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N.m.r. studies on aromatic compounds. I—13C n.m.r. spectra of some mono- and disulpho-substituted hydroxycarboxylic acids

✍ Scribed by Kauko Räisänen; Lauri H. J. Lajunen

Publisher: John Wiley and Sons
Year: 1978
Tongue: English
Weight: 372 KB
Volume: 11
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270110104

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✦ Synopsis

Abstract

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.

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