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Abstract
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Metal carbene complexes are of much interest in synthetic chemistry [1]. One of the most abundant carbene complexes are Cα coordinated M(NO3)n complexes, [((Me)2SCHC(O)C6H4-m-OMe)2.Hg(NO3)2]. Sulfur ylides R2S = C (R′) (R″) (R, R′, R″ = alkyl or aryl groups) are very reactive species with interesting applications in organic synthesis [2]. These compounds can behave as ambidentate ligands, because the carbanion located at the Cα of the ylide or the enolate oxygen is able to donate electron density to a transition metal [3].Considering the importance of metal carbenes, and particularly sulfoniumylide, synthetically simple and general routes for their preparation are highly desirable. Herein, we report the synthesis and characterization of new polymeric complexes of Hg(II) and Cd(II) derived from α-keto stabilized sulfoniumylide.Reaction of α-keto stabilized sulfoniumylides (Me)2SCHC(O)C6H4R (R= m-OMe) with Hg(NO3)2 and Cd(NO3)2 in 1:1 ratios leads to polymeric products of the type [M(NO3)2.(ylide)]. Also, mononuclear and polymeric products of the type [(ylide)M(NO3)2]n obtained by the reaction of mentioned ylide and reported the synthesis of a series of transition metal complexes with various sulfoniumylides without further characterization. Characterization of the complexes by IR, 1H and 13C NMR spectroscopy confirmed coordination of the ylide to the metal through the carbon atom.
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