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  • Title: Structure of a terbium(III)-quinizarine complex: the first crystallographic model for metalloanthracyclines.
    Author: Di Vaira M, Orioli P, Piccioli F, Bruni B, Messori L.
    Journal: Inorg Chem; 2003 May 19; 42(10):3157-9. PubMed ID: 12739953.
    Abstract:
    The crystal structure of a complex of terbium(III) with quinizarine 2-sulfonate has been solved by single-crystal X-ray diffraction methods. The metal cation is coordinated by two adjacent phenolate and quinone oxygens of the anthraquinone moiety of a quinizarine sulfonate anion and by six water molecules. To our knowledge, this is the first structure of a metal complex of the 1,4-dihydroxy anthraquinone ligand. On the basis of strict similarities in the spectroscopic features of the terbium adducts with either doxorubicin or quinizarine 2-sulfonate, the present structure is proposed as a model for the metal complexes of anthracyclines.
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