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14 N nuclear quadrupole resonance in carbazoles
Author(s) -
Kim N. S.,
Bray P. J.
Publication year - 1981
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270170313
Subject(s) - pyrrole , carbazole , delocalized electron , nuclear quadrupole resonance , chemistry , nitrogen , quadrupole , charge density , photochemistry , resonance (particle physics) , nuclear magnetic resonance , atomic physics , organic chemistry , physics , quantum mechanics
Nitrogen‐14 nuclear quadrupole resonance frequencies at 77 K are reported for a series of carbazole compounds including N ‐vinylcarbazole. Differences in charge distribution between pyrrole and carbazole are explained on the basis of delocalization of pi electrons. Effects of the aldehyde and vinyl groups on charge distribution are discussed. Sigma bond polarization between the pyrrole nitrogen and the nitroso nitrogen toward the pyrrole nitrogen exists in N ‐nitrosocarbazole.