Bis- chelates of anti-tubercular isonicolinic hydrazide drug (N,O) have been prepared and Characterised on the basis of various physico - chemical data using Mg(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Pb (II) ions. The most convincing structural evidence for these chelates is their electronic and infrared spectra. The ligand field parameters in electronic spectra and metal-ligand vibrations in far-ir are assigned.