THE METASTABLE PARTIALLY POSITIVELY CHARGED Se6 MOLECULE: PREPARATION, CHARACTERISATION AND X-RAY CRYSTAL STRUCTURE OF [Ag2(Se6)(SO2)2][Sb(OTeF5)6]2, [Ag2Se6][AsF6]2 AND [AgSe6][Ag2(SbF6)3]

Autor:	Eric Rivard, Jack Passmore, Andreas Decken, Damian R. Aris, Johannes Beck, Ingo Krossing, Xinping Wang, Isabelle Dionne, Folker Steden
Rok vydání:	2004
Předmět:	Inorganic Chemistry Crystallography Hexagonal crystal system Chemistry Metastability Organic Chemistry Cationic polymerization X-ray Molecule Crystal structure Biochemistry Ion
Zdroj:	Phosphorus, Sulfur, and Silicon and the Related Elements. 179:859-863
ISSN:	1563-5325 1042-6507
DOI:	10.1080/10426500490427367
Popis:	Reactions designed to give Se6[Sb(OTeF5)6]2 by the reaction of Se2Br2, 4Se, and 2Ag[Sb(OTeF5)6] lead to products that include [Ag2(Se6)(SO2)2][Sb(OTeF5)6]2(1). The distorted cubic (Ag2Se6 2+) n consists of a Se6 molecule bicapped by two silver cations (local D3d sym.). Reactions of AgMX6 (M = As, Sb) with selenium in liquid SO2 yielded crystals of [Ag2Se6][AsF6]2 (2) and [AgSe6][Ag2(SbF6)3] (3). Both salts contain stacked arrays of [AgSe6]+ half-sandwich cationic units. [Ag2Se6][AsF6]2 in addition contains stronger, linear Se─Ag─Se horizontal linkages between the vertically stacked cationic columns. [AgSe6][Ag2(SbF6)3] features a remarkable three-dimensional [Ag2(SbF6)3]− anion held together by strong Sb─F···Ag contacts between component Ag+ and SbF6 − ions. Hexagonal channels through this honeycomb-like anion are filled by the stacked [AgSe6 +]x.
Databáze:	OpenAIRE
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