The conformational analysis of saturated heterocycles. Part LXII. cis–trans-Equilibria of 4-phospha-analogues of 2,6-dimethylcyclohexanone

Abstract

4-Phospha-analogues of 2,6-dimethylcyclohexanones exist in three (isolable) stereoisomeric forms. These have been investigated for the 4-phenylphospha-compound and its oxo-, thioxo-, and selenoxo-derivatives. Equilibrium constants have been determined and corresponding ΔG° differences are compared with those for other heteraanalogues of 2,6-dimethylcyclohexanone.