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Rotation-inversion spectrum of methylaminoethane
Authors:RE Penn  James E Boggs
Institution:Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712 USA
Abstract:Microwave spectral assignments have been made for the ground and several excited vibrational states of the normal and amino d1 species of methylaminoethane. The inversion-rotation spectrum is consistent with a trans rotameric form with an amino inversion barrier of ~5.2 kcal mole?1. The dipole moment of 8.88 ± 0.02 Debye has components |μa| = 0.00 ± 0.03, |μb| = 0.25 ± 0.03, and |〈 ± μc ? 〉| = 0.84 ± 0.01 Debye. The normal species N14 nuclear quadrupole coupling constants are (in MHz) 2.82 ± 0.09, 0.88 ± 0.13, and ?3.70 ± 0.09 for χaa, χbb, and χcc, respectively.
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