Cationic Platinum(II) σ-SiH Complexes in Carbon Dioxide Hydrosilation
Ríos, P.; Díez, J.; López-Serrano, Jín.; Rodríguez, A.; Conejero, S., 2016: Cationic Platinum(II) σ-SiH Complexes in Carbon Dioxide Hydrosilation. Chemistry 22(47): 16791-16795
NlmCategory="UNASSIGNED">The low-electron-count cationic platinum complex [Pt(ItBu')(ItBu)][BArF ], 1, interacts with primary and secondary silanes to form the corresponding σ-SiH complexes. According to DFT calculations, the most stable coordination mode is the uncommon η1 -SiH. The reaction of 1 with Et2 SiH2 leads to the X-ray structurally characterized 14-electron PtII species [Pt(SiEt2 H)(ItBu)2 ][BArF ], 2, which is stabilized by an agostic interaction. Complexes 1, 2, and the hydride [Pt(H)(ItBu)2 ][BArF ], 3, catalyze the hydrosilation of CO2 , leading to the exclusive formation of the corresponding silyl formates at room temperature.
DOI: 10.1002/chem.201603524
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