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'Gallium Diolates' in keywords Facet   section ZfN Section B  [X]
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2001 (1)
1Author    EvaS. Schmidt, Annette Schier, NorbertW. Mitzel, Hubert SchmidbaurRequires cookie*
 Title    A Simple High-Yield Synthesis of Gallium(I) Tetrachlorogallate(III) and the Reaction of Digallium Tetrachloride Tetrahydrofuran Solvate with 1,2-Diols  
 Abstract    Gallium(I) tetrachlorogallate(III) Ga[GaCU] was prepared in quantitative yield by thermal de­ composition of dichlorogallane [HGaChk, which is readily available from EtsSiH and [GaCl3]2. The reaction of catechol with solutions of this gallium(I) tetrachlorogallate(III) in tetrahydro­ furan leads to the evolution o f hydrogen gas and affords a dinuclear gallium(III) complex with penta-coordinate metal atoms chelated and bridged by mono-deprotonated catechol ligands. In the crystalline phase tetrahydrofuran molecules are hydrogen-bonded to the hydroxy groups: [G a(l,2 -0 CöH4 0 H)Cl2(C4H8 0)]2. The reaction with pinacol also gives hydrogen and the anal­ ogous product [Ga(0 CMe2CMe2 0 H)Cl2(C4Hg0)]2. The structures of the two compounds have been determined by X-ray diffraction. A mechanism of the new reaction has been proposed which involves oxidative addition of the diol to the solvate (THF)Cl2Ga-GaCl2(THF) present in the tetrahydrofuran solution to give a gallium hydride intermediate. 
  Reference    Z. Naturforsch. 56b, 337—341 (2001); received March 23 2001 
  Published    2001 
  Keywords    Gallium Halides, Gallium Diolates, Oxidative Addition 
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 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0337.pdf 
 Identifier    ZNB-2001-56b-0337 
 Volume    56