Metal ion complex formations are among the prominent interactions in nature, and metal complexation is widespread interest. It is studied not only by analytical or inorganic chemists, but by physical and organic chemists, also, by biochemists, pharmacologists, molecular biologists and environmentalists.The purpose of this thesis is studying in depth, the formation of binary and ternary complexes of Cu (II), Co (II), Ni (II), Zn (II), Fe (III), Al (III) and Cr (III) metal ions with some selected aliphatic and aromatic hydroxamic acids and some biologically important amino acids or nucleic acid components, and evaluation of the effect of temperature of the medium on the stability of some binary and ternary systems.