The infrared and microwave spectroscopy of the argon–propyne dimer

Autor:	Rainer D. Beck, Frank J. Lovas, Thomas A. Blake, Shao-Hui Tseng, David F. Eggers, R. O. Watts, R. P. Swift, Marius Lewerenz
Rok vydání:	1993
Předmět:	Infrared Chemistry Van der Waals molecule General Physics and Astronomy Infrared spectroscopy Rotational transition Bond length symbols.namesake Dipole Physics::Atomic and Molecular Clusters symbols Rotational spectroscopy Physical and Theoretical Chemistry van der Waals force Atomic physics
Zdroj:	The Journal of Chemical Physics. 98:6031-6043
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.464842
Popis:	Microwave and infrared measurements are reported for the van der Waals complex Ar–CH3CCH and its isotopomers. The structure is T shaped with equilibrium center‐of‐mass separation of 3.73 A and an angle of 82° 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−1.
Databáze:	OpenAIRE
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