High-spin complexes of iron(III) with ethylene glycol and 3(2′-hydroxyphenyl)-5-(4′-substituted phenyl) pyrazolines

Abstract

Complexes of iron(III) with ethylene glycol and 3(2′-hydroxyphenyl)-5-(4′-substituted phenyl) pyrazolines, [Fe(OCH₂CH₂O)(C₁₅H₁₂N₂OX)] _m ⋅ nH₂O and [Fe(C₁₅H₁₂N₂OX)₂(OCH₂CH₂OH)] (where OCH₂CH₂O and OCH₂CH₂OH = ethylene glycol moiety; C₁₅H₁₂N₂OX = 3(2′-hydroxyphenyl)-5-(4-X-phenyl)pyrazoline; X = H, CH₃, OCH₃, or Cl; m = 2–3 and n = 2–3) have been synthesized and characterized by elemental analysis (C, H, N, Cl, and Fe), molecular weight measurement, magnetic moment data, thermogravimetric analysis, molar conductance, spectral (UV-Vis, IR, and FAB mass), scanning electron microscopy, and X-ray diffraction studies. Bonding of ethylene glycol and pyrazolines in these complexes and the particle size of iron(III) complexes are discussed. Antibacterial and antifungal potential of free pyrazoline and some iron(III) complexes are also discussed.

Keywords:

• Iron(III)
• Pyrazolinates
• Ethylene glycolate
• Antimicrobial activity
• High-spin complexes

Acknowledgments

The authors are grateful to SAIF, CDRI, Lucknow, India; Punjab University, Chandigarh, India; IIT, Mumbai, India; SIF, IISc, Bangalore, India; APS University, Rewa, India; Inter University Consortium for the Department of Atomic Energy Facilities (DAEF), Indore, India; and USIC, Delhi University, New Delhi, India, for providing the necessary spectral and analytical data.