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14 N chemical shifts in the enamino ketone quaternary ammonium salts
Author(s) -
Dąbrowski Janusz,
Kamieńskatrela Krystyna,
Sadlej Andrzej J.
Publication year - 1971
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.1270030514
Subject(s) - ammonium , interpretation (philosophy) , chemical shift , ketone , electromagnetic shielding , quaternary , chemistry , series (stratigraphy) , nuclear magnetic resonance , organic chemistry , physics , quantum mechanics , philosophy , paleontology , linguistics , biology
The 14 N chemical shifts were measured for a series of quaternary ammonium salts of enamino ketones. An upfield shift of the 14 N resonance signals upon quaternization has been observed. The interpretation in terms of the approximate theory of nuclear magnetic shielding is given. The calculations for some model systems result in a general agreement with the experimental data.