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  • FAB mass spectra  (1)
  • 1
    ISSN: 0044-2313
    Keywords: Nickel(II) chelates ; syntheses ; crystal structures ; FAB mass spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Di- and Trinuclear Nickel(II) Chelates of Bis-bidentate N-AcylselenoureasBis-bidentate isophthaloyl-bis(selenoureas) form with nickel(II) ions under deprotonating conditions macrocyclic dinuclear metal chelates. This was confirmed by X-ray crystal structure analysis of the cyclo-di[nickel-μ-[1,1,1′,1′-tetraisobutyl-3,3′-iso-phthaloyl-bis-selenoureato(2-)Se,O:O′, Se′]], 2. The compound 2 crystallizes in the monoclinic space group P 21/c with a = 11.673 (1); b = 19.834 (2); c = 13.606 (1) Å; β = 107.45 (1)° and Z = 2. The final R value was R = 0.081 for 3049 observed reflections.Bis-bidentate terephthaloyl-bis(selenoureas) give under the same conditions macrocyclic trinuclear nickel(II) chelates.Both types of the complexes are characterized by FAB mass spectra.
    Notes: Bis-bidentate Isophthaloyl-bis(selenoharnstoffe) bilden mit Nickel(II)-Ionen unter deprotonierenden Bedingungen makrocyclische Zweikernchelate. Dies wurde durch Röntgenkristallstrukturanalyse des cyclo-Di[nickel-μ-[1,1,1,′,1′-tetraisobutyl-3,3′-iso-phthaloyl-bisselenoureaoto(2-)-Se, O:O′, Se′]], 2, bestätigt. Die Verbindung 2 kristallisiert monoklin in der Raumgruppe P 21/c mit den Gitterkonstanten a = 11,673 (1); b = 19,834 (2); c = 13,606 (1) Å; β = 107,45 (1)° und Z = 2. Der abschließende R-Wert betrug R = 0,081 für 3049 beobachtete Reflexe. Bis-bidentate Terephthaloyl-bis(selenoharnstoffe) ergeben unter den gleichen Bedingungen makrocyclische Dreikernnickel(II)-chelate.Beide Komplextypen wurden durch FAB-Massenspektren charakterisiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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