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Molecules 2012, 17(11), 13307-13329; doi:10.3390/molecules171113307

Investigating Silver Coordination to Mixed Chalcogen Ligands

, , ,  and *
EaStCHEM School of Chemistry, University of St. Andrews, St Andrews, Fife KY16 9ST, UK
* Author to whom correspondence should be addressed.
Received: 28 September 2012 / Revised: 31 October 2012 / Accepted: 5 November 2012 / Published: 8 November 2012
(This article belongs to the Special Issue Disulfide and Diselenide Chemistry)
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Six silver(I) coordination complexes have been prepared and structurally characterised. Mixed chalcogen-donor acenaphthene ligands L1L3 [Acenap(EPh)(E'Ph)] (Acenap = acenaphthene-5,6-diyl; E/E' = S, Se, Te) were independently treated with silver(I) salts (AgBF4/AgOTf). In order to keep the number of variables to a minimum, all reactions were carried out using a 1:1 ratio of Ag/L and run in dichloromethane. The nature of the donor atoms, the coordinating ability of the respective counter-anion and the type of solvent used in recrystallisation, all affect the structural architecture of the final silver(I) complex, generating monomeric, silver(I) complexes {[AgBF4(L)2] (1 L = L1; 2 L = L2; 3 L = L3), [AgOTf(L)3] (4 L = L1; 5 L = L3), [AgBF4(L)3] (2a L = L1; 3a L = L3)} and a 1D polymeric chain {[AgOTf(L3)]n 6}. The organic acenaphthene ligands L1-L3 adopt a number of ligation modes (bis-monodentate μ22-bridging, quasi-chelating combining monodentate and η6-E(phenyl)-Ag(I) and classical monodentate coordination) with the central silver atom at the centre of a tetrahedral or trigonal planar coordination geometry in each case. The importance of weak interactions in the formation of metal-organic structures is also highlighted by the number of short non-covalent contacts present within each complex.
Keywords: silver(I) complexes; chalcogen-donor; coordination networks; helical chain polymer; acenaphthene ligands silver(I) complexes; chalcogen-donor; coordination networks; helical chain polymer; acenaphthene ligands
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Knight, F.R.; Randall, R.A.M.; Wakefield, L.; Slawin, A.M.Z.; Woollins, J.D. Investigating Silver Coordination to Mixed Chalcogen Ligands. Molecules 2012, 17, 13307-13329.

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