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  • 1
    Electronic Resource
    Electronic Resource
    Eine einfache Synthese von dimetallischen Zirconium/Aluminium-Verbindungen mit planar-tetrakoordiniertem Kohlenstoff (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 1953-1956 
    Details
    ISSN: 0009-2940
    Keywords: Zirconium-aluminium dimetallic complexes ; Carbon, planar-tetracoordinate ; μ-Alkyne complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A Simple Synthesis of Dimetallic Zirconium/Aluminium Compounds Containing Planar-Tetracoordinate Carbon(η2-Alkyne)(trimethylphosphane)zirconium complexes [alkyne = cyclohexyne (3a) or diphenylacetylene (3b)] react with diisobutylaluminium hydride at room temperature by PMe3 cleavage and addition of H—Al(isobutyl)2 to the in situ-generated (η2-alkyne)ZrCp2 intermediate to give the dimetallic Zr,Al compounds 4. These thermodynamically stable complexes contain a planar-tetracoordinate carbon center whose uncommon coordination geometry is stabilized by a combination of the s̰-donor interaction with both electropositive metals and the π-conjugation of the Zr—C = C moiety.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250823
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Dynamic Behavior of Anionic Binuclear Helicate- and meso-Helicate-Type Coordination Compounds (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 615-619 
    Details
    ISSN: 0009-2940
    Keywords: Self-assembly ; NMR spectroscopy ; Titanium ; Catechol ligands ; Helical structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The racemization/symmetrization of helicate- or meso-helicate-type dinuclear titanium(IV) complexes Mn[(ligand)3Ti2] (n = 4: M = Li, Na, K, Cs; n = 2: M = Ca, Sr), which are formed by metal-directed self-assembly of alkyl-bridged bis(catecholate) ligands in the presence of basic alkali-metal or alkaline-earth metal salts, can be monitored by dynamic NMR spectroscopy. The free-energy barrier (ΔG
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971300512
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Self-Assembly of a Triple-Stranded meso-Helicate from Two Iron(II) Ions and Three [CH2]3-Bridged Bis(2,2′-bipyridine) Ligands (1996)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 129 (1996), S. 829-832 
    Details
    ISSN: 0009-2940
    Keywords: Self-assembly ; meso-Helicate ; Binuclear coordination compounds ; 2,2′-Bipyridines ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1,3-Bis(5′-methyl-2,2′-bipyrid-5-yl)propane (3) can be synthesized by a two-step procedure starting from 3-picoline (1). In a spontaneous self-assembly process 3 forms the binuclear triple-stranded meso-helicate [(3)3Fe2][PF6]4 on addition of iron(II) salts. The (Λ,Δ) structure can be shown by symmetry considerations based on NMR spectroscopy and is due to the conformational restrictions of the [CH2]3 spacer.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19961290714
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    Paper (German National Licenses)
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