M. Thommen et al., A CIS,TRANS,CIS,CIS-[4.5.5.5]FENESTRANE DERIVATIVE, Acta crystallographica. Section C, Crystal structure communications, 52, 1996, pp. 2051-2053
The title compound, R,7S,10R)-7-(tert-butyldimethylsilyloxy)tetracyclo
[5.4.1.0(4,12).0(10,12)]dodecan-2-one, C18H30O2Si, has been prepared
and its structure determined. The geometry of the central C(C)(4) subs
tructure of the fenestrane skeleton shows a considerable distortion fr
om an ideal tetrahedral arrangement towards planarity. Values of 127.0
(2) and 131.1(2)degrees are observed for the bond angles at the bridg
ehead atoms of the trans-bicyclo[3.3.0]octane subunit.