Synthesis of Boryl-Substituted Disilane, Disilene, and Silyl Cation
Zhaocai Liu, Jianying Zhang, Hao Yang, Chunming Cui
Abstract
Reduction of (boryl)dibromosilane (boryl)SiHBr2 (1; boryl = B(NArCH)2, Ar = 2,6-iPr2C6H3) with 2 equiv of potassium graphite in DME at low temperature led to the isolation of bis(boryl)disilane (boryl)SiH2SiH2(boryl) (3) as a colorless solid, whereas reduction of (boryl)SiPhBr2 (2) in THF gave the boryl-substituted disilene (boryl)PhSi═SiPh(boryl) (4) as a yellow solid. The reaction of 1 with 1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene (IiPr) unexpectedly led to the formation of the cationic species [(boryl)SiHBr(IiPr)]+Br– (6). These products were characterized by spectroscopic methods as well as by X-ray single-crystal analysis.
Topics & Concepts
ChemistryDisilaneSilylationCationic polymerizationMedicinal chemistryCrystal structureBoronCrystallographyPolymer chemistryOrganic chemistrySiliconCatalysisOrganoboron and organosilicon chemistrySynthesis and characterization of novel inorganic/organometallic compoundsCatalytic Cross-Coupling Reactions