Synthesis and Structural Studies of Butylmalonyl-bis(4-phenylsemicarbazide) Complexes
摘要:
New transition metal complexes of Co-II, Ni-II, Cu-II and Fe-III with butylmalonylbis (4-phenylsemicarbazide), H(4)BMPS, have been synthesized chemically and electrochemicaly. Attempts have been made to ascertain their probable structures on the basis of elemental analyses, molar conductivity, spectra (IR, electronic and H-1 NMR) and magnetic measurements. IR data show that H(4)BMPS acts as a bidentate or hexadentate (with two metal ions) ligand coordinating via different modes. The stereochemistry of Co-II, Ni-II, Cu-II and Fe-III complexes was investigated with the help of magnetic and spectral studies. The crystal field parameters calculated for the Co-II and Ni-II complexes agree fairly well with that reported for known octahedral complexes. [Co-2(BMPS)(H2O)(4)] has a trigonal bipyramidal structure while [Ni-2(BMPS)(H2O)(4)] has mixed stereochemistry.