True and masked three-coordinate T-shaped platinum(II) intermediates

Manuel A. Ortuño, Salvador Conejero, Agustí Lledós

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Resum

Although four-coordinate square-planar geometries, with a formally 16-electron counting, are absolutely dominant in isolated Pt(II) complexes, three-coordinate, 14-electron Pt(II) complexes are believed to be key intermediates in a number of platinum-mediated organometallic transformations. Although very few authenticated three-coordinate Pt(II) complexes have been characterized, a much larger number of complexes can be described as operationally three-coordinate in a kinetic sense. In these compounds, which we have called masked T-shaped complexes, the fourth position is occupied by a very weak ligand (agostic bond, solvent molecule or counteranion), which can be easily displaced. This review summarizes the structural features of the true and masked T-shaped Pt(II) complexes reported so far and describes synthetic strategies employed for their formation. Moreover, recent experimental and theoretical reports are analyzed, which suggest the involvement of such intermediates in reaction mechanisms, particularly C-H bond-activation processes.© 2013 Ortuño et al; licensee Beilstein-Institut.
Idioma originalAnglès
Pàgines (de-a)1352-1382
RevistaBeilstein Journal of Organic Chemistry
Volum9
DOIs
Estat de la publicacióPublicada - 9 de jul. 2013

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