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(mu-med)](2) with pyridine (py) or triphenylphosphine (PPh3) in the presence of AgBF4 produced the following complexes: [Pd(CH3COO)(mu-med)](2), [Pd(mu-med)(py)](2)(BF4)(2) and [Pd(mu-med)(PPh3)](2)(BF4)(2). Similar reactions carried out with 2,2'-bipyridine (bpy) or 1,3-bis(diphenylphosphino)propane (dppp) produced [Pd(mu-med)(bpy)](x)(BF4)(x) (x = 1 or 2) and [Pd(mu-med)(dppp)](x)(BF4)(x) (x = 1 or 2). Treatment of [Pd(mu-med)(bpy)](x)(BF4)(x) with [PdCl2(CH3CN)(2)] produced [Pd3Cl2(mu-med)(2)(bpy)(2)](BF4)(2). Treatment of [Pd (mu-med)(dppp)](x)(BF4)(x) with [PdCl2(CH3CN)(2)] produced a mixture of [Pd(mu-Cl)(dppp)](2)(BF4)(2) and [Pd(mu-med)(2)(dppp)](2+). X-ray crystal structures of [Pd(mu-med)(PPh3)](2)(BF4)(2) . 2CH(3)CN and [Pd(mu-med)(bpy)](2)(BF4)(2) . 0.5CH(3)OH are presented. (C) 2003 Elsevier B.V. All rights reserved.