Synthesis and crystal structure of bis[3-(ammoniomethyl)pyridinium]-hexachloridocadmate Dihydrate

Abstract

The synthesis and crystal structure of a new bis[3-(ammoniomethyl)pyridinium]hexachloridocadmate dihydrate are discussed based on X-ray crystallographic structure analysis. This compound crystallizes in the triclinic system, with the space group P1̄ and the following parameters: a = 7.7067(12), b = 7.7840(11), c = 9.6014(16)Å, α = 81.517(5), β = 82.723(5), γ = 66.728(6)°, Z = 1 and V = 521.84(14)Å3. The crystal structure was determined and refined to R = 0.017 using 3243 independent reflections. The assymmetric part of the unit cell contains a [3-(ammoniomethyl)pyridinium] dication, one half of a hexachloridocadmate anion and a water molecule. The compound is built up from inorganic layers formed by CdCl64- anions and ammonium groups. The organic entities and the water molecules are located between these layers, and are connected to them via C-H...Cl, N-H...O and O-H...Cl hydrogen bonds. © The Japan Society for Analytical Chemistry.