Synthesis and X-ray diffraction studies on some copper(II) complexes of naphthalene analogues of 2'-hydroxychalcones

Some copper(II) complexes of naphthalene analogues of 2'-hydroxychalcones have been synthesised and characterised. The copper(II) complexes have the general formula CuL(2), where L is the deprotonated ligand, the naphthyl chalcone. In the present investigation, the lattice constants of the copper(II) complexes have been determined with the help of X-ray powder diffraction data. They all gave the tetragonal unit cell. On the basis of cell parameters it has been concluded that (i) replacement of a phenyl ring by a naphthyl ring results in decrease of cell parameters, and (ii) ortho substituent tends to increase cell parameters.