PALLADIUM(II) COMPLEXES OF BENZALDEHYDE AND 2-HYDROXYBENZALDEHYDE-4-H/PHENYL-S-ETHYL/ALLYLTHIOSEMICARBAZONES

摘要

The thiosemicarbazone derivatives, R1-C6H4-CH=N-N=(C-S-R2)-NH-R3 [R1 = H, OH; R2 = H, Ph; R3 = C2H5, C3H5], were prepared by a modified general method. The Pd(II) complexes of the thiosemicarbazone ligands L~(I-VI) were isolated in the compositions, [Pd(L)Cl2], [Pd(L)Cl] and [Pd(L)2]. The 1 : 1 and 1 : 2 metal complexes have non-ionic character, and the compounds were characterized by analytical data, infrared and proton resonance spectroscopies. The cis-rrans and syn-anti isomers of the thiosemicarbazones were determined by means of ~1H NMR, and were discussed the coordination behaviour of the polydentate thiosemicarbazone ligands towards palladium ion.