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Mid-Infrared Diode Laser Spectroscopy ofX̃1A′ HC35Cl

✍ Scribed by Bor-Chen Chang; Ruian Fei; Trevor J. Sears

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
168 KB
Volume
183
Category
Article
ISSN
0022-2852

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✦ Synopsis

The observation of the C-Cl stretching fundamental of HC 35 Cl in its ground X ˜1A state is reported. HCCl was formed in a continuous flow system by the excimer laser photolysis of CHBr 2 Cl at 193 nm and the transient absorption recorded by infrared diode laser spectroscopy. The band has a-type character and the fundamental vibrational frequency is found to be 811.5963 cm 01 . No evidence was found for perturbations in either the ground or vibrationally excited states, implying that the excited triplet a ˜3AЉ states lies above the C-Cl stretching level in HCCl. The observed rotationvibration transitions were well fit by a standard asymmetric rotor Hamiltonian. There is a decrease in the A rotational constant on vibrational excitation, suggesting that some bend-C-Cl stretch coupling is present.

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