Abstract
The vibrational spectra and the harmonic force field for the stannane molecule has been calculated from ab initio SCF calculations using an effective core potential and two double-zeta basis sets for the valence electrons. Polarized functions and electron correlation effects on the calculated force constants and frequencies are analyzed carefully. At HF SCF level the calculated frequencies are higher than the experimental ones by about 8.15% while at second-order Møller-Plesset perturbation level, the mean absolute percentage deviation of the frequencies is found to be 3.75%. This mean absolute percentage deviation is notably improved at SDCI (3.2%) and SDQCI (2.2%) levels of theory. The integrated molar absorption coefficients and the scattering activities are calculated and their values agree reasonably with experiment.
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