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

Investigating Silver Coordination to Mixed Chalcogen Ligands

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 3.0).

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MDPI and ACS Style

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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