Zeitschrift fur Anorganische und Allgemeine Chemie p. 251 - 253 (1996)
Update date:2022-08-29
Topics:
Schulz Lang
Abram
Stra?hle
Re4(μ3-Te)4(TeBr2) 4Br8 is obtained from the elements at 550°C in an evacuated glass ampoule. The diamagnetic compound forms air-stable, metallic lustre black crystals crystallizing in the tetragonal space group 14 with a = 1120.2(2), c = 1393.5(3) pm, and Z = 2. The crystal structure is built up by isolated cluster molecules Re4(μ3-Te)4(TeBr2) 4Br8 occupying the centres 4 at 1/2, 1/2, 0 and 0, 0, 1/2. The inner sceleton is formed by a Re4Te4 heterocubane unit with short Re-Re distances of 277 and 283 pm, which can be discussed as single bonds. Each Re atom coordinates in addition two Br- ligands and one TeBr2 molecule. For Re therefore results the oxidation state +IV. Reaction of Re4(μ3-Te)4(TeBr2) 4Br8 with I2 yields (TeI4)4. ? Johann Ambrosius Barth 1996.
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