Abstract
CdZn(NCS)4 (1): studied by means of Precession and Guinier technique. The compound seems to be isomorphous to CdHg(SCN)4 but with exchanged metal positions consisting of tetrahedral Cd(SCN)4 and Zn(NCS)4 groups. (Mr = 410.1, space group I 4̄, Z = 2, a = 1110.89(2) pm, c = 444.36(2) pm, V = 548.37 · 106 pm3, dc = 2.48 g · cm-3.) BaZn(NCS)4-7H2O (2): prepared by reaction of Ba(NCS)2-3H2O with Zn(NCS)2 in H2O . The crystal structure was solved with X-ray methods. (Mr= 561.14, space group I 4̄, Z = 8, a = 1894.7(6) pm, c = 1032.4(3) pm, V = 3706.2 · 106 pm3, λ(AgKa) = 55.83 pm, dc = 2.00 g · cm-3, μ(AgKa) = 18.89 cm-1 , F(000) = 2143.8, T = 298 K, final R = 0.0548 for 1475 independent reflections.) The structure consists of two crystallographic independent Zn(NCS)4 tetrahedra, while the Ba2+ cations are surrounded by 9 oxygen atoms of water molecules and 1 sulfur atom of thiocyanate. The crystal water forms one-dimensional chains, consisting of alternant four- and fivemembered rings.
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