Zur Strukturchemie der Alkyl- und Arylhalogenoarsenate(III), [Me2As2Cl5]-, [RAsCl3]-, [R2As2Br6]2- (R = Me, Et, Ph) und [Ph2AsX2]- (X = Cl, Br)

Supramolecular architecture of [AsPh2Br2]2[(Br3)−…(Br2)…(Br3)−] obtained by bromination of (AsPh2)2S

“…As-Br separations in the isoelectronic As(III) anion [Ph2AsBr2] -, as expected, are even longer 2.674(1) Å. [25] As-C bond lengths are normal.…”

Tetramethylammonium dichlorodiphenylbismuthate(III)

“…A variety of anions of formula [ECl 2 Ph 2 ] À are known for arsenic (Grewe et al, 1998) and antimony (Sheldrick & Martin, 1992;Hall & Sowerby, 1988;Calderazzo et al, 1991;Stark et al, 1999). For bismuth, the [BiBr 2 Ph 2 ] À (Stark et al, 1999;Clegg et al, 1992) and [BiI 2 Ph 2 ] À (Clegg et al, 1993) ions have been structurally characterized.…”

catena-Poly[[[dichlorido(pyridin-1-ium-3-yl)arsenic(III)]-μ-chlorido] monohydrate]

“…In the course of our work on arylarsonate functionalized metal oxide clusters (see Breen, Clérac et al (2012), and references therein for vanadium oxide clusters, Onet et al (2011) for molybdenum oxide clusters and Zhang et al (2012) for manganese oxide clusters) we prepared the title compound, whose crystal structure had until now not been determined. In general, the structural chemistry of organohaloarsenates(III) has not been the object of intense study, the only relevant peer-reviewed publication known to us being the contribution by Grewe et al (1998), which is summarized below. The homologous organohalobismuthates(III) and organohaloantimonates(III) have been more widely studied.…”

“…In these adducts, arsenic occurs in ψ-trigonal bipyramidal fourfold coordination. Pentacoordinate, ψ-octahedral adducts are only known for the bromo analogues on account of their stronger acidity: organotribromoarsenates(III) form doubly bridged dimers [RBr 2 As(µ-Br 2 )AsBr 2 R] 2-(R = Me, Et, Ph) (Grewe et al, 1998). The homologous organohaloantimonates(III) and organohalobismuthates(III) form a wider variety of structures based mostly on ψ-octahedral REX 4 motifs.…”

“…For the synthesis, see: Binz & von Schickh (1936). For monomeric and oligomeric monoorganohaloarsenates(III) with tetracoordinate arsenic, see: Grewe et al (1998). For homologous monoorganohaloantimonate(III)/-bismuthate(III) structures, see: Althaus et al (1999); Breunig et al (1992Breunig et al ( , 1999Breunig et al ( , 2010; Hall & Sowerby (1988); James et al (1999); Preut et al (1987); Sheldrick & Martin (1992); von Seyerl et al (1986).…”