2005 Tungsten I 5700 08- 019 A High-Nuclearity "Celtic-Ring" Isopolyoxotungstate, [H12W36O120]12-, that Captures Trace Potassium Ions. ? Colorless needle-shaped crystals of (Et3NH)9Na2{(H2O)4K[H12W36 O120]}�H2O are synthesized from aqueous solutions of Na2WO4�2O, triethanolamine, KCl, HCl, and Na2S2O4 (pH 2, 4 癈, 1 month, 10% yield). As revealed by single crystal XRD (orthorhombic, space group Pnma, Z = 4), the new cluster anion [H12W36 O120]12- is well defined and encapsulates a K+ ion. The cluster anion is approximately C3v-symmetric with a Celtic ring-like shape. ? (LONG, D.-L.; ABBAS, H.; KOEGERLER, P.; CRONIN*, L.; J. Am. Chem. Soc. 126 (2004) 43, 13880-13881; Dep. Chem., Univ. Glasgow, Glasgow G12 8QQ, UK; Eng.) ? W. Pewestorf
1/--страниц