摘要

B3LYP. CCSD, and QCISD geometry optimization and harmonic vibrational frequency calculations were performed on the X(2)A(1) state of SO2 divided by and X(1)A(1) state of SO2. Spectral simulations were carried out on the first photoelectron band of SO2. The geometric parameters of SO2 (X(2)A(1)) were obtained: R-e(O-S) = 0. 1420 +/- 0.0003 nm and theta(e)(O-S-O) = 132.80 +/- 0.05 degrees, in the spectral simulation.