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

Abstract

The crystal structure of the title compound, {[AsCl3(C5H5N)]·H2O}n, is characterized by polymeric chains consisting of alternating arsenic and chlorine atoms running parallel to the a axis. O—H⋯Cl and N—H⋯O hydrogen bonds mediated by non-coordinating water mol­ecules assemble these chains into a three-dimensional framework. The AsIII atom, the atoms of the pyridinium ring and the water O atom have m site symmetry and the bridging Cl atom has site symmetry 2. This is the first reported organotrichloro­arsenate(III) in which arsenic adopts a ψ-octa­hedral fivefold coordination.