Ligating properties of model bioheterocyclics. Part IV. synthesis and characterization of palladium(II), platinum(II) and platinum(IV) halide complexes with 3,8-Diphenyl-4,5,6,9-tetrahydro1,4,7-thiadiazonines

Summary Palladium(II) halides form five-coordinate PdC₂,(TDAN) complexes with 1,4,7-thiadiazonines (TDAN), whereas platinum(II) chloride yields five coordinate PtC₂,(TDAN)] · n H₂O complexes in the solid state and four-coordinate square planar PtCl(TDAN)]CI · n H₂O complexes in DMF solution. Platinum(IV) chloride reacts with TDAN to form six-coordinate PtCl₃(TDAN)]CI · n H₂O octahedral complexes. 1.4.7-Thiadiazonine behaves as a tridentate ligand and coordinatesvia all three heteroatoms (S. N and N) forming three mutually adjacent five membered chelate rings with the metal ion.