New refinement of the crystal structure of Zn(NH 3 ) 2 Cl 2 at 100 K.

The crystal structure of [ZnCl(NH)], diamminedi-chlorido-zinc, was re-investigated at low temperature, revealing the positions of the hydrogen atoms and thus a deeper insight into the hydrogen-bonding scheme in the crystal packing. In comparison with previous crystal structure determinations [MacGillavry & Bijvoet (1936 ▸). , 249-255; Yamaguchi & Lindqvist (1981 ▸). , 727-728], an improved precision of the structural parameters was achieved. In the crystal, tetra-hedral [Zn(NH)Cl] units (point-group symmetry 2) are linked through N-H⋯Cl hydrogen bonds into a three-dimensional network.