Platinum complexes ring-opening reactions

Ring opening reactions are the main feature of a brief review (though with 69 references) of kinetics and mechanisms of hydrolysis and substitution reactions of platinum(II) complexes (219). 

A benzylic platinum complex treated with excess HCl results in the loss of MeCl, presumably via an unusual methylene transfer (Scheme 67). Ring opening by relief of strain is a useful route for C bond cleavage. The reaction of biphenylene with a series of Pt bisphosphine... 

Unequivocal evidence for the ring-opening cleavage was provided by the reaction of the isolated neutral (cyclobutylmethyl)platinum complex 71 [85]. On thermal generation of a vacant coordination site, 71 undergoes (3-carbon elimination to afford 2-methyl-l,4-pentadiene together with a hydride complex. 

The reaction of dibenzylideneacetone (l,5-diphenylpenta-l,4-dien-3-one) complexes of palla-dium(O) and platinum(O) with 1,2,3-triarylcyclopropenylium bromides 8 afforded the ring-opened trinuclear complexes 9, whose structures were determined by X-ray crystallography 9.50... 

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