HIGH-RESOLUTION INFRARED-SPECTRUM OF H3SII IN THE NU(1) NU(4) REGION NEAR 2200CM(-1)/

The Fourier transform infrared spectrum of H3SiI has been recorded in the v(1)/v(4) region from 2075 to 2315 cm(-1) at an optical resolution of 2.3 x 10(-3) cm(-1). The v(1)/v(4) fundamental bands and the (v(1) + v(3)) - v(3)/(v(4) + v(3)) - v(3) hot bands have been relationally investigated. Numerous local perturbations have been observed in the v , and v,bands and in the hot bands. Without the lines involved in pert urbations, more than 2900 transitions of the v(1)/v(4) bands were used to determine the band origins and the vibration-rotation parameters o f the v(1) = 1 and v(4) = 1 states. A least-squares fit of 766 apparen tly unperturbed transitions of the hot bands gave the parameters of th e v(1) = v(3) = 1 and v(4) = v(3) = 1 states. The l(2, 2) resonance in v(4)and the A(1)-E Coriolis coupling between v(1) and v(4) have been investigated. Most of the local perturbations have been studied indivi dually using a simple model by which the main perturber for each reson ance was identified, (C) 1998 Academic Press.