Crystal structure of 2-hydroxy-1,3,4,6,8,9-hexamethyltricyclo[4.4.0.02,8]deca-3,9-dien-5-one

Abstract

Crystals of the title compound (II) are triclinic, a= 7·832(1), b= 13·797(3), c= 6·731(1)Å, α= 98·21(3), β= 101·36(2), γ= 92·71(3)°, Z= 2, space group P. The structure was determined from diffractometer data by direct methods, and refined by full-matrix least-squares techniques to R 0·061 for 1774 observed reflections. One six-membered ring has a half-chair and the other a boat conformation, the latter as part of a norbornene system. Some of the bonds are longer than normal.