This investigation involved the synthesis and Electrical characterization of Crystals of p-dimethylaminobenzaldehyde and o-phenylenediamine Ligand with Cu(II), Fe(III) and Ni(II) metal. An electrical conductivity of all crystals was measure at different temperature. Crystals were combined and form a tabulate of 6 mm diameter. It was heated at a 1oC / min. From the conductivity of crystals resistivity was also carried out and hence Specific resistivity was also carried out from the size of tabulate. Activati