Synthesis and characterization of iron (ii) and nickel (ii) schiff base complexes

Abstract

The complexes of iron (II) and nickel (II) with schiff base derived from benzoin and 2-amino benzoic acid have been prepared. Solubility, melting point, decomposition temperature, conductance measurement, infrared (IR) and UV-Visible spectrophotometric studies were used in characterizing the compounds. The melting point of the schiff base determined is 120 o C. The decomposition temperatures of iron (II) and nickel (II) complexes are 152 o C and 155 o C, while the molar conductance values are 11.2 and 10.7 ohm-1 cm 2 mol-1 , respectively. The UV-Visible spectrophotometric analysis revealed 1:1 (metal-ligand) stoichiometry for the two complexes.

Synthesis, Characterization and Anticorrosion Studies of New Homobimetallic Co(II), Ni(II), Cu(II), and Zn(II) Schiff Base Complexes

“…Moreover the new band in the far infrared spectra of the complexes in the range 584-615 cm -1 is assigned to the mM-N. Deprotonation of all hydroxyl functions is confirmed by the lack of Oxime N-O-H and shift of mN-O to higher wave number to about 1059-1063 cm -1 but appeared in free ligand at 1030 cm -1 , indicating the participation with the metal ion as -O -. The broadening bands observed in the spectra of complexes in the range 3377-3488 cm -1 considerable support the presence of water molecules in the complexes [24,32,33]. The weak bands appeared in the far IR spectra between 615-660 cm -1 were attributed to mM-O.…”

Synthesis, Spectroscopic Characterization, Antioxidant Properties and Antimicrobial Activity of Transition Metal Complexes from Novel Schiff Base

“…, and C=N at 1598 cm , showing that electrons on the nitrogen of the azomethine group were involved in the formation of the coordinate bond with the central metal atom [17]. The appearance of additional bands at 508-518 cm -1 and 530-550 cm -1 revealed the nature of the metal-ligand relationship, which illustrates (M-N) and (M-O) bonding in the ligand.…”

Rare Earth Complexes: The Search for Quasi-Monochromatic OLEDs

“…Further the band at 1728cm -1 , υ (C=O) ketonic carbonyl and a band at 1628cm -1 due to υ (C=N) azomethine group shifted towards lower values in metal chelates indicating that carbonyl oxygen and azomethine group of isatin residue is the coordinating sites 20,21 . Appearance of a new bands at 3390cm -1 in Ti(IV) 22 , 3355cm -1 in Zr(IV) 23 and 3350cm -1 in Cd(II) complexes 24 suggested presence of coordinated water molecules. The new bands in spectra of Ti(IV), Zr(IV), Cd(II) and Hg(II) metal complexes at 491-635 cm -1 due to υ (M-N) [25][26][27][28] .…”