OXYMERCURATION OF Δ5-[2,2,2]-BICYCLOÖCTENE

Abstract
It has now been shown that an earlier assignment of configuration in which 1,4-↑↑-ethylene-Δ5-cyclohexenedicarboxylic acids and their derivatives were presumed to form with mercuric salts 5-↓-hydroxy-6-↓-anionomercuri-1,4-↑↑-ethylenecyclohexanedicarboxylic acid derivatives is incorrect. Instead 5-↓-hydroxy-6-↑-anionomercuri-1,4-↑↑-ethylenecyclohexanedicarboxylic acid derivatives are formed, similarly with the homologous 5-↓-hydroxy-6-↑-anionomercuri-1,4-methylenecyclohexane-2,3-dicarboxylic acid derivatives. This similarity is exemplified by comparable dipole moments. The exception is 5-↓-hydroxy-6-↓-chloromercuri-1,4-↑↑-methylenecyclohexane-2,3-↓↓-dicarboxylic acid, γ-lactone, which has a configuration opposite to all of the others of these series having boat-type cyclohexane ring conformations. The exception is attributed to steric effects.

This publication has 2 references indexed in Scilit: