Synthesis and characterization of Ru(II) complexes with polyfunctional quinazo line-(3H)-4-ones

Abstract

A few Ru(II) complexes of the type Ru (O – N - O)₂ with tridentate O – N - O donors and of the type RuCl₂(O-N)₂ with bidentate O - O and O – N donors have been synthesized and characterized on the basis of analytical, conductivity, thermal, magnetic, IR, electronic and PMR spectral data. The IR and PMR spectral data of the metalcomplexes indicate that the ligands like 2-methyl/phenyl-3- (2'-hydroxybenzalamino) quinazoline-(3H)-4-one (MHBQ/ PHBQ) act as uninegative tridentate, 2-methyl/phenyl- 3-(carboxymethyl) quinazoline-(3H)-4-one (MCMQ/PCMQ) as uninegative bidentate and 2-methyl/phenyl-3-(furfuralamino) quinazoline-(3H)-4-one (MFQ/PFQ), 2-methyl/phenyl-3-(acetamino) quinazoline-(3H)-4-one (MAQ/PAQ), 2-methyl/phenyl 3-(uramino) quinazoline- (3H)-4-one (MUQ/PUQ) and 2-methyl/phenyl-3- thiouramino)quinazoline-(3H)-4-one-(MTUQ/PTUQ) as neutral bidentate ligands.The electronic spectral data of the complexes indicate that the arrangement around Ru(II) is octahedral.