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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 406 (1974), S. 124-128 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: UV-spektroskopische Untersuchung von Metall-Biguanidin-KomplexenAus der UV-spektroskopischen Untersuchung einer Reihe von Metall-Biguanidinen wurde versucht, eine Wechselwirkung zwischen dem vollem Liganden-Orbital und dem leeren Metall-Orbital zu finden, das zum Ansteigen der Delokalisierung des Elektronensystems der ganzen Molekel führen könnte. Diese Art der Wechselwirkung könnte einen aromatischen Charakter im Metall-Biguanidin-Ring hervorrufen. Der benzoide Charakter der Metall-Acetylacetonate stellt eine Parallele zu dem der Metall-Biguanidine dar. Die Untersuchung der Metall-Biguanidine im UV zeigt, daß es klare Hinweise für die Überlappung der Liganden- und Metall-Orbitale gibt, die mit einer Verschiebung der Absorptionsbanden verbunden ist.
    Notes: From the U.V. spectra study of series of metal biguanides, attempt has been made to find out any interaction between the filled ligand orbital with the vacant metal orbital which may give rise to delocalisation of electron system over the whole complex molecule. This type of interaction may develop aromatic character in metal biguanide ring. The benzenoid character of the metal acetylacetonate can be cited as parallel to that of the metal biguanide. The U.V. study of metal biguanides concludes that there is a definite indication of the suggested overlap of the ligand and metal orbitals with consequent shifting of absorption bands with different substitutions.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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