Preparation of Stable Low‐Oxidation‐State Group 14 Element Amidohydrides and Hydride‐Mediated Ring‐Expansion Chemistry of N‐Heterocyclic Carbenes |
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| Authors: | S M Ibrahim Al‐Rafia Dr Robert McDonald Dr Michael J Ferguson Prof Dr Eric Rivard |
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| Institution: | Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, T6G 2G2 (Canada), Fax: (+1)?780‐492‐8231 |
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| Abstract: | Various low oxidation state (+2) group 14 element amidohydride adducts, IPr ? EH(BH3)NHDipp (E=Si or Ge; IPr=(HCNDipp)2C:], Dipp=2,6‐iPr2C6H3), were synthesized. Thermolysis of the reported adducts was investigated as a potential route to Si‐ and Ge‐based clusters; however, unexpected transmetallation chemistry occurred to yield the carbene–borane adduct, IPr ? BH2NHDipp. When a solution of IPr ? BH2NHDipp in toluene was heated to 100 °C, a rare C? N bond‐activation/ring‐expansion reaction involving the bound N‐heterocyclic carbene donor (IPr) transpired. |
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| Keywords: | amides carbenes hydrides main‐group elements ring expansion |
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