Substitution of Coordinated Ligands with Olefins

These reaetions are most commonly utilized for preparation of olefin coordination compounds (Table 6.11). Usually, the following ligands are substituted halogens, nitriles, isonitriles, carbonyls, phosphines, etc. 

Other alkenes such as substituted and chelating alkenes, for example, 2-allylpyridine or or /io-allylphenyldiphenylphosphine, react with [PtC ] in the same 

In the case of complexes also containing ligands other than Cl, the geometry of the resulting olefin compound is dictated by the trans effect. 

Commonly, aluminum halides, AIX3, are used to bind the departing halogen ion  

The best results are obtained if a threefold excess of aluminum chloride is used. 

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