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N.m.r. studies on aromatic compounds. I— 13 C n.m.r. spectra of some mono‐ and disulpho‐substituted hydroxycarboxylic acids
Author(s) -
Räisänen Kauko,
Lajunen Lauri H. J.
Publication year - 1978
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.1270110104
Subject(s) - spectral line , decoupling (probability) , chemistry , stereochemistry , medicinal chemistry , physics , control engineering , astronomy , engineering
Carbon‐13 n.m.r. spectra of 3‐hydroxy‐4‐sulpho‐2‐naphthoic, 3‐hydroxy‐5‐sulpho‐2‐naphthoic, 3‐hydroxy‐7‐sulpho‐2‐naphthoic, 5‐sulphosalicylic, 3‐hydroxy‐5,7‐disulpho‐2‐naphthoic, 1‐hydroxy‐4,7‐disulpho‐2‐naphthoic, and 3,5‐disulphosalicylic acids were recorded with and without proton noise‐decoupling. Analyses of the spectra were carried out for all compounds except 3‐hydroxy‐5‐sulpho‐2‐naphthoic acid which dimerized. The fine splitting caused by long‐range coupling was used in identifying the lines of the 13 C n.m.r. spectra.