF C-H and $C\equiv C$ STRETCHING VIBRATIONS OF THE C4H BUTADIYNYL RADICAL TRAPPED IN AN ARGON $MATRIX^{\dagger}$
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Date
1990
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Ohio State University
Abstract
An FTIR isotopic study of vacuum UV photolyzed diacetylene (C4H2), 1,3-butadiene (C4H6), and their various deuterated and carbon-13 substituted isotopomers has enabled the assignment of the $\nu_{1}, C-H$ stretching, and the $\nu_{2}, C \equiv C$ stretching vibrations, as well as confirmed the previous assignment of a band at $2060.5 cm^{-1}$ to $\nu_{3}$, the second $C \equiv C$ $vibration.^{1}$ Based on the isotopic data, a study of concentration effects, and the results of the calculations by the Wilson GF matrix technique, absorptions at $3307.4 cm^{-1}$ and $2083.9 cm^{-1}$ are identified as the $\nu_{1}$ and $\nu_{2}$ stretching vibrations of $C_{4}H$, respectively
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$^{\dagger}$ Work supported by the Welch Foundation (Grant P-0786) and the W.M. Keck Foundation $^{1}$ K.I. Dismuke, W.R.M. Graham, and W. Weltner, Jr., J. Mol. Spectrosc, 57, 127, (1975).
Author Institution: Department of Physics, Box 32915, Texas Christian University
Author Institution: Department of Physics, Box 32915, Texas Christian University