INFRARED-SPECTRA OF THE NU-2 AND NU-16 BANDS IN THE METHYL STRETCH REGION OF JET-COOLED 1-BUTYNE

被引:9
作者
BETHARDY, GA
PERRY, DS
机构
[1] Department of Chemistry, University of Akron, Akron
关键词
D O I
10.1016/0022-2852(90)90216-D
中图分类号
O64 [物理化学(理论化学)、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号
070203 ; 070304 ; 081704 ; 1406 ;
摘要
Rotationally resolved infrared spectra of the ν2 and ν16 bands in the methyl stretch region of jet-cooled 1-butyne are reported at a resolution of 0.02 cm-1. Spectra at rotational temperatures of 1.8 and 4 K are assigned and fit to a rigid rotor Hamiltonian. For the a, b hybrid band ν2, we find the excited state constants (in cm-1), ν0 = 2989.4660(34), A′ = 0.8898(16), B′ = 0.1507(5), and C′ = 0.1365(2). For the c type band ν16, we find (in cm-1), ν0 = 2991.3962(46), A′ = 0.8997(8), B′ = 0.1508(7), and C′ = 0.1379(12). The quantities in parentheses are 2 SD in units of the last digits. Even at this resolution many of the lines appear as multiplets indicating substantial mixing with dark vibrational states. © 1990.
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页码:304 / 309
页数:6
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