Preparation of Stable Low-Oxidation-State Group 14 Element Amidohydrides and Hydride-Mediated Ring-Expansion Chemistry of N-Heterocyclic Carbenes

作者：Al Rafia S M Ibrahim; McDonald Robert; Ferguson Michael J; Rivard Eric^*

来源：Chemistry - A European Journal, 2012, 18(43): 13810-13820.

DOI：10.1002/chem.201202195

• amides
• carbenes
• hydrides
• main-group elements
• ring expansion

Various low oxidation state (+2) group 14 element amidohydride adducts, IPr center dot 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 carbeneborane adduct, IPr center dot BH2NHDipp. When a solution of IPr center dot BH2NHDipp in toluene was heated to 100 degrees C, a rare C-N bond-activation/ring-expansion reaction involving the bound N-heterocyclic carbene donor (IPr) transpired.

• 出版日期2012-10