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  • NMR spectra  (2)
  • Nitrido ligand  (2)
  • 1
    Electronic Resource
    Electronic Resource
    [Li7(CHPMe2NSiMe3)3(OSiMe2nBu)]2, ein Gemischtligand-Li14-Cluster mit dem Carbdianion (CHPMe2NSiMe3)2- (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1306-1310 
    Details
    ISSN: 0044-2313
    Keywords: Lithium Cluster ; Carbdianion ; NMR spectra ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: [Li7(CHPMe2NSiMe3)3(OSiMe2nBu)]2, a Mixed-Ligand-Li14 Cluster with the Carbdianion (CHPMe2NSiMe3)2-The title compound is formed as colourless moisture and oxygen sensitive crystals by the reaction of [LiCH2PMe2NSiMe3]4 with zinc or cobalt chloride in a toluene suspension in the presence of silicongrease (-OSiMe2-)n and n-butyllithium. It is characterized by multinucleus NMR spectroscopy and by crystal structure determinations of two different crystal individuals.1. Space group P1, Z = 1, lattice dimensions at -70 °C: a = 1272.0, b = 1392.6, c = 1417.6 pm, α = 115.33°, β = 96.75°, σ = 106.81°; R = 0.042.2. Space group P21/n, Z = 2, lattice dimensions at -50 °C: a = 1424.8, b = 1457.1, c = 1997.0 pm, β = 90.32, R = 0.069.
    Notes: Die Titelverbindung (farblose, feuchtigkeits- und sauerstoffempfindliche Kristalle) entsteht bei der Reaktion von [LiCH2PMe2NSiMe3]4 mit wasserfreiem Zink- oder Cobaltchlorid in einer Toluolsuspension in Gegenwart von Siliconfett (-OSiMe2-)n und n-Butyllithium. Sie wird durch Multikern-NMR-Spektroskopie und durch Kristallstrukturanalysen zweier kristallchemisch verschiedener Individuen charakterisiert.1. Raumgruppe P1, Z = 1, Gitterkonstanten bei -70 °C: a = 1272,0; b = 1392,6; c = 1417,6 pm; α = 115,33°; β = 96,75°; σ = 106,81°; R = 0,042.2. Raumgruppe P21/n, Z = 2, Gitterkonstanten bei -50 °C: a = 1424,8; b = 1457,1; c = 1997,0 pm; β = 90,32°; R = 0,069.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976230822
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  • 2
    Electronic Resource
    Electronic Resource
    Synthese und Kristallstrukturen der silylierten Tris-Phosphanimine R—C(CH2PPh2NSiMe3)3 mit R = H und CH3Professor Rudolf Hoppe zum 75. Geburtstag gewidmet (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1739-1743 
    Details
    ISSN: 0044-2313
    Keywords: Silylated λ5-Phosphazenes ; Synthesis ; NMR spectra ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structures of the Silylated λ5-Phosphazenes R—C(CH2PPh2NSiMe3)3 with R = H and CH3The title compounds are obtained by Staudinger reaction from the corresponding tripodal phosphanes R—C(CH2PPh2)3 and trimethylsilylazide. Both complexes are characterized by their IR and NMR spectra and by crystal structure analyses.H—C(CH2PPh2NSiMe3)3 (1): Space group P21/c, Z = 4, structure determination with 7833 independent reflections, R = 0.055. Lattice dimensions at -50°C: a = 1399.5, b = 2311.4, c = 1678.9 pm, β = 112.92°.CH3—C(CH2PPh2NSiMe3)3 (2): Space group P1, Z = 2, structure determination with 9251 independent reflections, R = 0.057. Lattice dimensions at -50°C: a = 1276.5, b = 1386.9, c = 1790.2 pm; α = 85.55°, β = 69.39°, γ = 62.99°.1 and 2 form monomeric molecules which are distinguished by their conformation.
    Notes: Die Titelverbindungen werden durch Staudinger-Reaktion aus den entsprechenden tripodalen Phosphanen R—C(CH2PPh2)3 und Trimethylsilylazid hergestellt und durch ihre IR- und NMR-Spektren sowie durch Kristallstrukturanalysen charakterisiert.H—C(CH2PPh2NSiMe3)3 (1): Raumgruppe P21/c, Z = 4, Strukturbestimmung mit 7833 unabhängigen Reflexen, R = 0,055. Gitterkonstanten bei -50°C: a = 1399,5; b = 2311,4; c = 1678,9 pm; β = 112,92°.CH3—C(CH2PPh2NSiMe3)3 (2): Raumgruppe P1, Z = 2, Strukturbestimmung mit 9251 unabhängigen Reflexen, R = 0,057. Gitterkonstanten bei -50°C: a = 1276,5; b = 1386,9; c = 1790,2 pm; α = 85,55°; β = 69,39°; γ = 62,99°.1 und 2 bilden monomere Moleküle, die sich durch ihre Konformation unterscheiden.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976231112
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  • 3
    Electronic Resource
    Electronic Resource
    Nitrido Complexes of Transition Metals (1992)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 31 (1992), S. 955-978 
    Details
    ISSN: 0570-0833
    Keywords: Transition metals ; Nitrido ligand ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In the past decade new syntheses and numerous structural determinations have enlivened studies in the still relatively young field of nitrido-transition-metal complexes. Aside from the terminal function of the nitrido ligand M≡N:, this group also occurs as linear μ2-bridging ligand in symmetric and asymmetric coordination; examples are known with almost right-angled bridge function; and, finally, it also functions as μ3-bridging ligand. Accordingly, the fresh impulses given to synthetic chemistry by nitrido complexes are also many-sided: such complexes are used, inter alia, for the preparation of phosphaniminato and thionitrosyl complexes as well as for the synthesis of metallaheterocycles of the type MN3S2 and MN3P2 with delocalized π-systems. In technetium chemistry complexes with terminal nitrido group are employed as radiopharmaceuticals, and, owing to the strong trans influence of the M≡N: group, nitrido complexes of molybdenum are suitable as catalysts in olefin metathesis. Finally, nitrido complexes are also of wide interest in theoretical studies.
    Additional Material: 38 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.199209551
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  • 4
    Electronic Resource
    Electronic Resource
    The Transition Metal-Nitrogen Multiple BondDedicated to Professor Josef Goubeau on the occasion of his 80th birthday (1981)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 20 (1981), S. 413-426 
    Details
    ISSN: 0570-0833
    Keywords: Multiple bonds ; Bond theory ; Nitrido ligand ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Numerous nitrido complexes of transition metals show very short metal-nitrogen bond lengths, suggesting M≡N-triple bonds. At present, compounds of this type are being intensively investigated. In particular the molybdenum complexes are considered as model substances for the study of at least an intermediate step of N2-assimilation. This article contains a review of the structure and bonding, as well as syntheses and reactions of these complexes.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.198104133
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