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  • 1
    Electronic Resource
    Electronic Resource
    Tripodal Triamidostannates as Building Blocks in the Generation of Sn - M-Bonded Heterobimetallics (M = Fe, Ru) (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 29-34 
    Details
    ISSN: 0009-2940
    Keywords: Tripodal ligands ; Triamidostannates ; Metal-metal bonds ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: By in situ lithiation of the trifunctional amines H3CC(CH2NHSiMe3)3, PhC(CH2NHSiMe3)3, and HC{SiMe2NH(p-Tolyl)}3 and subsequent reaction with SnCl2 the corresponding triamidostannates were obtained. These were coupled with CpM(CO)2Cl (M = Fe, Ru) to yield the M - Sn-bonded heterobimetallics 9-14 of which H3CC(CH2NSiMe3)3SnFe(CO)2Cp (9) was characterized by a single-crystal X-ray structure analysis. Of the in situ-generated amidostannates only [HC{SiMe2N(p-Tolyl)}3Sn][Li(THF)3] (8) could be isolated as a uniform product and characterized analytically and spectroscopically.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280105
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  • 2
    Electronic Resource
    Electronic Resource
    Titanium and Zirconium Complexes Containing a Novel Dianionic Trifunctional Amido Ligand (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 1751-1759 
    Details
    ISSN: 0009-2940
    Keywords: Amido complexes ; Titanium ; Zirconium ; Alkylmetal compounds ; Amido complexes ; Titanium ; Zirconium ; Alkylmetal compounds ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The novel tridentate diamidoamine ligands [RC(2C5H4N)(CH2NSiMe3)2)2- (R = H, CH3) have been synthesized and coordinated to TiIV giving the pentacoordinate complexes [MX2(RC(2-C5H4N)(CH2NSiMe3)2}] (M = Ti, Zr; X = Cl, Br). The crystal structure analysis of [TiBr2{HC(2-C5H4N)(CH2)2}] (M = Ti, Zr; X = Cl, Br). The crystal structure analysis of [TiBr2{HC(2-C5H4N)(CH2NSiMe3))] (10b) confirmed the involvement of the pyridyl function in the coordination to the meta centre occupying an apical position in the trigonal bipyramidal ligand polyhedron. alkylation of [TiCl2{H3CC(2-C5H4N)(CH2NSiMe3)2)] (12a) with one or two molar equivalents of [RMgCl](R = PhCH2, Me3SiC2) yielded the mono- and dialkyl complexes [TiClR{H3CC(2-C5H4N)(CH2NSiMe3)2)] and [TiR2(H3CC(2-C5H4N)(CH2NSiMe3)2)] and [TiR2(H3CC(2-C5H4N)(CH2NSiMe3)2}] in good yields. Depending on the steric demand of the alkyl group coordination or decoordination of the pyridyl group leads to four- or five-coordinate species. A crystal structure analysis of the pentacoordinate complex [TiCl(CH2SiMe3){H3CC(2-C5H4N)(CH2NSiMe3)2}] (16) was carried out.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971301208
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  • 3
    Electronic Resource
    Electronic Resource
    Structures, Dynamics, and Reactivity of Tripodal Amido Ligands Coordinated to TiIV Centres (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 1797-1805 
    Details
    ISSN: 0009-2940
    Keywords: Titanium amido complexes ; Tripodal ligands ; Ligand dynamics ; μ2-Imido complex ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A new class of amido titanium(IV) halides containing tripodal ligands H3CC(CH2NR)3TiX (R = Me, X = Cl: 1; R = Me3Si, X = Cl: 2a, Br: 2b; R = SiMe2tBu, X = Cl: 3a, Br: 3b) has been synthesised. Compound 1 has been structurally characterised by X-ray crystallography and found to be dimeric in the crystal displaying an idealised C2 symmetry with bridging amido functions linking the two halves of the molecule. The dimeric structure is retained in solution as has been shown by 1H- and 13C-NMR spectroscopy which has also revealed a high degree of ligand dynamics, effecting the interconversion of the two enantiomeric forms of the molecule. This process has been investigated by variable temperature NMR studies and phase-sensitive 1H-NOESY/EXSY spectra. The dimeric μ-imido complexes [H3CC(CH2NSiMe3)2 (H)CH2NTiX]2 (X = Cl: 4a, Br: 4b) have been isolated as a byproduct in the synthesis of 2a/b, and a single-crystal X-ray structure analysis of 4a has established its molecular structure.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260807
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  • 4
    Electronic Resource
    Electronic Resource
    Controlled Hydrolysis of Tripodal Titanium Amido Halides: The Influence of the Ligand Periphery upon the Basicity of the Amido-N FunctionsDedicated to Professor Dr. Markus Wieber on the occasion of his 60th birthday. (1996)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 129 (1996), S. 1287-1291 
    Details
    ISSN: 0009-2940
    Keywords: Titanium amido complexes ; Tripodal ligands ; μ-Oxo complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Hydrolysis of the tripodal amidotitanium halides H3CC(CH2NSiMe3)3TiX (X = Cl: 1a; Br: 1b) in the presence of Et3N affords the linear μ-oxo-bridged complex [H3CC(CH2NSiMe3)3Ti]2 (μ-O) (3) which was characterized by X-ray crystallography. Treatment of H3CC(CH2NiPr)3TiX (X = Cl: 2a; Br: 2b), obtained in low yields, under the same conditions only leads to decomplexation of the amido ligand. Under conditions of very slow exposure to H2O the primary addition product of water across two Ti-N bonds in 2a could be isolated and was characterized as [H3CC(CH2-i(μ-Cl)]2(μ-O) (4), the crystal structure analysis establishing a triply bridging central Ti(μ-O)(μ-Cl)2 Ti unit. Deprotonation with two molar equivalents of nBuLi and subsequent LiCl elimination afforded the μ-oxo complex [H3CC(CH2NiPr)3Ti]2(μ-O) (5).
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19961291023
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