| | 1 | Author
| Manfredo Hörner, Wolfgang Hiller, Joachim Strähle, GeorgeM. Sheldrick | Requires cookie* | | | Title
| Synthese, Eigenschaften und Kristallstruktur von (NH 4 )NbOBr 4 Synthesis, Properties and Crystal Structure of (NH 4 )NbOBr 4  | | | | Abstract
| (NH 4)NbOBr 4 is obtained as air sensitive, light red crystals from NH 4 Br and NbBr 5 in a sealed glass ampoule at 420 °C, whereby the oxygen presumably originates from the glass surface. The compound crystallizes in the monoclinic space group C2/m with a — 1269.9(1), b = 1384.7(2). c = 773.0(2) pm, ß = 114.44(2)° and Z = 6. The structure is built up by NH 4 + cations and polymeric NbOBr 4 anions. Symmetrical linear oxo bridges with Nb-O = 199 pm connect square planar NbBr 4 units to form endless chains arranged in planes parallel (010). Neighbouring NbBr 4 units are in eclipsed as well as staggered orientations. The NH 4 + cations are located between the planes of parallel NbOBr 4 " chains. The vibrational frequencies of the IR and Raman spectrum are assigned. | | | |
Reference
| Z. Naturforsch. 43b, 981—984 (1988); eingegangen am 25. März 1988 | | | |
Published
| 1988 | | | |
Keywords
| Ammonium Tetrabromooxoniobate(V), Synthesis, Crystal Structure, Raman Spectra, IR Spectra | | | |
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| default:Reihe_B/43/ZNB-1988-43b-0981.pdf | | | | Identifier
| ZNB-1988-43b-0981 | | | | Volume
| 43 | |
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