Metal complexes containing Cu+2, Ni+2 and Cd+2 of the ligand including 1-amino-3-(N-benzylamino propane) named M2 - [CdL1](Cl-2), M3 - [CuL2](NO3)(2), M4 - [CuL2](Cl-2) and M5 - [NiL2](Cl-2) were investigated structurally by X-ray diffraction (XRD), electrically by two probe and optically by optical methods. From the XRD data, the unit cells of the samples were found as M2, monoclinic, and M3, M4 and M5, triclinic. Hot probe and thermoelectric power measurements indicated that the complexes M2, M3, M4 and M5 have n-type of electrical conductivity and optical band gaps of the complexes are 1.66, 1.31, 1.25 and 1.29 eV, respectively. (C) 1999 Elsevier Science S,A. All rights reserved.