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Synthesis and characterization of the bimetallic polymers [MS 4Ag2(Hmimt)2]n (where M = Mo or W, Hmimt = 1-methylimidazoline-2(3H)-thione): Crystal structures of [WS 4Ag2(Hmimt)2]n and [Ag 2I2(Hmimt)]n

Lookup NU author(s): Emeritus Professor Bill Clegg, Dr Neil Brooks

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Abstract

The title compounds were synthesized by the reactions of [NH 4]2[MS4] (M = Mo, W), AgI and Hmimt in acetone and characterized by IR, 1H NMR and UV-Vis spectroscopy. The polymeric structure of [WS4Ag2(Hmimt)2] n was determined by X-ray crystallography. In this compound, there are two distinctly different coordination modes for the silver atoms. One Ag atom has a pseudo-tetrahedral geometry with one terminal monodentate-S Hmimt, two μ2-S bridging Hmimt and one S atom of a monodentate WS 4 unit. The other is surrounded by four sulfur atoms belonging in pairs to two WS4 fragments; the coordination geometry is distorted tetrahedral. The [WS4Ag2(Hmimt)2]n polymer represents the first example of tetrathiometalate anions [MS 4]2- (M = Mo, W, or V) coordinated to another metal atom in a monodentate fashion. In both crystal structures determined the Hmimt ligands are present in the thione form, with coordination taking place via the sulfur atom only. © 2004 Elsevier Ltd. All rights reserved.


Publication metadata

Author(s): Beheshti A, Clegg W, Brooks NR, Sharafi F

Publication type: Article

Publication status: Published

Journal: Polyhedron

Year: 2005

Volume: 24

Issue: 3

Pages: 435-441

ISSN (print): 0277-5387

ISSN (electronic): 1873-3719

Publisher: Pergamon

URL: http://dx.doi.org/10.1016/j.poly.2004.12.002

DOI: 10.1016/j.poly.2004.12.002


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