Tungstate complexes of all-three alditols HOCH2(CHOH)(n-2)CH2OH (DL-threitol, xylitol, L-iditol, meso-glyceroido-heptitol) have been studied by multinuclear C-13 and W-183 NMR. Contrary to the corresponding molybdate species in which the ligands are always tetradentate, the tungstate species exhibit structural variety, depending on the pH of formation. Only the tungstate complexes (type M) formed at pH 7 are homologous to the molybdate species. At pH 7-9, the ligands are tridentate and chelate a ditungstate group in an asymmetrical way (type T). The corresponding tungstate complex of glycerol is reported for the first time. At pH 9-12, dinuclear species of a previously unknown type P are slowly formed by the pentadentate xylitol and iditol. The heptitol affords two complexes of type P, in which the sites of chelation are HO-2,3,3,5,6 (major complex) and HO-1,2,3,4,5. A possible structure, in agreement with C-13 and W-183 NMR data, is proposed for complexes of type P in which the presence of two WO6 octahedra linked by an edge is reminiscent of structures of ditungstate subunits of polytungstate ions.