The Non-Centrosymmetric Crystal Structure of Molybdenum(VI) Oxide Bromide MoO2Br2

作者：Schustereit Tanja; Schleid Thomas; Hartenbach Ingo^*

来源：Zeitschrift fur Anorganische und Allgemeine Chemie, 2011, 637(9): 1159-1161.

DOI：10.1002/zaac.201100042

• Molybdenum
• Oxygen
• Bromine
• Solid-state structures

Red, transparent single crystals of molybdenum(VI) dioxide dibromide MoO2Br2 emerged as by-product after thermal analyses of reaction mixtures comprising REBr3 (RE = La or Gd) and MoO3. The structure of this highly water sensitive compound can be described in the non-centrosymmetric monoclinic space group Cc with the lattice constants a = 1522.33(15) pm, b = 390.61(4) pm, c = 771.09(8) pm, beta = 104.394(7)degrees and four formula units per unit cell. Crystallographically unique Mo6+ cations are surrounded by four oxide and two bromide anions in the shape of distorted octahedra with the two Br-ligands situated in trans position to each other. These octahedra are interconnected by the four O-2 anions via vertices to form (2)(infinity){MoO(4/2)(v)Brt(2/1)(t)} layers parallel to the bc plane, whereas the bromide anions remain terminal. These sheets are piled along [100] with the Br anions pointing towards the center of square voids of adjacent layers.

• 出版日期2011-7