eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences August 2009 21 2 403 406 jusps-B 1138 article R.N. Pandey 1 Sanjay Kumar Singh 1 A.K. Nag 1 Manoj Ranjan 1 P.G.Centre of Chemistry (MU) College of Commerce, Patna - 800020 (INDIA) <p style="text-align: justify;">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.</p> <p>&nbsp;</p> https://ultraphysicalsciences.org/paper/1138/ Metal(II) chelates isonicotinic acid hydrazide structural investigation Ligand-field parameters.