Fourier Transform Spectroscopy of the ν3and ν6Bands of D3Si35Cl: Rovibrational Constants of thev= 0,v3= 1, andv6= 1 States

Abstract

The ν3and ν6infrared bands near 500 cm−1of monoisotopic D3Si35Cl have been studied with a resolution of 3.3 × 10−3cm−1. More than 800 transitions of ν3and 2600 of ν6have been assigned and fitted to ground and excited state parameters, ς(Fit) = 2.93 × 10−4cm−1. Ground state parameters up to quartic terms have been obtained. The excited state model includedl(2, 2) andl(2, −1) interactions within ν6and Coriolisx,yresonance between ν3and ν6, interaction parameters being determined with high significance in all cases. The band centers νowere determined, ν3= 538.502 cm−1and ν6= 491.260 cm−1. Excellent agreement of experimental parameters with those from theab initioharmonic and anharmonic force fields is noted. The transition moment ratio, ‖μ3:μ6‖ = 1:0.6(1), was determined by band contour simulation.