Darstellung und Struktur von Cs₂As₈S₁₃ / Preparation and Structure of Cs₂As₈S₁₃

Abstract

<jats:title>Abstract</jats:title><jats:p> The thioarsenate(III) Cs<jats:sub>2</jats:sub>As<jats:sub>8</jats:sub>S<jats:sub>13</jats:sub> has been prepared by the reaction of Cs<jats:sub>2</jats:sub>CO<jats:sub>3</jats:sub> with As<jats:sub>2</jats:sub>S<jats:sub>3</jats:sub> in aqueous solution under pressure at 180 °C. Its structure has been established by X-ray structural analysis. The polymeric anion (As<jats:sub>8</jats:sub>S<jats:sub>13</jats:sub><jats:sup>2-</jats:sup>)<jats:sub>n</jats:sub> is composed of individual As<jats:sub>4</jats:sub>S<jats:sub>4</jats:sub> -rings, which are each connected to three further eight-membered rings via As-S-As bridges, so giving rise to an infinite layer structure.</jats:p>

Syntheses, structures and properties of three selenoarsenates templated by transition metal complexes

“…Each As 3+ is coordinated by one terminal and two bridging Se 2À anions. The As-Se bond distances vary from 2.2919(7) to 2.4357(8) Å and the Se-As-Se bond angles range from 95.07(2)°to 104.58(2)°, which are comparable with those found in the only known complex [Sr(en) 4 ] n AE n[Sr(en) 4 ] AE n(As 3 Se 6 3À ) AE nCl À [6]. The As atoms of the [As 2 Se 6 ] 4À anions in 2 and 3 are coordinated by a terminal Se 2À anion and bridged by two Se 2 2À groups to form a chair conformation.…”

“…While little attention has been paid to the possibility of using metal complexes as templates in the synthesis of chalcogenoarsenates [6]. Our work is focussed on introduction tm complexes into the metal chalcogenoarsenate framework and understanding the role of template cations in determining the inorganic framework structures of chalcogenoarsenates.…”

Review. Solvothermal Synthesis and Structure of Chalcogenidoarsenate Anions

“…In contrast to the general size-related structuredirecting role of the counterions in the 1D thioarsenates(III), a specific templating role is adopted by the Cs + cations in the only known lamellar phase, Cs 2 As 8 S 13 [37]. As illustrated in Fig.…”

“…4, the alkali metal cations induce the formation of eight-membered As 4 S 4 rings and are coordinated by each of the four S atoms of the individual rings in the resulting crystal structure. It is interesting to note in this respect that discrete cyclo-[As 4 [37]. nectivity pattern is without parallel for the thioarsenates(III) and will be discussed in more detail below.…”

Pr3S2Cl2[AsS3]: A Praseodymium(III) Sulfide Chloride Thioarsenate(III) with Double Chains of Condensed [SPr4]10+ Tetrahedra

“…Just as the oxoarsenates(III), ternary alkali-metal(I) or alkaline-earth metal(II) thioarsenates(III) also show ψ 1 -tetrahedral anions, here [AsS 3 ] 3-pyramids comprising three S 2-anions and an As 3+ lone-pair cation. For the compositions A 3 [AsS 3 ] (A = Li and Na), [17][18][19] Cs 2 As 8 S 13 , [20] SrAs 2 S 4 , [21] and Ba 2 As 2 S 5 [22] as also shortly AAsS 2 (A = Li and Na) [23][24][25] their application as non-linear optical (NLO) materials [26] stood in the focus of interest. In addition to this, various quaternary thioarsenates(III) in the A-M-As-S systems (A = alkali metal, M = coinage metal), e.g.…”