Stereochemical Correspondence among Chemically Disparate Systems: Spirocyclic Phosphoranes, Diarylmethanes, and Cognates.

Certain chemical systems which differ greatly in many of their chemical properties may nevertheless exhibit stereochemically isomorphic behavior, i.e., they may be stereochemically correspondent. Two such systems are spirocyclic pentacoordinate molecules and molecules of the type Ar(2)ZX. The consequences of stereochemical correspondence between these two systems are explored in depth.