Abstract

The organometallic chemistry of platinum covers a huge field, as shown by a recent survey covering the crys- tallographic and structural data of almost one thousand organometallic derivatives. About nine percent of those deriva- tives exist as isomers and are summarized in this review and include distortion (90 %), cis - trans (6%) and ligand isomer- ism (4%). These are discussed in terms of the coordination about the platinum atom, and correlations are drawn between donor atom, bond length and interbond angles, with attention to any trans - effect. Distortion isomers, differing only by degree of distortion in Pt-L bond lengths and L- Pt -L bond angles, are the most nu- merous. They are also spread over a wider range of oxidation states of platinum, (zero, +1, +2, +4, mixed valence +1 plus +2 and +2 plus +4), compared to cis-trans and ligand isomerism in which only +2 is found.

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