Crystal growth and refinement of the crystal structure of mercury(II) amide chloride - HgClNH2

Article abstract of DOI:10.1002/1521-3749(200010)626:10<2143::aid-zaac2143>3.0.co;2-z

Single crystals were prepared by recrystallization of HgClNH₂ from aqueous NH₃/NH₄⁺ solution at 160 °C. They were used for a single-crystal X-ray structure redetermination. The previously reported [W. N. Lipscomb, Acta. Crystallogr. 1951, 4, 266.] structural topology determined on basis of X-ray powder diffraction data is now confirmed. However, a higher symmetry is found: Space group type Pmma (instead of Pmrn2), a = 6.709(1) A?, b = 4.351(1) A?, c = 5.154(1) A?, Z = 2. The crystal structure contains zig-zag-chains ¹_∞[Hg(NH₂)_2/2]⁺. Four Cl atoms complete the coordination sphere of Hg to a distorted octahedron. These share common faces and edges in layers ²_∞[HgCl_4/4(NH₂) _2/2]. These layers are connected via hydrogen bonds N-H ? Cl.