Synthesis and spectral studies of Pd(II) complexes with 2,3-disubstituted quinazolin-(3H)-4-ones

Abstract

A number of palladium (II) complexes of bidentate O- O and O - N donors, 2,3-disubstituted quinazoline(3H)-4-ones, have been synthesized and characterized based on analytical, conductivity, magnetic, thermal, IR, electronic and PMR spectraldata. The complexes of Pd(lI) with Iigands such as 2-(R)-3-(X)-substituted quinazoline-(3H)-4-ones, where R = methyl/phenyl and X = 2'-hydroxybenzalimino (MHBQ/PHBQ), carboxymethyl (MCMQ/PCMQ)<i>, </i> furfuralimino (MFQ/PFQ), acetamino (MAQ/PAQ), uramino (MUQ/ PUQ) and thiouramino (MTUQ/PTUQ), yielded the complexes of that MHBQ, PHBQ, MCMQ, and PCMQ act the type[Pd(O – N₂]Cl₂ and [Pd(O-O)₂]. The IR and PMR spectral data of the metal complexes indicate as uninegative bidentate ligands whereas MFQ, PFQ, MAQ, PAQ, MUQ, PUQ, MTUQ and PTUQ act as neutral bidentate ligands. The electronic spectral studies of these complexes indicate that they were square-planar geometry.