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Article Dans Une Revue Organometallics Année : 2018

Stabilization of trans disilyl coordination at square-planar platinum complexes

Résumé

By using two different multidentate phosphinosilyl ligands, we prepared the two platinum complexes [PtPhP((o-C6H4)CH2SiMe2)2PPh3] (3) and [PtP((o-C6H4)CH2SiMe2)2(o-C6H4)CHSiMe2)PPh3] (4) exhibiting a trans configuration of the silicon atoms in a typical square-planar geometry around a Pt(II) center. Complex 4 results from intramolecular C–H activation of a methylene moiety by the third silicon atom of the original ligand and displays an anagostic C–H···Pt interaction, as supported by solution NMR data and solid-state X-ray diffraction analysis. The reactivity of 3 toward small molecules is also discussed. In the case of H2 and CO, the corresponding dihydride [PtH2PhP((o-C6H4)CH2SiMe2)2PPh3] (5) and dicarbonyl [PtPhP((o-C6H4)CH2SiMe2)2(CO)2] (6) complexes were characterized, whereas reduction to Pt(0) and release of PPh3 and HSiMe3 were observed upon thermolysis in the presence of HBpin.
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Dates et versions

hal-01961539 , version 1 (20-12-2018)

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Cynthia Cuevas-Chávez, Julio Zamora-Moreno, M. A. Munoz-Hernandez, Christian Bijani, Sylviane Sabo-Etienne, et al.. Stabilization of trans disilyl coordination at square-planar platinum complexes. Organometallics, 2018, 37 (5), pp.720-728. ⟨10.1021/acs.organomet.7b00566⟩. ⟨hal-01961539⟩
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