Synthesis, Spectral Characterization of Mn(II) and Co(II) Complexes with Thiosemicarbazones and Semicarbazones Derived from Pyridine-2-Carboxaldehyde.

Mn(II) and Co(II) complexes are synthesized with L1(Pyridine-2-carboxaldehydethiosemicarbazones) and L2 (Pyridne-2-carboxaldehydesemicarbazones). These complexes were characterized by elemental analysis, molar conductance measurements, magnetic suscepectibility measurements, mass, IR, electronic and EPR spectral studies. The molar conductance measurement of the complexes in DMSO corresponds to non electrolytes nature with L1 and formulated as [M(L)2X2] where M=Mn(II) and Co(II) complexes. The molar conductance measurements with L2 lie in the range 208-217 Ω-1cm2mol-1 indicating the electrolytes nature of the complexes thus the complexes formulated as [M(L)2]X2 where M=Mn(II) and Co(II) complexes. On the basis of spectral studies an octahedral geometry has been assigned for Mn(II) and Co(II) complexes.

Synthesis, Spectral Characterization of Cu (Ii) and Ni (Ii) Complexes with Thiosemicarbazones and Semicarbazones Derived from Pyridine-2-Carboxaldehyde.

Ni (II) and Cu (II) complexes were synthesized with L1(Pyridine-2-carboxaldehydethiosemicarbazones) and L2 (Pyridine-2-carboxaldehydesemicarbazones). These complexes were characterized by elemental analysis, molar conductance measurements, magnetic susceptibility measurements, mass, IR, electronic and EPR spectral studies. The molar conductance measurements on the complexes in DMSO correspond to non electrolytes nature with L1. The molar conductance measurements with L2 lie in the range 210-226 Ω-1cm2mol-1 indicating the complexes were 1:2 electrolyte thus the complexes may be formulated as [M(L)2]X2 where M= Ni (II) and Cu (II) complexes. On the basis of spectral studies an octahedral geometry has been assigned for Ni (II) complexes. A tetragonal geometry suggested for Cu (II) complexes.