The microwave spectrum of trans-ethylamine |
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Authors: | E. Fischer I. Botskor |
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Affiliation: | Department of Chemistry, University of Ulm, D-7900 Ulm, West Germany |
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Abstract: | The microwave spectrum of normal trans-ethylamine CH3CH2NH2 and that of the -NHD and -ND2 species were measured and assigned. The obtained rotational constants for the ground state of the normal species are (in MHz): A = 31 758.33 ± 0.08, B = 8749.157 ± 0.025, and C = 7798.905 ± 0.025. The fitted dipole moment components are (in Debye): |μ|a = 1.057 ± 0.006, |μb| = 0.764 ± 0.009, and |μt| = 1.304 ± 0.011. The quadrupole coupling constants were fitted as (in MHz): χ+ = 1.62 ± 0.035 and χ? = ?1.89 ± 0.08. Analysis of the HFS of the deuterated species -ND2 allowed the experimental determination of the principal quadrupole tensor values (in MHz): χzz = ?4.68 ± 0.20, χyy = 1.75 ± 0.06, and χxx = 2.93 ± 0.20. The angle between the CN bond and the direction of the χzz quadrupole tensor component was fitted as 108.9° ± 0.6° and agreed with the expected general direction of the lone electron pair. |
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