An N-Heterocyclic Carbene-Disilyne Complex and Its Reactivity toward ZnCl_2

摘要

The reaction of disilyne 1 with 1,3,4,5-tetramethylimi-dazol-2-ylidene (an N-heterocyclic carbene, NHC) produced the disilyne-NHC complex 2, RLSi=SiR: (R = Si~iPr[CH(SiMe_3)_2]_2, L = NHC), with a trans geometry of the Si=Si moiety and lone-pair electrons residing on one of the double-bonded Si atoms. Upon complexation of 2 with ZnCl_2, the disilyne-NHC-ZnCl_2 complex 3 was produced, in which the Si=Si bond adopted the cis geometry.