Relaxation processes in aromatic methyl groups. ii: Methyl-methyl nuclear overhauser enhancements

Margaret L. Baron, Lisandra L. Martin, Ian D. Rae, Peta M. Simmonds, Mark L. Woolcock

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Abstract

A range of compounds with methyl groups disposed ortho and peri on heteroaromatic frameworks have been prepared, and T1 values and methyl-methy! Overhauser effects measured for them. Most of the n.O.e. values were =6%, but two examples of methyls flanked by two others exhibited values of 9% (6-hydroxy-4, 4, 5, 7-tetramethyl-3, 4-dihydro-2H- benzopyran-2-one) and 15% (1, 4, 5, 8, 9-pentamethylcarbazole).

Original languageEnglish
Pages (from-to)741-747
Number of pages7
JournalAustralian Journal of Chemistry
Volume43
Issue number4
DOIs
Publication statusPublished - 1 Jan 1990

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