Spectrophotometric study of some Mn(II) ternary complexes and their analytical applications

Abstract

New ternary complexes of Mn(II) with py, bipy, and terpy as primary ligand (L1) and 2 0 ,4 0 ,5 0 ,7 0 -tet- raiodofluorescein (I4FlCOOH) as secondary ligand (L2) were prepared. The stoichiometry for these complexes was found to be Mn(II):L1:L2 = 1:2:1, and the complex for- mula proposed is (Mn(L1)2(I4FlCOO)) ? . The effect of substituent groups of L2 and the nitrogen atoms of L1 on complex formation with Mn(II) was studied. Moreover, the interference of some cations and anions in the determina- tion of Mn(II) by this method was investigated and the interferences of Cu(II) and Fe(III) with Mn(II) in their corresponding alloys were considered. A simple, rapid, and sensitive spectrophotometric method for determination of Mn(II) in its salts and Mn in its alloys is suggested.