Elusive Silane-Alane Complex [SiH⋅⋅⋅Al]: Isolation, Characterization, and Multifaceted Frustrated Lewis Pair Type Catalysis

The super acidity of the unsolvated Al(C6F5)3 enabled isolation of the elusive silane–alane complex [SiH⋅⋅⋅Al], which was structurally characterized by spectroscopic and X‐ray diffraction methods. The Janus‐like nature of this adduct, coupled with strong silane activation, effects multifaceted frus...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2015-06, Vol.54 (23), p.6842-6846
Main Authors: Chen, Jiawei, Chen, Eugene Y.-X.
Format: Article
Language:English
Subjects:
Activation
alanes
Alkenes
Catalysis
Diffraction
Joining
Lewis acids
Silanes
Spectroscopy
structure elucidation
X-ray diffraction
X-rays
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Summary:The super acidity of the unsolvated Al(C6F5)3 enabled isolation of the elusive silane–alane complex [SiH⋅⋅⋅Al], which was structurally characterized by spectroscopic and X‐ray diffraction methods. The Janus‐like nature of this adduct, coupled with strong silane activation, effects multifaceted frustrated‐Lewis‐pair‐type catalysis. When compared with the silane–borane system, the silane–alane system offers unique features or clear advantages in the four types of catalytic transformations examined in this study, including: ligand redistribution of tertiary silanes into secondary and quaternary silanes, polymerization of conjugated polar alkenes, hydrosilylation of unactivated alkenes, and hydrodefluorination of fluoroalkanes. Al does it all: The elusive silane–alane complex [SiH⋅⋅⋅Al] was isolated and structurally characterized by spectroscopic and X‐ray diffraction methods. The Janus‐like nature of this adduct, coupled with strong silane activation, effects multifaceted frustrated‐Lewis‐pair‐type catalysis. Its use in four different reactions is described.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201502400