Neodymium(III) bromide is an inorganic salt of bromine and neodymium the formula NdBr3. The anhydrous compound is an off-white to pale green solid at room temperature, with an orthorhombic PuBr3-type crystal structure. The material is hygroscopicDavid R. Lide (Hrsg.): CRC Handbook of Chemistry and Physics. 90. Auflage. (Internet-Version: 2010), CRC Press/Taylor and Francis, Boca Raton, FL, Properties of the Elements and Inorganic Compounds, S. 4-77. and forms a hexahydrate in water (NdBr3· 6H2O), similar to the related neodymium(III) chloride.
Preparation The direct reaction of neodymium with bromine can create neodymium(III) bromide: 2Nd + 3Br2 → 2NdBr3
In the presence of carbon, neodymium(III) oxide reacts with carbon tetrabromide to produce neodymium(III) bromide.Borisov, G. K.; Krasnova, S. G.; Khrenova, R. I. Preparation of anhydrous bromides of some lanthanides. Zhurnal Neorganicheskoi Khimii, 1971. 16(22): 2899-2901.
Structure Neodymium(III) bromide adopts the plutonium(III) bromide crystal structure. The neodymium ions are 8-coordinate and adopt a bicapped trigonal prismatic geometry. The neodymium–bromine bond lengths are 3.07 Å and 3.09 Å.
See also Lanthanide tribromide
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