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  • adjective mathematics Of or pertaining to polytopes.
  • adjective chemistry Describing any rearrangement reaction involving atoms or groups at the vertices of a polyhedron.


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  • On the more inorganic side, we have systematically explored the geometries, polytopal rearrangement and substitution site preferences of five, six, seven and eight coordination, the factors that influence whether certain ligands will bridge or not, the constraints of metal-metal bonding, and the geometry of uranyl and other actinide complexes.

    Roald Hoffmann - Autobiography


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