Reactivity of [PdCl(μ-med)]2 with monodentate or bidentate ligands. Structure of the dinuclear complexes [Pd(μ-med)(PPh3)]2(BF4)2 and [Pd(μ-med)(bpy)]2(BF4)2. [Hmed=N-(2-mercaptoethyl)-3,5-dimethylpyrazole]

Treatment of the ligand N-(2-mercaptoethyl)-3,5-dimethylpyrazole with [Pd(CH3COO)2]3 and reaction of [PdCl(μ-med)]2 with pyridine (py) or triphenylphosphine (PPh3) in the presence of AgBF4 produced the following complexes: [Pd(CH3COO)(μ-med)]2, [Pd(μ-med)(py)]2(BF4)2 and [Pd(μ-med)(PPh3)]2(BF4)2. Similar reactions carried out with 2,2′-bipyridine (bpy) or 1,3-bis(diphenylphosphino)propane (dppp) produced [Pd(μ-med)(bpy)]x(BF4)x (x=1 or 2) and [Pd(μ-med)(dppp)]x(BF4)x (x=1 or 2). Treatment of [Pd(μ-med)(bpy)]x(BF4)x with [PdCl2(CH3CN)2] produced [Pd3Cl2(μ-med)2(bpy)2](BF4)2. Treatment of [Pd(μ-med)(dppp)]x(BF4)x with [PdCl2(CH3CN)2] produced a mixture of [Pd(μ-Cl)(dppp)]2(BF4)2 and [Pd(μ-med)2(dppp)]2+. X-ray crystal structures of [Pd(μ-med)(PPh3)]2(BF4)2 · 2CH3CN and [Pd(μ-med)(bpy)]2(BF4)2 · 0.5CH3OH are presented.