Synthesis and characterization of the complexes of 5-amino-4-cyanopyrazole with Cr(II), Mn(II), Zn(II), Cd(II) and Hg(II)

Abstract

The ligand 5-amino-4-cyanopyrazole H4CN5NH₂pz(L) reacts with anhydrous MCl₂ yielding complexes of the type ML₄Cl₂ (M = Cr, Mn, Zn, Cd, Hg).The complexes can also be prepared by the reaction of the ligand with [M(PPh₃)₂Cl₂ (M=Mn, Zn, Cd, Hg). The complexes have been characterized by elemental analyses molecular weight data, conductance measurements, magnetic susceptibility measurements, reflectance and electronic and IR spectral studies. The results are consistent with the octahedral geometry around the metal ions.