Übergangsmetall-Carbin-Komplexe, LXXIY. Synthese thermisch stabiler neutraler Carbin-Carbonyl-Komplexe von Chrom, Molybdän und Wolfram mit den zweizähnigen Liganden 2.2′ -Bipyridyl und 1.10-Phenanthrolin/ Transition Metal Carbyne Complexes, LXXIV. Synthesis of Thermostable Neutral Carbyne Carbonyl Complexes of Chromium, Molybdenum, and Tungsten with the Bidentate Ligands 2,2′-Bipyridyl and 1,10-Phenanthroline

1983 ◽  
Vol 38 (5) ◽  
pp. 587-591 ◽  
Author(s):  
Alexander Filippou ◽  
Ernst Otto Fischer
Keyword(s):  
Transition Metal ◽  
General Formula ◽  
Carbonyl Groups ◽  
Carbonyl Complexes ◽  
Bidentate Ligands ◽  
Carbyne Complexes ◽  
And Tungsten

AbstractReaction of trans-bromotetracarbonyl(phenylcarbyne)-complexes of chromium, molybdenum and tungsten and trans-bromotetracarbonyl(methylcarbyne) complexes of chromium and tungsten with the bidentate ligands 2,2′-bipyridyl and 1,10-phenanthroline results in the replacement of two carbonyl groups leading to very thermostable carbyne complexes with the general formula Br(CO)2LMCR (L: 2,2′-bipy, ophen; M: Cr, Mo, W; R : CH3, C6H5).

Notizen: Übergangsmetall-Carbin-Komplexe, XXIV1 Trans-Bromotetracarbonyl(2-thienyl) carbinchrom und -wolfram / Transition Metal Carbyne Complexes, XXIV1 Trans-Bromotetracarbonyl (2-thienyl)carbyne Chromium and Tungsten

1977 ◽  
Vol 32 (1) ◽  
pp. 105-107 ◽  
Author(s):  
Ernst Otto Fischer ◽  
Tassilo Selmayr
Keyword(s):  
Transition Metal ◽  
Carbyne Complexes ◽  
And Tungsten

Pentacarbonyl[acetoxy(2-thienyl)carbene]-chromium(0) and -tungsten(0) react with BBr3 to give trans-bromotetracarbonyl(2-thienyl)carbyne-chromium and -tungsten.Beim Versuch an Pentacarbonyl(hydroxyphenyloarben)chrom(0)2 mit BBr3 die Hydroxygruppe

3,5-Dimethylpyrazolylphosphine molybdenum(0) and tungsten(0) carbonyl complexes

1980 ◽  
Vol 58 (2) ◽  
pp. 151-158 ◽  
Author(s):  
Harry B. Davis ◽  
James K. Hoyano ◽  
Ping Yuen Leung ◽  
Louis K. Peterson ◽  
Brian Wolstenholme
Keyword(s):  
General Formula ◽  
Metal Atom ◽  
Phosphorus Atom ◽  
Phenyl Ring ◽  
Octahedral Geometry ◽  
Phosphine Ligand ◽  
Carbonyl Complexes ◽  
Coordination Sites ◽  
And Tungsten

Complexes with the general formula [LnM(CO)m], where [Formula: see text] x = 0–2, n = 1 or 2, M = Mo(0) or W(0), m = 3 or 4, were prepared by thermal or photolytic methods by the reaction of the appropriate 3,5-dimethylpyrazolyl phosphine ligand with M(CO)6, norbornadienemetaltetracarbonyl [C7H8M(CO)4], cycloheptatrienylmetaltricarbonyl [C7H8M(CO)3], [(Me2N(CH2)3NMe2)M(CO)4], [(CH3CN)2M(CO)4], or [(CH3CN)3M(CO)3]. Structural evidence indicates octahedral geometry about the metal atom centre, and several modes of coordination for the ligands in those complexes isolated and characterized. For x = 2, the ligand [Formula: see text] was monodentate, via phosphorus in [Formula: see text] and bidentate in [Formula: see text] where coordination by P and the 2N site of the pyrazolyl ring yielded four-membered [Formula: see text] metallocycles. For x = 1, the [Formula: see text] ligand was bidentate, via the phosphorus atom and one of the 2N sites of one of the pyrazolyl substituents, thus giving the four-membered [Formula: see text] metallocycle in [Formula: see text] and tridentate in [Formula: see text] where three facial CO's, two 2N atoms of the pyrazolyl rings, and a part of the phenyl ring occupy the six coordination sites. For x = 0, the P(Me2pz)3 ligand was tridentate via the 2N atoms of all three pyrazolyl rings, thus giving tricyclic systems [P(Me2pz)3M(CO)3] (VIII, IX).

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