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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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Published in: | Journal of molecular spectroscopy 1982, Vol.91 (1), p.116-127 |
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Main Authors: | , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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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. |
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ISSN: | 0022-2852 1096-083X |
DOI: | 10.1016/0022-2852(82)90035-2 |