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1 H and 13 C chemical shifts for bis(benzopyridinium) dibromides with semirigid aromatic linkers
Author(s) -
Campos J.,
Díaz J. J.,
Núñez M. C.,
Entrena A.,
Gallo M. A.,
Espinosa A.
Publication year - 2002
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1050
Subject(s) - chemistry , chemical shift , dept , nuclear magnetic resonance spectroscopy , cationic polymerization , nuclear overhauser effect , two dimensional nuclear magnetic resonance spectroscopy , stereochemistry , spectroscopy , organic chemistry , physics , quantum mechanics
The 1 H and 13 C NMR resonances for four bisquinolinium and four bisisoquinolinium dibromides were completely and unequivocally assigned, using the concerted application of one‐ and two‐dimensional NMR techniques including nuclear Overhauser effect difference, DEPT, COSY, HETCOR and long‐range 13 C– 1 H correlation spectroscopy. Atomic charges of the heterocyclic moieties of model cations such as 1‐methylquinolinium and 2‐methylisoquinolinium are shown to be linearly related to the 13 C chemical shifts of the cationic heads of the title compounds. Copyright © 2002 John Wiley & Sons, Ltd.