Publication

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]

2004
Journal Articles

Abstract

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 mol. bicapped by two silver cations (local D3d sym.). Reactions of AgMX6 (M = As, Sb) with selenium in liq. 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 addn. 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. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/7c2c8b02-b01e-4b58-91d0-364ebe439edf

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2004
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/7c2c8b02-b01e-4b58-91d0-364ebe439edf

About this result

Related concepts (32)

Silver

Silver is a chemical element with the symbol Ag (, derived from the Proto-Indo-European h2erǵ 'shiny, white') and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc refining.

X-ray crystallography

X-ray crystallography is the experimental science determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to diffract into many specific directions. By measuring the angles and intensities of these diffracted beams, a crystallographer can produce a three-dimensional picture of the density of electrons within the crystal. From this electron density, the mean positions of the atoms in the crystal can be determined, as well as their chemical bonds, their crystallographic disorder, and various other information.

Crystal structure

In crystallography, crystal structure is a description of the ordered arrangement of atoms, ions, or molecules in a crystalline material. Ordered structures occur from the intrinsic nature of the constituent particles to form symmetric patterns that repeat along the principal directions of three-dimensional space in matter. The smallest group of particles in the material that constitutes this repeating pattern is the unit cell of the structure.

Related publications (8)

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]

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