From a Stable Silanone Complex to Isolable, Donor-Supported Silicoxonium Halides [LSi(dmap)OSiMe3]+X−

Yao, Shenglai; Xiong, Yun; Irran, Elisabeth; Driess, Matthias

doi:10.1002/chem.201101610

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From a Stable Silanone Complex to Isolable, Donor-Supported Silicoxonium Halides [LSi(dmap)OSiMe3]+X−

Author(s): Yun Xiong , Shenglai Yao , Elisabeth Irran , Matthias Driess

Publication date Created: September 26 2011

Publication date (Print): September 26 2011

Journal: Chemistry - A European Journal

Publisher: Wiley-Blackwell

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An isolable NHC-supported silanone.

Yun Xiong, Shenglai Yao, Matthias Driess (2009)

The unique isolable silanone complex 3 has been synthesized and isolated in 94% yield by the remarkably facile oxygenation of the NHC-silylene precursor 2 featuring a Si(II) atom with unusually high nucleophilicity. The latter precursor is easily accessible by reaction of the stable silylene 1 with the corresponding N-heterocyclic carbene (NHC) at -60 degrees C. The remarkably short Si=O distance of 1.541(2) A in 3 suggests the presence of a betaine-like Si=O pi system with balanced electrostatics.