Palladium(II) complexes of N2O2 and N2S2 ligands: Syntheses and X-ray crystal structures

Palladium(II) complexes of an imine-thiophene ligand N,N' bis(1-methylenethiophene)-1,3-diaminopropane and an amine-phenol ligand N,N'-bis(2-hydroxybenzyl)1,3-diamino-2,2-dimethylpropane were synthesized by reacting K₂PdCl₄ with alcoholic solutions of the ligands. X-ray structures of the complexes were determined using data from a CAD-4 Nonius diffractometer (MoKa radiation). The structures were solved by conventional methods resulting inR factors of 0.044 and 0.061 using 1841 and 2241 independent reflections, respectively. Crystal data: Complex I, orthorhombic, space groupPbca,a=11.323(2),b=14.819(2),c=23.873(3)Å,V=4006(1)ų,Z=8. Complex II: Space groupP2₁/c,a=9.169(2),b=31.920(4),c=8.902(6),ß=90.38(2)°,V=2605(1)ų.Z=4. Both complexes showed coordination of the ligands through the nitrogens only while the sulphur and the oxygen atoms were uncoordinated. Square planar coordination is completed bycis chloro ligands.