Polyol–Metal Complexes. 26. A Three-Dimensional Triply-Connected Alkoxo–Metal Net in a Carbohydrate–Bismuth(III) Complex

A sodium (methyl-α-D-mannopyranosidato)bismuthate(III) hydroxide hydrate of formula Na₂[Bi_5/3(Me-α-D-Manp2,3,4H₋₃)₂](OH).12H₂O, (I) (where Me-α-D-Manp2,3,4H₋₃ is C₇H₁₁O₆) forms cubic crystals from alkaline aqueous solution. The carbohydrate-supported alkoxo–bismuth network of (I) resembles the silicon network in SrSi₂ [Pringle (1972). Acta Cryst. B28, 2326–2328], which is a 3,10-net according to Wells [Structural Inorganic Chemistry (1990), 5th ed., pp. 110–111. Oxford: Clarendon Press]. The mannoside residues act as trianionic triolate ligands with the O2, O3 and O4 atoms deprotonated.

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