Longibornanes, and Longifolanes

Since the structure of longifolene (208) is readily recognized to be similar to sativene with the bridging six-membered ring expanded to seven members, it is not surprising that the biogeneses of these 

The 100-fold faster rate of solvolysis of longibornyl chloride (207-Cl) compared to bornyl chloride has been attributed to relief of an H—H transannular steric interaction in the transition state 233, 283). Since longifolene obtained from solvolysis of longibornyl bromide is optically 

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