**Formation of Fe(III) Ternary Complexes with Related Bio-relevant Ligands**

Wafaa Mahmoud Hosny

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Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/intechopen.69158

#### Abstract

Ternary complexes of iron(III)-glycine( Gly)-nitrilotriacetate (NTA) system determined by electrochemical measurements of the dissolved iron(III)-Gly-NTA mixed ligand system in the 0.1 mol�dm–<sup>3</sup> NaClO4 aqueous solution at pH <sup>¼</sup> 8.0 � 0.1and 25 � <sup>1</sup>�C. The coordination number of Fe in Fe(EDTA)-L is seven in coordinate complex, where L can be a DNA constituent like uracil, uridine, thymine, thymidine, and inosine. The nonlinear least-squares program MINIQUAD-75 is used to deduce the hydrolysis constants of [Fe(EDTA)(H2O)]� and its formation constant in solution. The antimicrobial activity of Fe(III) complexes of salicylhydroxamic acid (SHAM) and 1,10-phenanthroline (PHEN) studied against representative pathogenic bacteria and fungi.

Keywords: iron(III), MINIQUAD-75, speciation, stability constant, glycine, sulfamethoxazole, salicylhydroxamic acid
