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Title: Microwave spectrum of the N{sub 2}O-SO{sub 2} dimer: Evidence for tunneling and an asymmetric structure

Abstract

The microwave spectrum of the nitrous oxide-sulfur dioxide complex has been investigated. The dimer differs from similar complexes of SO{sub 2} with a linear molecule in that it lacks a symmetry plane. A tunneling motion splits the transitions into doublets. This is attributed to an interconversion between mirror-image conformations in which the oxygen atoms on the SO{sub 2} are inequivalent. The rotational constants for the normal species are A = 6126.9781(15) MHz, B = 1494.537(37) MHz, and C = 1435.474(36) MHz for the higher frequency component of the doublets and A = 5500 MHz (fixed), B = 1463.483(23) MHz, and C = 1420.953(23) MHz for the lower frequency component. Spectra for four isotopomers in addition to the normal species have been measured, and the dipole moment of the complex has been determined to be 1.212 D. A semiempirical model with atom-atom interaction terms is consistent with an asymmetric equilibrium structure.

Authors:
;
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (US)
OSTI Identifier:
20075885
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory
Additional Journal Information:
Journal Volume: 104; Journal Issue: 21; Other Information: PBD: 1 Jun 2000; Journal ID: ISSN 1089-5639
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; NITROUS OXIDE; SULFUR DIOXIDE; DIMERS; MICROWAVE SPECTRA; MOLECULAR STRUCTURE; ASYMMETRY; DIPOLE MOMENTS

Citation Formats

Peebles, R.A., and Kuczkowski, R.L. Microwave spectrum of the N{sub 2}O-SO{sub 2} dimer: Evidence for tunneling and an asymmetric structure. United States: N. p., 2000. Web. doi:10.1021/jp000236p.
Peebles, R.A., & Kuczkowski, R.L. Microwave spectrum of the N{sub 2}O-SO{sub 2} dimer: Evidence for tunneling and an asymmetric structure. United States. doi:10.1021/jp000236p.
Peebles, R.A., and Kuczkowski, R.L. Thu . "Microwave spectrum of the N{sub 2}O-SO{sub 2} dimer: Evidence for tunneling and an asymmetric structure". United States. doi:10.1021/jp000236p.
@article{osti_20075885,
title = {Microwave spectrum of the N{sub 2}O-SO{sub 2} dimer: Evidence for tunneling and an asymmetric structure},
author = {Peebles, R.A. and Kuczkowski, R.L.},
abstractNote = {The microwave spectrum of the nitrous oxide-sulfur dioxide complex has been investigated. The dimer differs from similar complexes of SO{sub 2} with a linear molecule in that it lacks a symmetry plane. A tunneling motion splits the transitions into doublets. This is attributed to an interconversion between mirror-image conformations in which the oxygen atoms on the SO{sub 2} are inequivalent. The rotational constants for the normal species are A = 6126.9781(15) MHz, B = 1494.537(37) MHz, and C = 1435.474(36) MHz for the higher frequency component of the doublets and A = 5500 MHz (fixed), B = 1463.483(23) MHz, and C = 1420.953(23) MHz for the lower frequency component. Spectra for four isotopomers in addition to the normal species have been measured, and the dipole moment of the complex has been determined to be 1.212 D. A semiempirical model with atom-atom interaction terms is consistent with an asymmetric equilibrium structure.},
doi = {10.1021/jp000236p},
journal = {Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory},
issn = {1089-5639},
number = 21,
volume = 104,
place = {United States},
year = {2000},
month = {6}
}