The reactivity of simple bidentate ligands containing pyridine and heterocyclic thione donor groups towards metal ions is virtually unknown even though, separately, the two functionalities have been extensively used in coordination chemistry.  In this regard, we have used the (mercaptoimidazolyl)pyridine ligand mpyMe to prepare complexes of both transition and main group metals, including derivatives of manganese(I), nickel(II), palladium(II), platinum(II), copper(I), silver(I), zinc(II), cadmium(II), mercury(II), indium(III), tin(IV) and bismuth(III).  Similarly, we have developed the coordination chemistry of two related mixed-donor ligands that contain one or two methylene spacers connecting the heterocyclic moieties.  More specifically, this presentation will outline the syntheses of the new N-butyl-substituted (mercaptoimidazolyl)picoline ligand mpicnBu and its group 12 metal complexes (mpicnBu)MX2 (M = Zn, Cd, Hg; X = Cl, Br, I), most of which have been structurally characterized.  A detailed comparison with the structures of the mpicMe analogues will be made in order to assess the effect of the different alkyl substituents on the mercaptoimidazole rings. 

Synthesis and group 12 metal complexes of a new pyridine/thione ligand

247th National Meeting (2014)

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