Issue 0, 1973

Conformational behaviour of medium-sized rings. Part I. 5,6,11,12-Tetrahydrodibenzo[a,e]cyclo-octene (1,2,5,6-dibenzocyclo-octa-1,5-diene) and heterocyclic analogues

Abstract

The temperature dependence of the n.m.r. spectra of the eight-membered ring compound 5,6,11,12-tetrahydrodibenzo[a,e]cyclo-octene (1) and various aza- and thia-analogues [(7a–c), (8a–e), (9a–f), and (10b)] has been interpreted in terms of the interconversion of chair- and boat-like conformations. The values of the free energies of activation for these conformational changes are discussed in terms of probable transition state geometries and calculated strain energies.

Article information

Article type
Paper

J. Chem. Soc., Perkin Trans. 1, 1973, 205-217

Conformational behaviour of medium-sized rings. Part I. 5,6,11,12-Tetrahydrodibenzo[a,e]cyclo-octene (1,2,5,6-dibenzocyclo-octa-1,5-diene) and heterocyclic analogues

R. Crossley, A. P. Downing, M. Nógrádi, A. B. de Oliveira, W. D. Ollis and I. O. Sutherland, J. Chem. Soc., Perkin Trans. 1, 1973, 205 DOI: 10.1039/P19730000205

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