Another rare example of stereoactive lone pair of electrons on six-coordinated bismuth(III) -previously unknown tris(3-hydroxy-2-methyl-4H-pyran-4-onato)bismuth(III) has been synthesized and characterized by spectral methods (IR, UV, 1 Н NMR, 13 С NMR) and singlecrystal X-ray studies. The complex crystallizes in the monoclinic space group P2 1 /n; a =
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