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- W200501771 abstract "Abstract The microwave spectrum of methylphosphonic difluoride, CH3POF2 has been investigated in the region between 18.5 and 40.0 GHz. R-branch assignments have been made for the ground and two excited vibrational states for the a-type transitions. The rotational constants were found to be A = 4495.52 ± 0.04, B = 4271.84 ± 0.03 and C = 4125.93 ± 0.03 MHz The values of the dipole moment components were obtained from Stark splittings to be: ¦μa¦ = 3.4 ± 0.2; ¦μc¦ = 0.4 ± 0.5; and ¦μt¦ = 3.62 ± 0.2 D. The Raman spectra of CH3POF2 have been recorded in both the gas and solid phases and vibrational assignments are proposed for the fundamentals. The overtone and fundamental of the methyl torsion were observed in the Raman and IR spectra, respectively. The observed splitting from the microwave spectra of vibrationally excited states of the torsion led to the calculation of the barrier to internal rotation of 3.58 ± 0.04 kcal mol−1. This value is consistent with the torsional frequencies observed in the vibrational spectrum. This barrier value is compared to similar quantities in related molecules." @default.
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- W200501771 date "1976-09-01" @default.
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- W200501771 title "Spectra and structure of organophosphorus compounds" @default.
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- W200501771 doi "https://doi.org/10.1016/0022-2860(76)80075-0" @default.
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