OSU Navigation Bar

The Ohio State University University Libraries Knowledge Bank

The Knowledge Bank is scheduled for regular maintenance on Sunday, April 20th, 8:00 am to 12:00 pm EDT. During this time users will not be able to register, login, or submit content.

MICROWAVE ROTATIONAL SPECTRA OF THE $Ar-C_{2}H_{4}$ and $Ne-C_{2}H_{4}$ VAN DER WAALS DIMERS

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/19546

Show full item record

Files Size Format View
1999-WF-06.jpg 103.3Kb JPEG image Thumbnail of MICROWAVE ROTATIONAL SPECTRA OF THE $Ar-C_{2}H_{4}$ and $Ne-C_{2}H_{4}$ VAN DER WAALS DIMERS

Title: MICROWAVE ROTATIONAL SPECTRA OF THE $Ar-C_{2}H_{4}$ and $Ne-C_{2}H_{4}$ VAN DER WAALS DIMERS
Creators: Liu, Yaqian; Jäger, Wolfgang
Issue Date: 1999
Abstract: Rotational spectra of various isotopomers of the $Ar-C_{2}H_{4}$ and $Ne-C_{2}H_{4}$ van der Waals dimers were measured in the frequency range from 3.5 to 22 GHz using a pulsed jet cavity Fourier transform microwave spectrometer. The observed transitions are all of a-type. The observed spectra are consistent with planar, T-shaped equilibrium geometries. Tunneling splittings were observed for all transitions. This is attributed to an internal rotation motion of the ethylene unit within the complex. $Ne-C_{2}H_{4}$ shows a larger tunneling splitting than $Ar-C_{2}H_{4}$, which can be attributed to a lower tunneling barrier in the $Ne-C_{2}H_{4}$ case. Molecular symmetry group analyses using nuclear permutation inversion group theory can explain teh observed intensity variation and the absence of certain transitions. Effective separations beteen the center-of-mass of ethylene and the rare gas atoms were obtained from the ground state rotational constants. ab initio calculations at the MP4 level were carried out on $Ne-C_{2}H_{4}$, and the results were compared with those from the experiments.
URI: http://hdl.handle.net/1811/19546
Other Identifiers: 1999-WF-06
Bookmark and Share