Structure of 3,6-dimethyl-1,4-dioxane-2,5-dione [<scp>D</scp>-,<scp>D</scp>-(<scp>L</scp>-,<scp>L</scp>-)lactide]

Abstract

BIS[(1-PHENYL-1-CYCLOPROPYL)CARBONYL] PEROXIDE 1679 such a conformation unfavourable. The observed conformation is 21 o from the perpendicular geometry. It appears, therefore, that the observed geometry is a consequence of a balance between two opposing constraints: (i) maximization of orbital overlap between the n system of the phenyl group and the cyclopropyl orbitals, and (ii) the unfavourable interaction between H(52) and H(81).