Nuclear magnetic resonance conformational studies of C-substituted pyrrolecarbaldehydes. Part I. Substituent effects on aldehyde conformations as shown by long range coupling constants
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 4,p. 333-337
- https://doi.org/10.1039/p29750000333
Abstract
The conformations of the formyl group of the two pyrrolecarbaldehydes and the mono-iodo, -nitro,-ethoxycarbonyl, and -formyl derivatives have been determined by a study of the 5J and 4J long range coupling constants. The results show the influence of the nature and position of the substituent on the relative proportions of the two conformers. The influence of solvent on the value of 5J and 4J is considered for certain cases.Keywords
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