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  • 1985-1989  (2)
  • Chemistry  (2)
  • boranes
  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Polyedrische Ruthenaboran-Chemie: Darstellung, Molekularstruktur und NMR-Eigenschaften der ligandengemischten, elfeckigen isocloso-Verbindung [1,1-(PMe3) (PPh3)-closo-1-RuB10H8-2,3-(OEt)2]Umsetzung von [1,1-(PPh3)2-closo-1-RuB10H8 -2,3-(OEt)2]1) 1 mit dem basischeren Liganden PMe3 ersetzt leicht das PPh3 unter Bildung der bisher nicht mitgeteilten ligandengemischten Verbindung [1,1-(PMe3) (PPh3)-closo-1-RuB10H8-2,3-(OEt)2] 2, die durch Einkristall Röntgen-Analyse charakterisiert wird. Die Kristalle sind monoklin, Raumgruppe P21, mit a = 1059,2(2), b = 1291,5(2), c = 1187,6(2) pm, β = 91,56(1)°, Z = 4; dem endlich R = Faktor von 0,0198 für 3303 beobachtete Reflexe [I〉2,0 s̰(I)]. Verbindung 2 wird ferner charakterisiert durch detaillierte Mehrkern-, Mehrfachresonanz- und Mehrdimensionale-NMR-Spektroskopie (1H, 1H-{11B}, [1H-1H] {11B}-COSY, 11B-{1H} und 31P).
    Notes: Treatment of [1,1-(PPh3)2-closo-1-RuB10H8-2, 3-(OEt)2]1) 1 with the more basic ligand PMe3 readily results in the displacement of PPh3 to form the hitherto unreported mixed ligand compound [1,1-(PMe3) (PPh3)-closo-1-RuB10H8-2, 3-(OEt)2] 2, which is characterized by singlecrystal X-ray diffraction analysis. Crystals are monoclinic, space group P21, with a = 1059.2(2), b = 1291.5(2), c = 1187.6(2) pm, β = 91.56(1)°, Z = 4; the final R factor is 0.0198 for 3303 observed reflections [I〉2.0 s̰(I)]. Compound 2 is also characterized by detailed multielement, multiple resonance, and multidimensional n.m.r. spectroscopy (1H, 1H-{11B}, [1H-1H]{11B}-COSY, 11B, 11B-{1H}, and 31P).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0749-1581
    Keywords: closo-Metalladicarbaborane ; 11B assignments ; Proton-boron shift correlation ; Ruthenium ; Cluster ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The cluster 11B chemical shifts in members of the important class of closo-3,1,2-metalladicarbaboranes were previously unassigned, and their cluster 1H chemical shifts previously unmeasured. The use of [11B—11B]-COSY and 1H-{11B} NMR spectroscopy to measure and assign the cluster 11B and 1H chemical shifts of (previously unreported) [3-(η6-C6Me6)-closo-3,1,2-RuC2B9H11] as a model compound is reported. The 11B shielding patterns of this species and the nonmetalla simple carbaborane analogue [1,2-C2B10H12] are compared and briefly discussed.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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