THE INFRARED ABSORPTION OF $HOC_{2}$$H_{4}$ IN SOLID ARGON
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Date
1992
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Ohio State University
Abstract
The infrared absorption of $HOC_{2}$$H_{4}$ has been recorded after UV photolysis of an argon matrix containing C $HOC_{2}$$H_{4}$ and $H_{2}$$O_{2}$. The matrix was formed by codeposition of gaseous mixtures of $C_{2}$$H_{4}$/Ar (1/100) and $H_{2}$$O_{2}$/Ar(1/250). Various protolytic sources were used to photolyze the matrix; the KrF excimer laser (248nm) produced the best spectrum of $HOC_{2}$$H_{4}$. Absorption lines at 3452.1 (OH-stretching), 3010.7, 2931.1, 2881.3, 2841.2 (all $CH_{2}$-stretching), 1354.2 ($CH_{2}$-waging), 1120.3 ($OCH_{2}$-deformation), 1040.1 (CO-stretching), 879.1, 808.9 ($CH_{2}$-rocking) $cm^{-1}$ have been assigned to $HOC_{2}$$H_{4}$ on the basis of $^{13}C-$ and $^{2}H$-isotopic shifts. The results are in agreement with recent ab initio calculations by Sosa and $Schlegel^{1,2}$ if the theoretically predicted frequencies are decreased by 13\%. The observed absorption lines are also consistent with those reported for the similar radical $FC_{2}H_{4}$.$^{3}$.
Description
1. C. Sosa and H.B. Schlegel, J. Am. Chem. Soc. 109, 7007 (1987). 2. C. Sosa and H.B. Schlegel, J. Am. Chem. Soc. 109, 4193 (1987). 3. M.E. Jacox, Chem. Phys. 58, 289 (1981).
Author Institution: Department of Chemistry, National Tsing Hua University
Author Institution: Department of Chemistry, National Tsing Hua University