Carbon–tin σ-bond participation in solvolysis: a pronounced ε-effect in 5-mesyloxycyclooctyltrimethylstannanes
Abstract
cis-5-Mesyloxycyclooctlytrimethylstannane solvolyses in 80% ethanol–20% water ca. 800 times faster than the trans-isomer and affords exclusively bicyclo[3.3.0]octane, consistent with a stereoelectronically regulated 1,5-percaudal interaction (ε-effect) from the C-Sn σ-bond.