"Polytopal Rearrangement Model of Stereoisomerization" and Its Potential as the Basis for a Systematic Model of All Stereoisomerism.

The term "polytopal rearrangement" describes any shape changing process operating on a coordination "polyhedron"-the solid figure defined by the positions of the ligand atoms directly attached to the central atom of a coordination entity. Developed in the latter third of the last century, the polytopal rearrangement model of stereoisomerization is a general mathematical approach for analyzing and accommodating the complexity of such processes for any coordination number. The motivation for the model was principally to deal with the complexity, such as Berry pseudorotation in pentavalent phosphorus species, arising from rearrangements in inorganic coordination complexes of higher coordination numbers. The model is also applicable to lower coordination centers, for example, thermal "inversion" at nitrogen in NH

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© 2024 The Authors. Published by American Chemical Society.

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The authors declare no competing financial interest.