Question

in Bredt's rule why we can't form a double bond at a bridge head carbon​

Answer 1

Explanation:

Bredt's rule is a consequence of the fact that having a double bond on a bridgehead would be equivalent to having a transdouble bond on a ring, which is not stable for small rings (fewer than eight atoms) due to a combination of ring strain, and angle strain (nonplanar alkene).

Answer 2

Explanation:

in Bredt's rule why we can't form a double bond at a bridge head carbon.