Reactivity of [PdCl(bdtp)](BF4) with monodentate neutral and anionic ligands. Structure of [Pd(bdtp)(PPh3)](BF4)2 (bdtp = 1,5-bis(3,5-dimethyl-1-pyrazolyl)-3-thiapentane)

Complex [PdCl(bdtp)](BF4), in presence of AgBF4 or NaBF4, reacts with pyridine (py), triphenylphosphine (PPh3), cyanide (CN−), thiocyanate (SCN−) or azide (N3−) ligands, leading to the formation of the following complexes: [Pd(bdtp)(py)](BF4)2 [1](BF4)2, [Pd(bdtp)(PPh3)](BF4)2 [2](BF4)2, [Pd(CN)(bdtp)](BF4) [3](BF4), [Pd(SCN)(bdtp)](BF4) [4](BF4) and [Pd(N3)(bdtp)](BF4) [5](BF4). These complexes were characterised by elemental analyses, mass spectrometry, conductivity measurements, infrared and NMR spectroscopies. The crystal structure of [2](BF4)2 was determined by single-crystal X-ray diffraction methods. The metal atom is coordinated by two azine nitrogen atoms, and one sulfur atom of the thioether–pyrazole ligand and one triphenylphosphine in a distorted square–planar geometry.

The reaction of [PdCl(bdtp)] with pyridine, triphenylphosphine, cyanide, thiocyanate or azide produces the complexes [Pd(bdtp)(X)](BF4)2 (X = py, PPh3) or [Pd(bdtp)(X)](BF4) (X = CN−, SCN−, N3−). X-ray crystal structure of complex [Pd(bdtp)(PPh3)](BF4)2 has been determined. The NMR studies of the complexes prove the rigid conformation of the bdtp ligand once it has been complexed.Figure optionsDownload as PowerPoint slide