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Updated: Apr 30, 2026

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
Published on: October 18, 2019
1,3-Disilabicyclo[1.1.0]butane and η2-Silene Nickel Complex Derived from a Bromosilene
Shunya Honda1, Shintaro Ishida1, Takeaki Iwamoto1
1Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan.
None:
The reactivity of halogen-substituted silenes (silicon-carbon doubly bonded compounds) is not well understood relative to alkenyl halides. Herein, we report the reductive dimerization and complexation of a stable bromosilene (1). The reaction of 1 with an equimolar amount of KC8 furnished a 1,3-disilabicyclo[1.1.0]butane (trans-3) featuring a remarkably short bridgehead Si-Si bond [2.204(1) Å] and a very wide Si-Si-Cexocyclic angle of 173.0(1)°. Bulky alkyl groups on the bridgehead silicon atoms and less steric hindrance at the bridging carbon atoms lead to the short bridgehead bond. Bromosilene 1 reacted with Ni(PMe3)4 to afford the corresponding η2-bromosilene nickel complex (4) as a minor product. Complex 4 exhibits a twisted square planar structure in the solid state. Structural and spectroscopic properties of 4 indicate considerable metallacyclic character.
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