NHC Supersilyl Silver Complex [Ag(IPr)SitBu_3] as a Promising Agent for Substitution Reactions

摘要

The NHC supersilyl silver complex [Ag(IPr)SitBu_3] (IPr = NHCIPr) was prepared by treatment of Ag(IPr)Cl with Na(thf)_2[SitBu_3] in benzene/thf at room temperature. X-ray quality crystals of the NHC supersilyl silver complex [Ag(IPr)SitBu_3] (monoclinic, space group P21/m) were grown from heptane at room temperature. The 29Si NMR spectrum of a solution of [Ag(IPr)SitBu_3] in C6D6 revealed two doublets caused by coupling to 107Ag and 109Ag nuclei. We further investi-gated the possibility of a conversion of triel halides EX3 by treatment with [Ag(IPr)SitBu_3]. At ambient temperature the reaction of [Ag(IPr)SitBu_3] with an excess of EX3 yielded tBu_3SiEX_2 (E = B, Al; X = Cl, Br; E = Ga; X = Cl) and IPr·EX3 (EX3 = BCl_3, BBr_3, AlCl_3, AlBr_3, GaCl_3). The identity of tBu_3SiEX_2 and IPr·EX3 was confirmed by comparison with authentic samples.