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W 2 Cl 7 (CCl), a Polymeric Tungsten Chlorocarbyne Complex
Author(s) -
Beck Johannes,
Wolf Frank
Publication year - 2002
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 - 10.1002/1521-3749(200207)628:7<1453::aid-zaac1453>3.0.co;2-b
Subject(s) - orthorhombic crystal system , crystallography , octahedron , crystal structure , atom (system on chip) , chemistry , tungsten , ligand (biochemistry) , bond length , biochemistry , receptor , organic chemistry , computer science , embedded system
Black crystals of W 2 Cl 7 (CCl) were obtained from the reaction of WCl 6 and As in CCl 4 at 250 °C under solvothermal conditions. The crystal structure (orthorhombic, space group Pbca , a = 1196(1), b = 1215.6(7), c = 1584(1) pm, Z = 8) is built of infinite zig‐zag chains of dinuclear complexes connected via bridging Cl atoms. The individual complexes are face‐sharing double octahedra concatenated via bridging Cl ligands. Each W atom is in a distorted octahedral coordination environment of five Cl atoms an the carbon atom of the μ 2 bridging chloromethylidyne ligand leading to the formula [{Cl 2 W( μ ‐CCl)( μ 2 ‐Cl) 2 WCl 2 }( μ ‐Cl)] n . The short W‐W distance of 256 pm indicates a multiple W‐W bond, the W‐C bonds of 195 pm are in the typical range for μ 2 ‐alkylidyne ligands, the C‐Cl bond of 167 pm is consistent with a sp 1 hybridisation on the carbon atom.