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Circular Dichroism Studies Of Complexation Of Antibiotic (+)- Cephradine With Cr(Iii), Co(Ii) And Ni(Ii) In Methanol: Water (80:20) Solution, Nasir Ahmad, Javed Safder, Christy Munir
Circular Dichroism Studies Of Complexation Of Antibiotic (+)- Cephradine With Cr(Iii), Co(Ii) And Ni(Ii) In Methanol: Water (80:20) Solution, Nasir Ahmad, Javed Safder, Christy Munir
Turkish Journal of Chemistry
Circular dichroism (CD) studies have been utilized to investigate complexation of antibiotic (+)-cephardine with Cr(III), Co(II) and Ni(II) ions in methanol: water (80:20 v/v) solution. The optimum conditions of pH, stoichiometry and time for achieving equilibrium for maximum complexation in these systems are determined. The CD spectra of these complex ions consist of 2-3 Cotton bands between 16,129-25,994 cm^{-1} with differential absorptivity 0.0046-0.428 deg. L mol^{-1} cm^{-1} and bands are assigned to electronic transitions. The formation constants of these complexes in mixed solvent are reported.