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  • 1
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Complexes of Tetrapyrrole Ligands, XVII: Octacoordinate Zirconium and Hafnium Porphines Containing Axial 1,3-Diketonate LigandsNew (1,3-diketonato)Metalloporphyrins Zr(OÄP)(acac)2 (3a), Hf(OÄP)-(dbm)2 3c, Hf(OÄP)(dbm)2 (3d), and Zr(OÄP)(acac)OPh (5)2 are prepared and characterized spectroscopically. By analogy to the structurally secured acetato complexes, e. g. Zr(OÄP)(OAc)2 (2a), the central metal ions in 3a-d are regarded as octacoordinate with bidentate axial ligands. This follows from the i.r. and 1H n.m.r. spectra. The cis-configurations 3A of 3a-d and 5A are compared with the configuration 1A, 2A, and 4A of related species.
    Notes: Neue (1,3-Diketonato)metallporphyrine Zr(OÄP)(acac)2 (3a), Hf(OÄP)(acac)2 (3b), Zr(OÄP)-(dbm)2 (3c), Hf(OÄP)(dbm)2 (3d) und Zr(OÄP)(acac)OPh (5) 2 werden dargestellt und spektroskopisch charakterisiert. In Analogie zu den strukturell gesicherten Acetatkomplexen, z. B. Zr(OÄP)(OAc)2 (2a), wird den Zentralmetall-lonen in 3a-d die Koordinationszahl 8 mit zweizähnig gebundenen Axial-Liganden zugeschrieben. Dies ergibt sich aus den IR- und 1H-NMR-Spektren. Die cis-Konfigurationen 3A von 3a-d und 5A werden mit den Konfigurationen 1A 2A und 4A einiger verwandter Spezies verglichen.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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