Microwave spectrum of the argon-tropolone van der Waals complex

Wei Lin; Wallace C Pringle; Stewart E Novick; Thomas A Blake

doi:10.1021/jp901086a

Microwave spectrum of the argon-tropolone van der Waals complex

J Phys Chem A. 2009 Nov 26;113(47):13076-80. doi: 10.1021/jp901086a.

Authors

Wei Lin¹, Wallace C Pringle, Stewart E Novick, Thomas A Blake

Affiliation

¹ Department of Natural Sciences and Mathematics, University of Saint Mary, Leavenworth, Kansas 66048, USA.

PMID: 19441806
DOI: 10.1021/jp901086a

Abstract

The rotational spectrum of the argon-tropolone van der Waals complex in the ground vibrational state has been measured in the frequency range of 6-17 GHz using a pulsed-jet, Balle-Flygare-type Fourier transform microwave spectrometer. Eighty-six transitions for the complex (Ar-(12)C(7)H(6)(16)O(2)) were observed, assigned, and fit using a Watson A-reduction Hamiltonian giving the rotational and centrifugal distortion constants A = 1080.4365(3) MHz, B = 883.4943(3) MHz, C = 749.0571(2) MHz, Delta(J) = 2.591(2) kHz, Delta(JK) = -3.32(1) kHz, Delta(K) = 5.232(9) kHz, delta(J) = 0.944(1) kHz, and delta(K) = -0.028(8) kHz. The tunneling motion of the hydroxyl proton in the tropolone moiety is quenched in the ground electronic state by complexation with argon. The coordinates of the argon atom in the monomer's principal axis system are a = 0.43 A, b = 0.23 A, and c = 3.48 A.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Argon / chemistry*
Hydrophobic and Hydrophilic Interactions
Microwaves*
Tropolone / chemistry*

Substances

Argon
Tropolone