Organotin Complexes of Alizarin and Purpurin
| Autor: | Claudia C. Gatto, Sebastia–o S. Lemos, Javier Ellena, Karl E. Bessler, Adriana Torres de Sousa |
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| Rok vydání: | 2009 |
| Předmět: |
Stereochemistry
chemistry.chemical_element Nuclear magnetic resonance spectroscopy ESPECTROSCOPIA DE RESSONÂNCIA MAGNÉTICA NUCLEAR Alizarin Anthraquinone Inorganic Chemistry Crystal Crystallography chemistry.chemical_compound Pentagonal bipyramidal molecular geometry chemistry Chelation Fourier transform infrared spectroscopy Tin |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1521-3749 0044-2313 |
| Popis: | Five novel organotin complexes with the anthraquinone dyes alizarin (1,2-dihydroxyanthraquinone) and purpurin (1,2,4-trihydroxyanthraquinone) were synthesized and characterized by elemental analyses, FTIR and NMR spectroscopy (1H, 13C and 119Sn). The crystal and molecular structures of four complexes were determined by X-ray diffraction on single crystals: [Bu2Sn(aliz)(H2O)]·C2H5OH (A1·EtOH), [Bu2Sn(aliz)(dmso)]2 (A3), [(Bu2Sn)3O(Hpurp)2] (P1) and [Bu2Sn(Hpurp)(dmso)]2 (P2), where H2aliz = alizarin and H3purp = purpurin. The coordination mode of the ligands is identical to that found in their Al/Ca complexes, where they act as dianionic tridentate ligands forming five and six-membered fused chelate rings. The coordination to the tin atoms occurs exclusively via the 1,2- phenolate oxygen and the adjacent quinoid oxygen atoms. The complexes A1, A3 and P1 are dimers with hepta-coordinated tin atoms in form of a slightly distorted pentagonal bipyramid. The trinuclear complex P2 contains two pentacoordinated and one heptacoordinated tin atoms. |
| Databáze: | OpenAIRE |
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