The ν6, ν8 3ν4+ν12 infrared system of Si2H6 under high resolution: rotational and torsional analysis
| Autor: | F. Lattanzi, Veli-Matti Horneman, C. Di Lauro |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Coupling
Infrared Resolution (electron density) Biophysics Analytical chemistry State (functional analysis) Condensed Matter Physics symbols.namesake chemistry.chemical_compound Fourier transform chemistry symbols Disilane Physical and Theoretical Chemistry Atomic physics Ground state Molecular Biology Doppler effect |
| Zdroj: | Molecular Physics. 101:2895-2906 |
| ISSN: | 1362-3028 0026-8976 |
| DOI: | 10.1080/00268970310001598722 |
| Popis: | A Fourier transform infrared spectrum of disilane has been measured at a Doppler limited resolution, and analysed in the region of the ν6 and ν8 fundamentals, from about 800 to 1020cm−1. The torsional splittings are not resolved in the ν6 band, showing that the splittings in the ν6 = 1 state and in the ground state are almost identical. The torsional splittings in the reasonably unperturbed regions of the ν8 fundamental are about 0.0146cm−1, and a detailed rotation-torsion analysis shows that the intrinsic splittings in the ν8 = 1 state are smaller than in the ground state by this amount. An intrinsic torsional splitting about 0.0150 cm−1 is estimated in the vibrational ground state and in the ν6 = 1 state, and almost vanishing in the ν8 = 1 state (about 0.0004cm−1), with a barrier height around 407cm−1. This is in agreement with the expectation from theory. The ν8 band, beyond a moderate x, y-Coriolis coupling with ν6, is affected by several perturbations, also selective in the torsional components. The ... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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