Synthesis, characterization and crystal structure of square-pyramidal copper(II) complexes with pyridoxylidene aminoguanidine

► Synthesis of pyridoxylidene aminoguanidine hydrogenchloride hydrogennitrate, PLAG·HCl·HNO3. ► Synthesis of two new copper(II) complexes, [Cu(PLAG)py(NO3)]NO3 and [{Cu(PLAG)py}2](NO3)4. ► Spectral, cyclic voltammetric and X-ray characterization.