Ligand Exchange at Two Sites

Podal cycle with only one substitutable site 

Structure Symmetry 1 1 Structure Symmetry Space group  

Stereochemical cycles could be used to differentiate structures. For example, if an optically active molecule was known to have either structure XVIII or XIX, a choice could be made on the basis of whether a podal or antipodal cycle was generated when substituents x and y were subjected to an LM by a series of reactions. 

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