Abstract
An analysis of the high-resolution vibrational-rotational IR spectrum of ν2 + ν4 (F1) and ν2 + ν4 (F2) bending absorption bands of the 28SiH4 molecule is carried out for the first time using the SPHETOM software. Approximately 618 experimental transitions with Jmax = 8 are assigned to ν2 + ν4 (F1) and ν2 + ν4 (F2) bands. Rotational, centrifugal distortion, tetrahedral splitting, and resonance interaction parameters for these vibrational bands are derived from the weighted fit of experimental line positions. The set of parameters obtained reproduces the initial experimental data with an accuracy close to the experimental uncertainties drms = 8 × 10–4 cm–1.
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