Premium
Characterization of the unsymmetrical trimer of indole‐5‐carboxylic acid by proton NMR spectroscopy
Author(s) -
Mackintosh J. G.,
Mount A. R.,
Reed D.
Publication year - 1994
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.1260320914
Subject(s) - chemistry , trimer , homonuclear molecule , indole test , carboxylic acid , nuclear magnetic resonance spectroscopy , proton nmr , polymerization , carbon 13 nmr , molecule , organic chemistry , polymer chemistry , polymer , dimer
Indole‐5‐carboxylic acid trimer, a major product formed during the electro‐polymerization of indole‐5 carboxylic acid, was characterized by 1 H NMR spectros‐copy, and a wide range of one‐ and two‐dimensional NMR techniques were employed to allow full analysis of the 1 H spectrum. Homonuclear NOE experiments were carried out in different solvents and at different temperatures, owing to the unusual observation of negative enhancements in some experiments. This was shown to be due to the slow tumbling rate of the molecule.