Metal Complexes of Cyclic P and C Compounds

Numerous ring compounds containing C, P and M atoms are now known, for example, 

Rings can be components of three-dimensional structures, for example, 

Greater interest has, however, been directed towards unsaturated ring systems. Phosphorins, phospholes, phospholenes, phosphetes, phosphirenes and so forth (Chapters 6.20 through 6.22). These are all capable of forming metal complexes of one kind or another. 

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