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- W1992312551 abstract "Abstract The microwave spectrum of propionyl chloride has been investigated in the region 18.0–40.0 GHz, and transitions due to a cis conformer have been assigned. This form has a heavy atom planar configuration and the methyl group and the carbonyl oxygen atom are cis to each other. Using the substitution structures of propionic acid and acetyl chloride as molecular models for the propionyl chloride molecule, good agreement is found between observed and calculateo effective rotational constants. For the 35Cl species satellite spectra assigned to the first four excited states of the C-C torsional mode have been observed together with the first excited state of the methyl torsional mode. The ground state spectrum has also been assigned for the 37Cl species. Relative intensity measurements yielded the lowest C-C torsional vibration frequency of 86 ± 10 cm−1. The CH3 internal rotation frequency was found to be 197 cm−1. Nuclear quadrupole coupling constants were determined for the ground state of the 35Cl and 37Cl species. From observed A-E splittings of bQ-branch transitions of the first excited state of the methyl torsional mode a barrier to internal rotation was estimated to be V3 = 2480 ± 40 cal mol−1 (867 ± 14 cm−1)." @default.
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- W1992312551 date "1976-08-01" @default.
- W1992312551 modified "2023-09-25" @default.
- W1992312551 title "Microwave spectrum of propionyl chloride" @default.
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- W1992312551 doi "https://doi.org/10.1016/0022-2860(76)85086-7" @default.
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