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Microwave spectrum, centrifugal distortion, substitution structure, and dipole moment of sulfine, CH2SO

1976; Elsevier BV; Volume: 61; Issue: 1 Linguagem: Inglês

10.1016/0022-2852(76)90378-7

1096-083X

Robert Penn, Robert J. Olsen,

Atmospheric Ozone and Climate

The microwave spectrum of the reactive species sulfine (CH2SO) has been studied. Assignments of 86 transitions of the ground vibrational state normal isotopic species, with J up to 60, have allowed a thorough centrifugal distortion analysis. With planarity implied by the Ic-Ia-Ib value of 0.1333 amu Å2, spectral assignments of seven other isotopic modifications have resulted in the following substitution bond lengths and angles: CHsyn = 1.085 Å, CHanti = 1.077 Å, CS = 1.610 Å, SO = 1.469 Å, ⦠HCH = 121.86°, ⦠SCHsyn = 122.51°, ⦠SCHanti = 115.63°, and ⦠CSO = 122.51°. From Stark effect measurements of the normal and d2 species, the dipole moment has been determined to be 2.994 D, oriented 25.50° relative to the SO bond and 9.61° relative to the normal species “a” axis. At an initial pressure of 30 mTorr in a clean brass waveguide, the lifetime of sulfine at 25°C is ∼30 min.