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  • Analytical Chemistry and Spectroscopy  (1)
  • Decavanadate  (1)
  • 1
    Electronic Resource
    Electronic Resource
    A Decavandate Sandwiched by Diprotonated Cryptands-222: Model for the Vanadate-Ionophore Interaction (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 1123-1127 
    Details
    ISSN: 0009-2940
    Keywords: Vanadium ; Cryptands ; Ionophors ; Phosphatases ; Decavanadate ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Treatment of a C222-vanadyl-AMP complex (C222 = cryptand-222, AMP = adenosine monophosphate) with Me2NH in the presence of air yielded centrosymmetric dihydrogen-decavanadate H2V10O428, sandwiched by two diprotonated C222 molecules. An X-ray crystal-structure analysis was performed of this compound with the overall composition [C222(H+)2]2[H2V10O28] · 2 1/2, H2O. Protonation sites in the anion are μ2-oxygen atoms linking two different vanadium centres. Protonation sites at the cryptand are the nitrogen and/or oxygen atoms of one of the -[CH2]2O[-CH2|2O|CH2]- bridges. The relevance of the compound for the stabilisation and transport of the kinase and phosphatase inhibitor decavanadate by biogenic ionophores is addressed.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971300814
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Deuterium isotope effects and bonding in carbonylvanadium complexes (1990)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 28 (1990), S. 138-144 
    Details
    ISSN: 0749-1581
    Keywords: 2H, 13CO, C18O isotope shifts ; 51V shielding ; Carbonylvanadium complexes ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The effects of one-bond and two-bond 2H, 13CO and C18O isotope shifts on 51V shielding in various carbonyl-Cp-vanadium complexes (Cp = n5-cyclopentadienyl) are reported and discussed with respect to the sensitivity of 51V shifts to bond extensions, and the rovibrationally averaged values of such bond extensions. These isotope effects provide some insight into the bonding situation in these complexes. It is shown that the rate-determining step in the reaction between V(CO)6 and C5H5D, which leads to CpV(CO)4, is not subject to a kinetic isotope effect. The deuterium solvent isotope effects on 51V shielding in [V(CO)6]- and [VO4]3- are also investigated.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260280209
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    Paper (German National Licenses)
    Fulltext
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