Investigation of the ro-vibrational energy structure of (0101, F1) and (0101, F2) states of the 28SiH4 molecule

Resumo

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 J_max = 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 d_rms = 8 × 10^–4 cm^–1.