Ba. Lloyd et al., STRUCTURAL COMPARISONS OF A PERPENDICULAR DIENE WITH KNOWN DERIVATIVES, Acta crystallographica. Section C, Crystal structure communications, 50, 1994, pp. 781-784
The X-ray crystal structure determination of endo,exo-12-methylenetetr
acyclo[6.2. 1.1(3,6).0(2,7)]dodec-9-en-anti-11-yl p-bromobenzoate, C20
H19BrO2 (1), is reported. The molecule consists of norbornene with an
anti-p-bromobenzoate substituent at the methano bridge and an exo-meth
ylenenorbomyl unit endo-fused to the ethano bridge. The ring C atom of
the exocyclic double bond is pyramidalized significantly. Steric inte
ractions are examined and some structural comparisons are made with ot
her derivatives.