Complexes of palladium(II) and platinum(II) with phenoxathiin and thianthrene

Abstract

Phenoxathiin interacts not only with Pd^II but also with Pt^II. Thianthrene undergoes closely parallel interactions with these metal ions. For each metal-ligand pair. 1:l and 1:2 complexes, [MCl₂L] and [ML₂]Cl₂ have been identified by the method of continuous variation. The 1:2 complexes have, in addition, been characterized by microanalysis, i.r. and electronic spectra, and conductivity measurements. These complexes are believed to have approximate square-planar structures in which the heterocyclic compounds act as bidentate ligands. In nitro-benzene solutions, it appears that, in the 1:2 complexes, one or both of the chloride ions may be weakly bonded to Pd^II or Pt^II.