This review provides a survey of the key-class of Pt-0 complexes of general formula [Pt(N,N`-chelate)(eta(2)-olefin)]. The main spectroscopic, structural and chemical features are discussed, in terms of electronic and steric properties of the ancillary ligands. The versatile reactivity towards electrophiles is described as a very useful entry to Pt-II compounds with a wide assortment of ligands, such as halido, hydrido, hydrocarbyl, organometal, organoelement and carbene fragments, in some cases stabilised for the first time by the careful choice of the N,N`-ligand. Remarkably, the reactions can be an equilibrium, and their relevant thermodynamic parameters have also been collected, thus allowing a thorough discussion of the electronic and steric factors which affect its position. RI De Felice, Vincenzo/F-4702-2012
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