Activation of Nitriles by Trichloro[2‐(dialkylphosphanyl)imidazol‐1‐yl]silanes – Synthesis and Characterization of New Dinuclear Pentacoordinate Silicon(IV) Complexes with Bridging Imido‐Nitrogen Ligand Atoms

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Abstract
Trichloro[2‐(dialkylphosphanyl)imidazol‐1‐yl]silanes 3 and 4 react with aceto‐ or propionitrile to yield the dinuclear pentacoordinate silicon(IV) complexes 5–8, which contain two bridging dianionic N,N‐ligands generated by silicon‐mediated nitrile activation. Compounds 5–8 contain two SiCl2N3 skeletons, with two imido‐nitrogen ligand atoms that bridge the silicon coordination centers. The pentacoordinate silicon(IV) complexes 5–8 were characterized by elemental analysis, single‐crystal X‐ray diffraction, and solid‐state NMR spectroscopy.

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