Publication Date:
2019-07-13
Description:
Microwave and infrared measurements are reported for the van der Waals complex ArCH3CCH and its isotopomers. The structure is T-shaped with equilibrium center-of-mass separation of 3.73 A and an angle of 82 deg between the molecule symmetry axis and the van der Waals bond. The infrared and microwave spectra are complex due to the effects of a slightly hindered internal rotor. Analysis of the spectral data shows that the dipole moment is almost parallel to the dimer b axis. A modified vibration/rotation Hamiltonian that includes an internal rotor potential is used to show that the barrier to internal rotation is near 10.8/cm.
Keywords:
ATOMIC AND MOLECULAR PHYSICS
Type:
Journal of Chemical Physics (ISSN 0021-9606); 98; 8; p. 6031-6043.
Format:
text
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