ZfN: Search Results

1	Author	Hans-Friedrich Klein, Stefan Haller3, Hongjian Sun3, Xiaoyan Li3, Thomas Jung3, Caroline Röhrb, Ulrich Flörkec, Hans-Jürgen Haupt0	Requires 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

2	Author	Hans-Friedrich Klein, Stefan Haller3, Hongjian Sun3, Xiaoyan Li3, Thomas Jung3, Caroline Röhrb, Ulrich Flörkec, Hans-Jürgen Hauptc	Requires 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