Synthesis, crystal structure, spectroscopic and thermal properties of [Et{sub 4}N][Ta{sub 6}Br{sub 12}(H{sub 2}O){sub 6}]Br{sub 4}.4H{sub 2}O (Et=ethyl)-A new compound with the paramagnetic [Ta{sub 6}Br{sub 12}]{sup 3+} cluster core
- Ruder Boskovic Institute, Bijenicka cesta 54, 10000 Zagreb (Croatia)
- Institut fuer Mineralogie und Kristallographie, Universitaet Wien-Geozentrum Althanstrasse, 14, 1090 Wien (Austria)
A new hexanuclear cluster compound, [Et{sub 4}N][Ta{sub 6}Br{sub 12}(H{sub 2}O){sub 6}]Br{sub 4}.4H{sub 2}O (Et=ethyl) (1), with the paramagnetic [Ta{sub 6}Br{sub 12}]{sup 3+} cluster entity, was synthesized and characterized by elemental and TG/DTA analyses, IR and UV/Vis spectroscopy and by a single-crystal X-ray diffraction study. The presence of the paramagnetic [Ta{sub 6}Br{sub 12}]{sup 3+} unit was confirmed also by the room-temperature magnetic and EPR measurements. The compound crystallizes in the tetragonal I4{sub 1}/a space group, with a=14.299(5), c=21.241(5) A, Z=4, R{sub 1}(F)/wR{sub 2}(F{sup 2})=0.0296/0.0811. The structure contains discrete [Ta{sub 6}Br{sub 12}(H{sub 2}O){sub 6}]{sup 3+} cations with an octahedron of metal atoms edge-bridged by bromine atoms and with water molecules occupying all six terminal positions. The cluster units are positioned in the vertices of the three-dimensional (pseudo)diamond lattice. The structure shows similarities with literature reported structures of cluster compounds crystallizing in the diamond (Fd3-barm) space group. - Graphical abstract: Two interpenetrating (pseudo)diamond nets formed by packing of the paramagnetic [Ta{sub 6}Br{sub 12}(H{sub 2}O)]{sup 3+} (octahedral) and diamagnetic [Et{sub 4}N]{sup +} (spheres) cations.
- OSTI ID:
- 21370575
- Journal Information:
- Journal of Solid State Chemistry, Vol. 182, Issue 9; Other Information: DOI: 10.1016/j.jssc.2009.06.026; PII: S0022-4596(09)00287-4; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CATIONS
DIAMONDS
DIFFERENTIAL THERMAL ANALYSIS
ELECTRON SPIN RESONANCE
FCC LATTICES
MOLECULAR CLUSTERS
MONOCRYSTALS
NMR SPECTRA
PARAMAGNETISM
SPACE GROUPS
SYNTHESIS
TANTALUM BROMIDES
TEMPERATURE RANGE 0273-0400 K
TETRAGONAL LATTICES
THERMODYNAMIC PROPERTIES
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA
X-RAY DIFFRACTION
BROMIDES
BROMINE COMPOUNDS
CARBON
CHARGED PARTICLES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
CUBIC LATTICES
DIFFRACTION
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
IONS
MAGNETIC RESONANCE
MAGNETISM
MINERALS
NONMETALS
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
RESONANCE
SCATTERING
SPECTRA
SYMMETRY GROUPS
TANTALUM COMPOUNDS
TEMPERATURE RANGE
THERMAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS