Microwave spectrum, ground state structure and dipole moment of thioformaldehyde.
Abstract
The microwave spectrum of the reactive species thioformaldehyde (H 2CS) has been studied in the ground vibrational state. Rotational transitions in H 212C 32S, H 213C 32S, H 212C 34S, and D 212C 32S have been measured and assigned. A detailed centrifugal distortion analysis has been carried out on the species H 212C 32S with a total of 27 transitions up to J = 27 fit to a standard deviation of 26 kHz. Rotational constants obtained from these four isotopic species have been used to obtain the following completely substituted structure: r SC = 1.6108(9) Å, r CH = 1.0925(9) Å, and <HCH = 116.87(5)°. The dipole moment of H 2CS was found to be μ = 1.6474(14) Debye from Stark effect measurements on the J = 1 01 ← 0 00 transition. The typical reactive half-life of this new species was found to be about 6 min in a static system.
- Publication:
-
Journal of Molecular Spectroscopy
- Pub Date:
- 1971
- DOI:
- 10.1016/0022-2852(71)90284-0
- Bibcode:
- 1971JMoSp..39..136J