Reactivity of [PdCl(μ-med)]2 with monodentate anionic ligands. Structure of dinuclear complexes [Pd(X)(μ-med)]2 (X = SCN−, N3-). [Hmed = N-2-mercaptoethyl)-3,5-dimethylpyrazole]

The reaction of the complex [PdCl(μ-med)]2 (Hmed = N-(2-mercaptoethyl)-3,5-dimethylpyrazole) with NaCN, NaSCN or NaN3 in presence of AgBF4, yielded complexes with formula [Pd(X)(μ-med)]2 (X = CN− (1), SCN− (2) or N3- (3)). These complexes have been characterised by elemental analyses, conductivity measurements, IR and NMR spectroscopies. X-ray crystal structures of [Pd(SCN)(μ-med)]2 · 0.5CH3CN and [Pd(N3)(μ-med)]2, are presented. These complexes consist of thiolate-bridged dinuclear units. Each Pd(II) is coordinated by a pyrazole nitrogen, two bridging sulfur atoms and one SCN− (2) or N3- (3) anion.

When the complex [PdCl(μ-med)]2 reacts with NaCN, NaSCN or NaN3 and AgBF4, complexes with formula [Pd(X)(μ-med)]2 (X = CN−, SCN− or N3- (3)) were obtained. 1H NMR spectroscopic studies of three complexes prove the rigid conformation of the ligands when they are complexed to the metal. X-ray crystal structures of [Pd(SCN)(μ-med)]2 · 0.5CH3CN and [Pd(N3)(μ-med)]2 are also presented.Figure optionsDownload as PowerPoint slide