W0253

(Propylammonium)₄Ni₃Cl₁₀. Marcus R. Bond, Allison Gerdes, and Annette F. Kelley, Dept. of Chemistry, Southeast Missouri State Univ., Cape Girardeau, MO 63701.

The title compound crystallizes with the Cs₄Mg₃F₁₀ structure type, consisting of zig-zag inorganic layers separated by propylammonium cations; it represents a rare example of not only a Cs₄Mg ₃F₁₀ structure with a large anion, but also a rare layered organic/inorganic Ni(II) halide. The inorganic layers consist of trimetallic Ni₃Cl₁₂ units made up of face-sharing NiCl₆ octahedra with corner sharing of terminal chlorides to two neighboring trimetallic units on either end. The propylammonium cations hydrogen bond to chlorides in the inorganic layers to generate an organic bilayer arrangement reminiscent of that in organoammonium layer perovskite (A₂MX₄) structures. The title compound crystallizes in orthorhombic Cmca with unit cell constants a = 6.9137(1) Å, b = 23.9657(3) Å, c = 17.3547(2) Å, V = 2875.53(6) ų, Z = 4 at 100 K. 55224 X-ray intensity data were measured to θ = 35° on a Nonius KappaCCD diffractometer. Least-squares refinement of 94 parameters on F² against 2700 unique, observed reflections yielded R = 0.028 and wR = 0.054. We thank the NSF-CCLI program (grant #9951348) for funding to establish the X-ray diffraction facility at Southeast Missouri State University.