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Abstract
The heterometallic polymeric cluster Na2[AlW3O4 (O2CEt)8]2 (1) has been prepared by reaction of W(CO)6 and NaWO4·2H2O with AlCl3 at 120°C in propionic anhydride and characterized by X-ray crystallography, with the following crystal data: triclinic, space group P1, a = 12.205(5), b = 13.032(4), c = 13.925(3) Å, α = 90.21(3)°, β = 109.53(5)°, γ = 117.26(6)°, V = 1822.8(1)Å3, Z = 1, R = 0.038 and Rw = 0.101. The structure consists of two triangular [W3O4(O2CEt)8]4− cluster unit, which act as polydenate ligands to link Al3+ and Na+ ions forming a one–dimensional chain structure. IR spectra show characteristic [W3O4]4+ bands at 746–815 cm−1. Thermal analysis reveals that the complex is air stable up to 250°C. Cluster 1 decomposes in hot aqueous 2 M HCl solution to produce discrete [W3O4]4+ units.