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The DMSO Solvated octahedro ‐[W 6 Cl i 12 ]Cl 6 a Cluster Molecule
Author(s) -
Zheng YueQing,
Jonas Ekaterina,
Nuss Jürgen,
Schnering Hans Georg von
Publication year - 1998
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/(sici)1521-3749(199809)624:9<1400::aid-zaac1400>3.0.co;2-0
Subject(s) - chemistry , crystallography , molecule , crystal structure , tetragonal crystal system , dimethyl sulfoxide , stereochemistry , organic chemistry
Abstract Octahedro ‐hexatungsten octadecachloride, W 6 Cl 18 , is soluble in dimethyl sulfoxide (DMSO). Brownish black crystals of W 6 Cl 18 (DMSO) 4 are formed from the brown solution by evaporation of DMSO under dynamic vacuum. The compound crystallizes monoclinically in the space group P 2 1 / n (no. 14) with a = 10.420 Å, b = 9.271 Å, c = 20.828 Å, β = 91.10° and Z = 2. The crystal structure is formed by isolated cluster molecules [W 6 Cl i 12 ]Cl 6 aof the hexameric tungsten trichloride and DMSO molecules. It is the first hierarchical variant of the tetragonal BaAl 4 type of structure where all atoms of the intermetallic phase are substituted by neutral molecules. The mean bond lengths are d(W–W) = 2.878 Å, d(W–Cl i ) = 2.391 Å and d(W–Cl a ) = 2.447 Å. They will be discussed in relation to analogous clusters. The two crystallographically independent DMSO molecules (d(S–O) = 1.53–1.55 Å, d(S–C) = 1.65–1.78 Å) form a 3 D net of condensed < 4 8 6 4 > dodecahedra which envelopes the clusters.