Abstract: The synthesis and characterization of an unique tetradentate Schiff bases were presented in this report namely: 2-(4,5dihydro-1,5-diphynyl-1H-pyrazole-3-yl)phenol (HL1) and 2-(4,5dihydro-5-(4-methoxyphenyl)-1-phynyl-1H-pyrazole-3-yl)phenol (HL2) and their copper complexes. On the basis of elemental analysis, magnetic susceptibility, conductivity, electronic, IR, ESR spectral data and powder X-ray powder diffraction observations indicated that for investigated complexes have been proposed octahedral geometry.