Dichlorophosphate von Niob, Tantal, Zirkonium und Hafnium; die Kristallstruktur von NbOCl3 · POCl3
Abstract
The reaction of Dichlormonoxide with the metal chlorides NbCl5, TaCl5, ZrCl4 and HfCl4, respectively, solved in POCl3 leads to the compounds I—VII. According to their vibrational spectra (IR, Raman) the structures are assumed.
[NbOCl3 · POCl3]4 crystallizes in the monoclinic space group P21/c with four tetrameric units per unit cell. The crystal structure was solved by x-ray diffraction methods (R = 5.9%, 2386 observed reflections). The structure consists of almost planar and square Nb4O4-eight membered-rings with alternately changing Nb—O bond lengths. The distorted octahedral environment of the Niobium atoms is completed by three terminal Cl-ligands and by the oxygen atom of a POCl3 solvate molecule.
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Articles in the same Issue
- An application of the Patterson method to the determination of the structures composed of two kinds of layers with approximately equal thickness
- Madelung energies and cation distributions in olivine-type structures
- Refinement of the crystal structure of diphenylacetylene
- Crystal-structure determination of euphenyl chloroacetate
- Die Kristall- und Molekülstruktur von 1,3,7,8,8a,9-Hexachlor-4a,5,6,8a-tetrahydro-1,3epidioxy-4,6-methanoisochroman
- Thermal expansion from 25° to 500°C of a few ionic radii
- Lattice parameters and space group of bis-2-bromo-5methoxy-benzylidine-succinic acid (C20H16O6Br2)
- Dichlorophosphate von Niob, Tantal, Zirkonium und Hafnium; die Kristallstruktur von NbOCl3 · POCl3
- Limiting forms and comprehensive complexes for crystallographic point groups, rod groups and layer groups
- Verbotene Reflexe im Röntgenbeugungsbild von Boratran, B(OC2H4)3N
- The scaling of X-ray intensity data: on the calculation of |E| values
- The crystal structure of emeleusite, a novel example of sechser-doppelkette
- Verfeinerung der Kristallstruktur des Natriumperchlorats NaClO4
- Preparation and X-ray analysis of trimethylsulfonium sulfate [(CH3)3S+]2SO2−4
- Jahresversammlung der Schweizerischen Gesellschaft für Kristallographie