Synthesis and Characterization of Palladium(II) Complexes with Substituted Dihydrobenzoimidazoquinazoline Derivatives

Abstract

A series of palladium(II) halo complexes of the types
[PdX2L2].nH2O {n = 0, X = Cl, L = L4and L6; X = Br, L = L3,
L4, L5 and L6; n = 2, X = Cl, L = L3and L7, X = Br, L = L1};
Pd2X4L2 {X = Cl, Br, L = L2 and L8} and Pd2X4L3 [X = Cl, L
= L1; X = Br, L = L7] were prepared where L is 6-R-5,6-
dihydrobenzoimidazo quinazoline (R-Diq; where R =
phenyl: L1/furyl: L2/thiophenyl: L3/o- or phydroxyphenyl: L4, L5/o- or p-chlorophenyl: L6,
L7/dimethylaminophenyl: L8and characterized by
elemental analyses, molar conductivity measurements,
TGA, infrared, electronic, NMR and mass spectral
techniques. Based on these studies, monomeric/dimeric
structure with a square planar geometry around the metal
ion was proposed for these complexes. Anti-microbial
activity for some of the synthesized complexes were
investigated.
Keywords: dihydrobenzoimidazoquinazoline, palladium(II),
thermal analysis, mass spectra, biological activity.