In:
Zeitschrift für anorganische und allgemeine Chemie, Wiley, Vol. 636, No. 15 ( 2010-12), p. 2602-2606
Abstract:
An innovative soft chemical approach was applied, using ionic liquids as an alternative reaction medium for the synthesis of tellurium polycationic cluster compounds at room temperature. [Mo 2 Te 12 ]I 6 , Te 6 [WOCl 4 ] 2 , and Te 4 [AlCl 4 ] 2 were isolated from the ionic liquid [BMIM]Cl/AlCl 3 ([BMIM] + : 1‐ n ‐butyl‐3‐methylimidazolium) and characterized. Black, cube‐shaped crystals of [Mo 2 Te 12 ]I 6 , which is not accessible by conventional chemical transport reaction, were obtained by reaction of the elements at room temperature in [BMIM]Cl/AlCl 3 . The monoclinic structure ( P 2 1 / n, a = 1138.92(2) pm, b = 1628.13(2) pm, c = 1611.05(2) pm, β = 105.88(1) °) is homeotypic to the triclinic bromide [Mo 2 Te 12 ]Br 6 . In the binulear complex [Mo 2 Te 12 ] 6+ , the molybdenum(III) atoms are η 4 ‐coordinated by terminal Te 4 2+ rings and two bridging η 2 ‐Te 2 2– dumbbells. Despite the short Mo···Mo distance of 297.16(5) pm, coupling of the magnetic moments is not observed. The paramagnetic moment of 3.53 μ B per molybdenum(III) atom corresponds to an electron count of seventeen. Black crystals of monoclinic Te 6 [WOCl 4 ] 2 are obtained by the oxidation of tellurium with WOCl 4 in [BMIM]Cl/AlCl 3 . Tellurium and tellurium(IV) synproportionate in the ionic liquid at room temperature yielding violet crystals of orthorhombic Te 4 [AlCl 4 ] 2 .
Type of Medium:
Online Resource
ISSN:
0044-2313
,
1521-3749
DOI:
10.1002/zaac.v636.15
DOI:
10.1002/zaac.201000242
Language:
English
Publisher:
Wiley
Publication Date:
2010
detail.hit.zdb_id:
201094-X
detail.hit.zdb_id:
1481139-X
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