Sonochemical synthesis and crystal structure of di­methyl­ammonium bis­3-carb­oxy-2-(di­methyl­amino)­propano­ato-κ2NO1chlorido­chromium(II) monohydrate

摘要

The title complex, [(CH3)2NH2][Cr(C6H10NO4)2Cl]·H2O, was synthesized sonochemically. The complex anion consists of a chromium(II) ion ligated by two 3-carb­oxy-2-(di­methyl­amino)­propano­ate anions. They coordinate in a bidentate manner, with a carboxyl­ate oxygen atom and the nitro­gen atom cis to each other in the equatorial plane, while the apical position is occupied by a Cl⁻ ion. Hence, the chromium(II) ion is five-coordinate with a quasi-ideal square-pyramidal geometry; τ5 parameter = 0.01. The complex crystallizes as a monohydrate and in the crystal, the water mol­ecule and the di­methyl­ammonium counter-ion link the complex cations via N—H⋯O, N—H⋯Cl, Owater—H⋯O, O—H⋯Owater and O—H⋯O hydrogen bonds, forming a supra­molecular framework. There are also a number of C—H⋯O hydrogen bonds present that reinforce the framework structure. The crystal studied was refined as a racemic twin.