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E-Journal of Chemistry
Volume 8 (2011), S1, Pages S323-S329
http://dx.doi.org/10.1155/2011/438174

Synthesis and Structural Characterization of ‘Non-VSEPR’ Structures of Oxo-Tungsten Complex

Shahriare Ghammamy1,2 and Hajar Sahebalzamani1,2

1Department of Chemistry, Islamic Azad University, Malard Branch, Tehran, Iran
2Departments of Chemistry, Faculty of Science, Islamic Azad University, Ardabil Branch, Ardabil, Iran

Received 18 December 2010; Accepted 28 February 2011

Copyright © 2011 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The crystal structure of [(CH3)4N]4 [WOCl4F][WO3Cl4] was determined by single crystal x-ray diffraction technique. The crystal is monoclinic, space group C 2/m, with a= 28.23(10) Å, b= 11.60(4) Å,c= 13.48(5) Å, β=118.43(7)°, V= 3886(2)Å3, Z=4. The structure was solved by direct methods and refined by least-squares methods to a final R = 0.0512 for 3825 observed reflections with I>2σ(I). In crystal there are two crystallographic distinct anions, both with cis geometry; the O-W-F and O-W-O angles are 97.5(3)° and 103.1(3) ° respectively. All structures are cis configurations that confirm a preference for angles below 90° and 180° between cis and trans σ-donor ligands, respectively.