Synthesis, crystal structure and spectroscopic characterization of silver(I), cadmium(II) complexes with the Schiff base derived from pyridine-2-carboxaldehyde and 4-[(E)-2-phenyldiazenyl] aniline

The bidentate Schiff-base L is synthesized by condensation of pyridine-2-carboxaldehyde with 4-[(E)-2-phenyldiazenyl]aniline. Hydrothermal reaction of L with AgNO3 and Cd(ClO4)(2) (.) 6H(2)O afforded complexes AgLNO3 (1) and [CdL2(H2O) ClO4]ClO4 (2), respectively, which are characterized by elemental analysis and IR spectroscopy. The single crystal X-ray diffraction analyses reveal that both 1 and 2 are mononuclear. In 1, Ag(I) is coordinated by two N atoms from the Schiff-base ligand and one O atom from NO3- group in a distorted trigonal geometry. In 2, the cadmium(II) is coordinated in a distorted octahedral geometry, with an equatorial plane composed of four nitrogen atoms from two bidentate Schiff-base ligands, and the apical position occupied by one O atom from aqua ligand and one O atom from perchlorate.