Conformational behaviour of medium-sized rings. Part 7. 5,6,7,12-Tetrahydrodibenzo[a,d]cyclo-octene

Abstract

The temperature dependences of the ¹H n.m.r. and broad-band decoupled ¹³C n.m.r. spectra of 5,6,7,12-tetrahydrodibenzo[a,d]cyclo-octene (4) have been interpreted in terms of the interconversion of chair- and boat-like conformations. Strain energy calculations on selected conformations of this hydrocarbon (4) have led to useful correlations between calculated and experimental thermodynamic parameters.