Signs of l-doubling constants in NF3

Stone, J. M. R. and Mills, I. (1970) Signs of l-doubling constants in NF3. Journal of Molecular Spectroscopy, 35 (3). pp. 354-358. ISSN 0022-2852 doi: 10.1016/0022-2852(70)90178-5

Abstract/Summary

Computed infrared band contours are presented for the two degenerate fundamentals of the NF3 molecule, using the l-resonance band contour program described by Cartwright and Mills, with values of the vibration-rotation constants determined from the microwave spectrum by Morino and co-workers. Computed contours are presented for both possible signs of the l-doubling constant, and comparison with the observed band contours leads to the conclusion that q3 = −121.4 MHz and q4 = +51.4 MHz.