Memory effects in multiple carbonium ion rearrangements. III. Effects of .beta.-methyl substitution on selectivity and reactivity in the ring expansions of 7-norbornylcarbinyl and 7-norbornenylcarbinyl derivatives
Memory effects in multiple carbonium ion rearrangements. III. Effects of .beta.-methyl substitution on selectivity and reactivity in the ring expansions of 7-norbornylcarbinyl and 7-norbornenylcarbinyl derivatives