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The microwave spectrum, substitution structure, and dipole moment of thioketen, H2CCS

1979; Elsevier BV; Volume: 77; Issue: 3 Linguagem: Inglês

10.1016/0022-2852(79)90178-4

1096-083X

Krini Georgiou, Harold W. Kroto, B.M. Landsberg,

Atmospheric Ozone and Climate

The microwave spectrum of the unstable thiocarbonyl thioketen, H2CCS, has been investigated in the region 26.5–40 GHz. All singly substituted species as well as D2CCS have been studied and the derived rotational constants yield the following structural parameters: rs(CS) = 1.554 ± 0.003 Å, rs(CC) = 1.314 ± 0.003 Å, rs(CH) = 1.090 ± 0.006 Å, ∠s(HCH) = 120.3 ± 0.5°. The dipole moment is μ = 1.02 ± 0.01 D. Four low frequency vibrational modes have been observed and their assignments are discussed.