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The microwave spectrum of trans-ethylamine

The microwave spectrum of normal trans-ethylamine CH 3CH 2NH 2 and that of the -NHD and -ND 2 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 fitte...

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Bibliographic Details
Published in:Journal of molecular spectroscopy 1982, Vol.91 (1), p.116-127
Main Authors: Fischer, E., Botskor, I.
Format: Article
Language:English
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Summary:The microwave spectrum of normal trans-ethylamine CH 3CH 2NH 2 and that of the -NHD and -ND 2 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, | μ b | = 0.764 ± 0.009, and | μ t | = 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 -ND 2 allowed the experimental determination of the principal quadrupole tensor values (in MHz): χ zz = −4.68 ± 0.20, χ yy = 1.75 ± 0.06, and χ xx = 2.93 ± 0.20. The angle between the CN bond and the direction of the χ zz quadrupole tensor component was fitted as 108.9° ± 0.6° and agreed with the expected general direction of the lone electron pair.
ISSN:0022-2852
1096-083X
DOI:10.1016/0022-2852(82)90035-2