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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1708-1714 
    ISSN: 0044-2313
    Keywords: Indium(III) phthalocyanines, nitrito-O,O′ complexes ; cyclic voltammetry ; optical spectra ; vibrational spectra ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: InIII-Phthalocyanines: Synthesis, Properties, and Crystal Structure of Tetra(n-butyl)ammonium-cis-di(nitrito-O,O')phthalocyaninato(2-)indate(III)[In(Cl)Pc2-] reacts with (nBu4N)NO2 in acetone yielding green-blue (nBu4N)cis[In(NO2)2Pc2-], which crystallizes in the monoclinic space group P21/n (No. 14). Both nitrite anions are coordinated as chelating nitrito-O,O'(NO2) ligands to InIII in cis-geometry. Consequently InIII is octa-coordinated within a distorted “quadratic” antiprism and directed towards the Pc2--ligand. One of the NO2 ligands has equivalent N—O bonds similar to free nitrite, while the other has asymmetric N—O bonds. Both (In,O,N,O) rings are approximately planar with a dihedral angle of 80°. The Pc2- ligand is distorted in an asymmetrically convex manner. Partially overlapping pairs of Pc2- ligands related by an inversion center form double layers, which are separated by layers containing the (nBu4N)+ cations. The cyclic voltammogram shows three electrode processes, which are assigned to the redox pairs: Pc3-/Pc2- (-0.94 V) 〈 InI/InIII (-0.78 V) 〈 Pc2-/Pc- (0.64 V). The UV-VIS-NIR spectra and vibrational spectra are discussed.
    Notes: [In(Cl)Pc2-] bildet mit (nBu4N)NO2 in Aceton grün-blaues (nBu4N)cis[In(NO2)2Pc2-], welches monoklin kristallisiert (RG.: P21/n (14)). Die Nitrit-Anionen sind als chelatbildende Nitrito-O,O′ (NO2)-Liganden an InIII in cis-Koordination gebunden. Infolgedessen ist InIII oktakoordiniert und befindet sich in einem verzerrten “quadratischen” Antiprisma auf der dem Pc2--Liganden zugewandten Seite. Einer der (NO2)-Liganden hat ähnlich wie freies Nitrit äquivalente N—O-Bindungen, der andere nichtäquivalente. Beide (In,O,N,O)-Ringe sind nahezu planar (Diederwinkel: 80°). Der Pc2--Ligand ist unsymmetrisch konvex verzerrt. Partiell überlappende Paare einander zugewandter Pc2--Liganden bilden von den (NO2)-Liganden begrenzte Doppelschichten, die von den die (nBu4N)+-Kationen enthaltenden Schichten getrennt sind. Das Zyklovoltammogramm von cis[In(NO2)2Pc2-]- zeigt drei Elektrodenprozesse, die den Redoxpaaren: Pc3-/Pc2- (-0,94 V) 〈 InI/InIII (-0,78 V) 〈 Pc2-/Pc- (0,64 V) zugeordnet werden. Die UV-VIS-NIR- und Schwingungsspektren werden diskutiert.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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