Absolute configuration of coordination compounds

Kirschner S. The Pfeiffer Effect, Outer-Sphere Complexation, and the Absolute Configuration of Coordination Compounds. J Indian Chem Soc 1974 51 28-31. 

To facilitate the identification of the absolute configuration of the phosphorus center, the nomenclature system for a coordination compound [MX(AB)2] (AB = hetero-bidentate ligand) that can have TBP or square-pyramidal (SP) geometry was used. In the TBP geometry, when a monodentate ligand X occupies one equatorial position, the chiral-at-metal configuration can be defined as /I or d (Figure 3). 

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