"Redox Chemistry of FeII and FeIII complexes using carboxylatebased ligands"

Authors

Richa, Reseach scholar
DBAS, SoES, G.D. Goenka University.

Himanshu Arora, Assistant Professor
DBAS, SoES, G.D. Goenka University.

Abstract

Two new complexes [FeII(L1OO)(H2O)2][ClO4]·2H2O (1), and [FeIII(L1OO)Cl3] (2), (L1OO– = 3-[(2-(pyridine-2-yl)-ethyl){2-(pyridine-2-yl)methyl}amino]propionate) have been synthesized and characterized by elemental analysis, IR, and UV/Vis spectroscopy. In 1 distorted octahedral FeN3O3 coordination is satisfied by three nitrogen atoms and an appended carboxylate oxygen atom of the ligand, and the oxygen atoms from water molecule. In 2 distorted octahedral FeN3Cl3 coordination is satisfied by three nitrogen atoms and three chlorine atoms. When examined by cyclic voltammetry (CV), complex 1 undergoes in DMF one quasi-reversible metal-based (FeII/FeIII) oxidation [E1/2 = 0.325 V vs SCE (saturated calomel electrode)]; whereas complex2 undergoes in CH3CN one quasi-reversible metal-based (FeIII/FeII) reduction [E1/2 = ‒0.055 V vs SCE (saturated calomel electrode)].