Five novel organotin complexes with the anthraquinone dyes alizarin (1,2-dihydroxyanthraquinone) and purpurin (1,2,4trihydroxyanthraquinone) were synthesized and characterized by elemental analyses, FTIR and NMR spectroscopy ( 1 H, 13 C and 119 Sn). The crystal and molecular structures of four complexes were determined by X-ray diffraction on single crystals: [Bu 2 Sn(aliz)(H 2 O)] · C 2 H 5 OH (A1 · EtOH), [Bu 2 Sn(aliz)(dmso)] 2 (A3), [(Bu 2 Sn) 3 O(Hpurp) 2 ] (P1) and [Bu 2 Sn(Hpurp)(dmso)] 2 (P2), where H 2 aliz ϭ alizarin and H 3 purp ϭ purpurin.
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