Synthesis, Spectroscopic and Antimicrobial Studies of Co(II), Cu(II) and Ni(II) Complexes of Schiff Base Derived from Citral and L-Histidine

M. Bencela* and S. Sudha Kumari

Department of Chemistry & Research Centre, South Travancore Hindu College (Affiliated to Manonmaniam Sundaranar University, Tirunelveli), Nagercoil-629002, India

*Corresponding author: E-mail:


A new series of [M(L)Y]X·nH2O (M = Co(II) and Cu(II), where Y = H2O, X= NO3, n = 3), M = Ni(II), where Y = H2O, X = NO3, n = 2) complexes with new Schiff base ligand (L) were synthesized by the condensation of citral and L-histidine. The ligand and its M(II) complexes were characterized based on elemental analysis, spectroscopic studies like FT-IR, electronic, 1H NMR, 13C NMR, ESR data, also accompanied with thermal studies, magnetic susceptibility and molar conductance measurements. In the light of these results, distorted square planar geometry were proposed for the M(II) complexes in which the M(II) centres are present in NNO coordination sphere. To evaluate the biological properties of the Schiff base ligand (L) and its metal complexes, they were screened for their antibacterial and antifungal activities and the results indicate that the complexes exhibit the significant activity.


Citral, L-Histidine, Schiff base, Metal complexes, Antimicrobial activity.

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