85533-96-6Relevant articles and documents
Zintl anions from the extraction of zintl phases with non-amine solvents: Isolation of (Me4N)4Sn9, [K(HMPA)2]4Sn9, and K4SnTe4 and structural characterization of (Bu4N)2Mx (M = Te, x = 5; M = Se, x = 6; M = S, x = 6)
Teller, Raymond G.,Krause, Larry J.,Haushalter, Robert C.
, p. 1809 - 1812 (2008/10/08)
Polyatomic main-group anions like Sn94-, Te52-, Se62-, S62-, and SnTe44- have been isolated without the use of cryptate ligands. The polychalcogenides (Bu4N)2Mx (where M = Te, x = 5; M = Se, x = 6; M = S, x = 6; Bu = n-C4H9) are obtained by the aqueous extraction of binary alkali-metal/main-group alloys in the presence of Bu4NBr. These polychalcogenides are isomorphous and have been structurally characterized by X-ray crystallography. The nonastannide(4-) anion has been isolated both as the tetrakis(tetramethylammonium) compound, [(CH3)4N]4Sn9, and as the HMPA (hexamethylphosphoric triamide) solvate, [K(HMPA)2]4Sn9. Both compounds are somewhat thermally unstable at 25 °C. The compound K4SnTe4 has been isolated by the aqueous extraction of ternary K/Sn/Te alloys.