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  • Intramolecular C=C bond coordination  (2)
  • Asymmetric hydrogenation catalysts  (1)
  • Bulky phenols  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Functionalized cyclopentadienyl ligands, III. Preparation of cobalt half-sandwich complexes with intramolecular C=C bond coordination (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 1641-1648 
    Details
    ISSN: 0009-2940
    Keywords: Cyclopentadienyl ligand, functionalized ; Half-sandwich complexes ; Cobalt complexes ; Intramolecular C=C bond coordination ; Reductive complexation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Thermolysis of [1-(3-butenyl)-2,3,4,5-tetramethylcyclopentadienyl]carbonyldiiodocobalt, (η5-C5Me4CH2CH2CH=CH2)-Co(CO)I2 (2), in boiling octane affords the dimeric diiodide [(η5-C5Me4CH2CH2CH=CH2)-COI2]2 (3) without any interference of the 3-butenyl chain with the cobalt center. 2 reacts with various two-electron ligands L (L=P(OMe)3, P(OPh)3, PPh3, PMe3, PMe2Ph, tBuNC] to give a series of cobalt(III) complexes of the general formulae (η5-C5Me4CH2CH2CH=CH2)-Co(L)I2 (4-9). Sodium amalgam reduction of these “open-chain” complexes 4-9 yields novel cobalt(1) complexes containing an intramolecularly coordinated C=C bond (η5:η2-C5Me4CH2CH2CH=CH2)-Co(L). For L=CO (12), P(OMe)3 (13), and P(OPh)3 (14) low-melting crystals are isolated and fully characterized by analytical and spectroscopic methods.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19901230809
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and Characterization of Mononuclear Titanium Complexes Containing a Bis(phenoxy) Ligand Derived from 2,2′-Methylene-bis(6-tert-butyl-4-methylphenol) (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 221-227 
    Details
    ISSN: 0009-2940
    Keywords: Titanium complexes ; Bidentate phenoxy ligands ; Bulky phenols ; Lewis acidity ; Pentacoordination ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A series of new titanium complexes of the general type Ti(mbmp)X2 (X = Br, I; OMe, OiPr, OtBu), containing a bidentate bis(phenoxy) ligand derived from 2,2′-methylenebis(6-tert-butyl-4-methylphenol) (mbmpH2), was prepared. The 1H-chemical shifts for the protons of the methylene link were found to vary considerably as a function of the ligand X. Reaction of Ti(OiPr)4 with two equivalents of mbmpH2 gave the C2-symmetric spiro-titanate complex Ti(mbmp)2. The crystalline labile solvent adducts of the dichloro complex Ti(mbmp)Cl2 with THF and DME were isolated and characterized. A single-crystal X-ray structural analysis revealed the THF adduct to be a mono(THF) adduct with a trigonal-bipyramidal configuration, the bidentate mbmp ligand spanning an apical and equatorial site and the THF ligand occupying the remaining apical position.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280304
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  • 3
    Electronic Resource
    Electronic Resource
    Functionalized cyclopentadienyl ligands, II: Synthesis of a cobalt half-sandwich complex with intramolecular C—C double-bond coordination (1989)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 122 (1989), S. 1645-1647 
    Details
    ISSN: 0009-2940
    Keywords: Cobalt carbonyl complexes ; Cyclopentadienyl ligand, functionalized ; Intramolecular C=C bond coordination ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis of 1-(3-butenyl)-2,3,4,5-tetramethylcyclopentadienyl cobalt complexes without and with intramolecular C-C double-bond coordination is reported.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19891220908
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  • 4
    Electronic Resource
    Electronic Resource
    Optically Active Titanium Complexes Containing Linked Amido-cyclopentadienyl Ligands: Their Use as Asymmetric Hydrogenation Catalysts (1996)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 129 (1996), S. 1429-1431 
    Details
    ISSN: 0009-2940
    Keywords: Titanium complexes ; Amido-cyclopentadienyl ligand ; Optically active complexes ; Asymmetric hydrogenation catalysts ; Conformational rigidity ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Optically active titanium complexes of the formula Ti(η5:η1-C5R4SiMe2NCHMePh)Cl2 (R = H, Me), containing the cyclopentadienyl ligand linked to a chiral 1-phenylethylamido moiety, were synthesized and characterized in both enantiomerically pure forms. A single-crystal X-ray structural analysis of (S)—(—)Ti(η5:η1-C5H4SiMe2NCHMePh)Cl2 shows a conformation in which the phenyl group is turned away from the metal center. NOE measurements suggest that a related structure is retained in solution. Upon activation with n-butyllithium, these complexes show hydrogenation activity toward imines with slight enantioselectivity.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19961291205
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