A High-Resolution Infrared Study of the ν9 + ν11 − ν11, ν10 + ν11 − ν11 Hot Band System in Allene

✍ Scribed by F. Hegelund; N. Andresen; M. Koivusaari

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 895 KB
• Volume: 159
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1993.1120

✦ Synopsis

The hot band system (\nu_{9}+\nu_{11}-\nu_{11}, \nu_{10}+\nu_{11}-\nu_{11}) in allene has been studied at a resolution of ca. (0.0030 \mathrm{~cm}^{-1}). The effect of rotational and vibrational (l)-type doublings has been analyzed in detail, and a number of vibrational and Coriolis type perturbations has been identified in these hot bands. From a simulianeous analysis of lower state combination differences formed from both of the hot bands a set of spectroscopic constants for the (\nu_{11}) level has been obtained. Using a model taking into account (/)-lype interactions, global (z)-Coriolis perturbation with (v_{10}+v_{11}), and local vibrational resonances with the (\nu_{2}, \nu_{7}), and (4 \nu_{11}) levels, spectroscopic constants have been obtained for the (v_{9}+v_{11}) level. A similar model accounting for local vibrational resonance with (\nu_{3}) and Coriolis interactions with (\nu_{9}) and (\nu_{4}+\nu_{11}) resulted in parameters for (\nu_{10}+\nu_{11}). These analyses also yielded a number of interaction constants and some parameters for the perturbing levels. ic. 1943 A Academic Press. Inc