Microwave spectrum and barrier to internal rotation in Trifluoronitromethane
Handelman, Eileen Tannenbaum
Gwinn, William D.
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The microwave spectrum for CFaN02 has been observed for the J=1-+J =2 through the J =4--+J =5 transitions. Some 35 lines in these transitions are assigned, and the Stark effects for three of these were studied quantitatively and interpreted. A discrepancy in the Stark effect of a 4-+5 transition can be ac counted for by properly adjusting the sixfold barrier to internal rotation. The parameters used to obtain the best fit for the spectrum are the following: B+C=4917.4±0.4 Mc/sec, B-C=453.9±5 Mc/sec, A (N02) = 13205±150 Mc/sec, A (CFa) = 5700 Mc/sec (assumed), V6=780 000 Mc/sec= 74.4±5 cal/mole. The dipole moment obtained from the Stark-effect measurements is 1.44±0.03 D.
The article of record as published may be found at http://dx.doi.org/10.1063/1.1697269
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