Synthesis and crystal structures of cis-palladium(II) and cis-platinum(II) complexes containing dipyridyl ligands

Coordinative behavior of the di-(2-pyridyl)hydroxymethane (1) and di-(2-pyridyl)-2-pyridylsulfanylmethane (2) ligands towards Pd(II) and Pt(II) is described. The compounds 3-5 were characterized by IR, mass spectrometry and NMR spectroscopy. Crystal structures of [Pt{(C5H4N)2CH(OH)}Cl2] 3 and [Pd{(C5H4N)2CH(2-C5H4NS)}Cl2] 4 as DMSO solvates displayed the formation of neutral mononuclear complexes. In the complexes 3 and 4 is observed the formation of six-membered chelate rings. The local geometry of the metallic atoms can be described as square planar in the title complexes.