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'Hard Soft Chelating Ligands' in keywords
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1998 (2)
1Author    Hans-Friedrich Klein, Stefan Haller3, Hongjian Sun3, Xiaoyan Li3, Thomas Jung3, Caroline Röhrb, Ulrich Flörkec, Hans-Jürgen Haupt0Requires cookie*
 Title    Hydrido(acylphenolato)cobaIt(III)-Verbindungen mit Trimethylphosphan-Liganden Hydrido(acylphenolato)cobalt(III) Compounds Containing Trimethylphosphane Ligands  
 Abstract    Salicylaldehyde derivatives and related ß-hydroxo aldehydes CHO-CR=CR'-OH react with CoMe(PMe3)4 via oxidative substitution to form low-spin d6 complexes mer-CoH(CO-CR=CR-0)(PM e3)3. Reductive elimination of acyl and hydride functions from cis positions at the metal is less favourable than in carbonyl cobalt intermediates through a pronounced stabilization by neutral phosphane cr-donor and dianionic acylenolato chelate ligands. Reactions of the hydride complexes with iodomethane or with protic acids HX afford octahedral molecular complexes raer-CoX(CO-CR=CR'-0)(PMe3)3 (X =1, OAc) and mer-CoX(CO-CR=CR'-0)(PMe3)2 (X = OAc, 0-C R '=CR-CH0) without opening of the acylenolato chelate ring. 
  Reference    Z. Naturforsch. 53b, 587—598 (1998); eingegangen am 27. Januar 1998 
  Published    1998 
  Keywords    Acylcobalt(III) Complexes, Reactions, Structure, Hard-Soft Chelating Ligands 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0587.pdf 
 Identifier    ZNB-1998-53b-0587 
 Volume    53 
2Author    Hans-Friedrich Klein, Stefan Haller3, Hongjian Sun3, Xiaoyan Li3, Thomas Jung3, Caroline Röhrb, Ulrich Flörkec, Hans-Jürgen HauptcRequires cookie*
 Title    Halogeno(acylphenolato)cobalt(III)-Verbindungen mit Trimethylphosphan-Liganden Halogeno(acylphenolato)cobalt(III) Compounds Containing Trimethylphosphane Ligands  
 Abstract    Complexes raer-CoH(CO-CR=CR'-0)(PMe3)3 react with haloalkanes RX (X = Br, I) or with acids HX (X = Cl, Br) under elimination of dihydrogen. In both reactions a change of configu­ ration at the metal is brought about by directional steering through the hard/soft (acyl)enolato chelate ligands to form octahedral complexes raer-CoX(CO-CR=CR'-C))(PMe3)3 or sterically crowded ionic compounds [Co(CO-CR=CR'-0)(PMe3)4(3)]+ X-(X = C104) without opening of the (acyl)enolato chelate ring. 
  Reference    Z. Naturforsch. 53b, 856—864 (1998); eingegangen am 4. Mai 1998 
  Published    1998 
  Keywords    Acylcobalt(III) Complexes, Reactions, Structure, Hard-Soft Chelating Ligands 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0856.pdf 
 Identifier    ZNB-1998-53b-0856 
 Volume    53