trans-Cycloalkenes. Part 7. Variable temperature 13C nuclear magnetic resonance studies on cis,trans-cyclo-octa-1,5-diene and related compounds
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 10,p. 1371-1373
- https://doi.org/10.1039/p29770001371
Abstract
cis,trans-Cyclo-octa-1,5-diene (1) and the derived trans-bicyclo[6.1.0]non-4-ene (3) and its 9-oxa-(2) and 9-phenyl-9-aza-(3) analogues show temperature-dependent 13C n.m.r. spectra which are interpreted in terms of a conformational ring inversion process. The energy barriers for this process for compounds (1)–(4) are estimated to be 35, 41.5, 45, and 44.5 kJ mol–1, respectively.Keywords
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