Synthesis and Crystal Structure of Ordered, Orthorhombic α-NbBr5

@article{Hnle1990SynthesisAC,
  title={Synthesis and Crystal Structure of Ordered, Orthorhombic $\alpha$-NbBr5},
  author={W. H{\"o}nle and S. Furuseth and H. Schnering},
  journal={Zeitschrift f{\"u}r Naturforschung B},
  year={1990},
  volume={45},
  pages={952 - 956}
}
Niobium pentabromide, NbBr5, is prepared in the orthorhombic ordered (α)-form from the elements in sealed quartz ampoules (Nb powder, Br2, l) at 973 K. The structure has been determined from single crystal data (a = 1288.8(2), b = 1869.0(3), c = 614.9(1) pm; Pnma (No. 62); Z = 8; R = 0.055). α-NbBr5_ forms dimeric Nb2Br10 molecules with d̄(Nb–Brb) = 271.5 pm, d̄(Nb–Bre) = 240.8 pm and d̄(Nb– Bra) = 246.1 pm. α-NbBr5 is a diamagnetic semiconductor with cgsχmoldia(300 K) = –72 × 10-6 cm3/mol. The… Expand

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