Molecular structures of free quinuclidine and its adducts with metal trihydrides, MH3 (M = B, Al or Ga), studied by gas-phase electron diffraction, X-ray diffraction and quantum chemical calculations
作者:Derek A. Wann、Frank Blockhuys、Christian Van Alsenoy、Heather E. Robertson、Hans-J?rg Himmel、Christina Y. Tang、Andrew R. Cowley、Anthony J. Downs、David W. H. Rankin
DOI:10.1039/b701476g
日期:——
HC(CH2CH2)3N, has been re-investigated by quantum chemical calculations and by gas-phase electron diffraction (GED). The GED data, together with published rotational constants, have been analysed using the SARACEN method to determine the most reliable structure (rh1) for the gaseous molecule. The structures of two adducts of quinuclidine with group 13 trihydride molecules, MH3 (M = B, Al), have also been determined
Synthesis and characterisation of tetramethylpiperidinyloxide (TEMPO) complexes of group 13 metal hydrides
作者:Cameron Jones、Richard P. Rose
DOI:10.1039/b702641b
日期:——
made to prepare low oxidation state group 13 hydridecomplexes by reacting the metal trihydride–Lewis base adducts, [MH3(quin)] (quin = quinuclidine, M = Al, Ga or In), with reducing or hydrogen abstraction reagents. The 1 : 1 reactions with 2,2′,6,6′-tetramethylpiperidinyl oxide (TEMPO) yield the first structurally characterised nitroxide–group 13 hydridecomplexes, [MH2(quin)(TEMPO)] (M = Al or Ga)
Hydride–bromide exchange at an NHC—a new route to brominated alanes and gallanes
作者:Sean G. Alexander、Marcus L. Cole、Samantha K. Furfari、Marc Kloth
DOI:10.1039/b821367d
日期:——
The reaction of [MH3(Quinuclidine)] (M = Al or Ga) with an air stable dibrominated N-heterocyclic carbene (NHC) affords the hydrideâbromide exchange product [MBr2H(NHC)].
MH3(奎宁环)](M = Al 或 Ga)与空气中稳定的二溴化 N-杂环碳烯(NHC)反应生成氢化物溴化物交换产物[MBr2H(NHC)]。
The reversible synthesis of bis(quinuclidine) alane
method of AlH3 formation is possible using a reversible organometallic synthesis employing catalyzed Al powder, H2, and quinuclidine, or another tertiary amine, as an intermediate step. Additionally, many tertiary amines are known to react directly with AlH3 to form adducts. Previous work indicates that two polymorphs of quinuclidine alane exist, formed using an irreversible process that requires expensive
摘要 氢化铝是一种众所周知的高重量和体积氢密度的材料,因此是一种有吸引力的储氢化合物;然而,它在室温下是热力学不稳定的,需要 7 × 103 bar 的压力才能从 Al 和 H2 重整氢化物。AlH3 形成的另一种方法是使用可逆有机金属合成,使用催化的铝粉、H2 和奎宁环或另一种叔胺作为中间步骤。此外,已知许多叔胺直接与 反应形成加合物。以前的工作表明,奎宁环铝烷存在两种多晶型物,它们使用不可逆过程形成,该过程需要昂贵的起始材料(例如 LiAlH4)。可逆加合物形成的条件在本文中详述,
Atwood, Jerry L.; Butz, Kirk W.; Gardiner, Michael G., Inorganic Chemistry, 1993, vol. 32, # 16, p. 3482 - 3487
作者:Atwood, Jerry L.、Butz, Kirk W.、Gardiner, Michael G.、Jones, Cameron、Kontsantonis, George A.、Raston, Colin L.、Robinson, Kerry D.