Treaction between the amine, 2-amino-4-phenylthiazole and the aldehydes salicylaldehyde and o-phthalaldehydic acid, respectively in 1:1 molar ratio. The metal-complex derivatives of Fe3+, Co2+, Ni2+, Cu2+, Zn 2+ and La3+ were also prepared for each ligand. The elemental analysis, IR, UV-Visible, 1H NMR and MS spectral analyses served the structure elucidation. The products were γ-irradiated and the post-radiation UV-Visible results were studied. Some radiolysis products were suggested with the assistance, of the obtained MS results. The TGA events described the thermal stability and coordination establishment of the metal derivatives. In association with the UV-Visible data and magnetic behavior of metal- complexes, the octahedral geometry was suggested for most of the investigated products. However, Cu-complexes revealed distorted arrangement. Most of the derivatives exhibited low molar conductance values illustrating the association of amines in the coordination sphere and the non-electrolyte behavior. The antimicrobial activity tests showed significant inhibition against the Gram-positive Bacillus subtilis (NCTC-1040) by the Cu-complexes. Nevertheless, only the Cu-complexes of II displayed similarly against Streptococcus pyogens (ATCC-19615). The Co- complex of II revealed also significant inhibition against the Gram-negative E.coli as well as against the fungus Aspergillus fungatus .