Abstract
Cationic iron(III) Schiff-base aquo complex of the type [FeL(H2O)2]NO3 (L = C12H18N2O2) was accessed from the interaction of Fe(NO3)3 ⋅ 9H2O with the [N2O2] donor Schiff base. Reaction of the aquated complex with bifluoride , thiocyanate (SCN−), or azide
in 1 : 2 molar ratio in methanolic medium led to the synthesis of anionic mixed-ligand complexes, [FeLX2]
n
− (L = C12H18N2O2, X = F, NCS, N3). The tetradentate Schiff-base ligand was prepared from the condensation of acetylacetone and ethylenediamine following literature method and characterized by spectroscopic and single crystal X-ray diffraction technique. The complexes were characterized using elemental analysis, FT-IR, UV-Vis, mass spectroscopy, and solution electrical conductivity studies. The magnetic susceptibility measurements suggested high-spin Fe(III). The electronic structures of the compounds were analyzed by DFT method using B3LYP/6-31G(d,p) functional and overall, very good agreement between theoretical expectations and experimental data was achieved. The electrochemical behavior of the complexes was examined by cyclic voltammetric method.
Acknowledgments
The authors express sincere thanks to SAIF, NEHU, Shillong and SAIF, CDRI, Lucknow, India for providing analytical and spectral results.