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Updated: Aug 6, 2026

Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
Asymmetric top rotors in electric fields. II. Influence of internal torsions in molecular beam deflection experiments
R Antoine1, M Abd El Rahim, M Broyer
1Laboratoire de Spectrométrie Ionique et Moléculaire, UMR 5579 (Université Lyon I et CNRS), Bât. A. Kastler, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne Cedex, France. rantoine@lasim.univ-lyon1.fr
Abstract:
We report on electric deflection experiments of aminobenzonitrile and (dimethylamino)benzonitrile molecules. They are used as prototypes to study the influence of the asymmetry and rotation-vibration couplings in deflection experiments. Experimental deflection profiles are compared to results of ab initio calculations in the frame of the rigid rotor Stark effect and of the statistical linear response. The change in symmetry and the introduction of methyl groups lead to a transition from the rigid rotor response to the linear response. From the experimental results, a total dipole of mu = 6.2 +/- 0.6 D has been deduced for the m-(dimethylamino)benzonitrile molecule (MDMABN).
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