I4N Quadrupole Coupling in the Rotational Spectra of 2,2,2-Trifiuoroethylamine. Isopropylamine, and Aminoethanole

We utilized the high resolution of microwave Fourier transform spectroscopy to investigate the N-hyperfine structure of trans-2,2,2-trifluoroethylamine, CF CH NH , trans-isopropylamine, CH CHNH CH , and aminoethanole, HOCH CH NH , and the amino deuterated isotopomers trifluoroethylamine-d and isopropylamine-d . The complete coupling tensor of trifluoroethylamine could be determined. We found that the fluorine atoms have a distinct effect on the nitrogen electronic surrounding of the named molecule, presumably through a hydrogen bridge bond between two of these atoms and the amino protons. For isopropylamine and aminoethanole wrong values of the coupling constants known in the literature could be corrected