Synthetic, structural and reactivity studies of a boryl-ethynyl Silylene

Abstract

The salt metathesis of a boryl-ethynyl lithium salt {[(HCDipN)₂]B-CC-Li} with a monochlorosilylene [LSi(:)Cl; L = PhC(N^tBu)₂] produced an isolable boryl-ethynyl silylene {1; [(HCDipN)₂]B–CC–Si(L)}. The Si(II) center in 1 possesses a nonbonding lone pair and forms a covalent bond with the ethynyl group. The characterization of 1 was carried out by multinuclear NMR spectroscopy, single-crystal X-ray structure analysis and DFT calculations. Additionally, a reactivity study of 1 was conducted towards oxygen-containing and aryl C–F substrates.