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A new organic-inorganic hybrid sandwich-type polyoxotungstate [Cu(dien)-(H_2O)_2]_2[{Cu(dien)(H_2O)}_3{Cu_(4.5)W_(0.5)(B-α-Sb W_9O_(33))_2}](OH)4·7H_2O(1, dien = diethylenetriamine) has been hydrothermally synthesized and structurally characterized by elemental analyses, IR spectroscopy, TG analysis, and single-crystal X-ray diffraction analysis. Crystal data for 1: monoclinic, C2/c, a = 31.527(3), b = 13.9309(13), c = 24.297(2) ?, β = 1108.269(2)o, V = 10133.2(17) ?3, Dc = 4.024 g/cm3 and Z = 4. X-ray crystallographic study shows that the molecular structure of 1contains an infrequent penta-nuclearity {Cu4.5W0.5} cluster sandwiched polyanion [{Cu4.5W0.5(B-α-Sb W9O33)2}]6-, on which three [Cu(dien)(H_2O)]~(2+) complexes decorated as pendants. Interestingly, two [Cu(dien)(H_2O)]2+ pendants linked the two neighboring sandwich-type polyanions via double Cu-μ_2-O-W bridges, resulting in a 1-D chain. The magnetic measurements show compound 1exhibits obvious antiferromagnetic interactions.
A new organic-inorganic hybrid sandwich-type polyoxotungstate [Cu (dien) - (H_2O) _2] _2 [{Cu (dien) (H_2O)} _3 {Cu_ (4.5) W_ (0.5) (B-α-Sb W_9O_ 33)) _2}] (OH) 4 · 7H_2O (1, dien = diethylenetriamine) has been hydrothermally synthesized synthetically characterized by elemental analyzes, TG analysis, and single-crystal X-ray diffraction analysis. : monoclinic, C2 / c, a = 31.527 (3), b = 13.9309 (13), c = 24.297 (2)?, β = 1108.269 (2) o, V = 10133.2 / cm3 and Z = 4. X-ray crystallographic study shows that the molecular structure of 1contains an infrequent penta-nuclearity {Cu4.5W0.5} cluster sandwiched polyanion [{Cu4.5W0.5 (B-α-Sb W9O33) 2 Interestingly, two [Cu (dien) (H_2O)] 2+ pendants linked the two neighboring sandwich-type polyanions via double Cu-μ_2-OW bridges, resulting in a 1-D chain. The magnetic measurements show compound 1 exhibits remarkable antiferromagnetic interactio ns.