NHC Supersilyl Silver Complex [Ag(IPr)Si t Bu 3 ] as a Promising Agent for Substitution Reactions

The NHC supersilyl silver complex [Ag(IPr)Si t Bu 3 ] (IPr = NHC IPr ) was prepared by treatment of Ag(IPr)Cl with Na(thf) 2 [Si t Bu 3 ] in benzene/thf at room temperature. X‐ray quality crystals of the NHC supersilyl silver complex [Ag(IPr)Si t Bu 3 ] (monoclinic, space group P 2 1 / m ) were grown from heptane at room temperature. The 29 Si NMR spectrum of a solution of [Ag(IPr)Si t Bu 3 ] in C 6 D 6 revealed two doublets caused by coupling to 107 Ag and 109 Ag nuclei. We further investigated the possibility of a conversion of triel halides EX 3 by treatment with [Ag(IPr)Si t Bu 3 ]. At ambient temperature the reaction of [Ag(IPr)Si t Bu 3 ] with an excess of EX 3 yielded t Bu 3 SiEX 2 (E = B, Al; X = Cl, Br; E = Ga; X = Cl) and IPr · EX 3 (EX 3 = BCl 3 , BBr 3 , AlCl 3 , AlBr 3 , GaCl 3 ). The identity of t Bu 3 SiEX 2 and IPr · EX 3 was confirmed by comparison with authentic samples.