Synthesis and characterization of new complexes of some divalent transitional metals with isonicotinamido-4-chlorobenzalaldimine

Abstract

New complexes of N-isonicotinamido-4-chlorobenzalaldimine (INHCBA) with Cu(II), Co(II) and Cd(II), having formula of the type [M(INHCBA)(ac) 2 ]·xH 2 O (M = Cu 2+ , x = 1, M = Co 2+ , x = 2, M = Cd 2+ , x = 0, ac = CH 3 COO -), and with Cu(II), Mn(II) and Zn(II), having formula of the type [M(INHCBA) 2 (H 2 O) 2 ]SO 4 ·xH 2 O (M = Cu 2+ , Mn 2+ , x = 2 and Zn 2+ x = = 2.5) were synthesized and characterized by analytical and physico-chemical techniques, i.e., elemental analyses, IR, UV-Vis-NIR and EPR spectroscopy as well as thermal analysis and the determination of the molar conductivity and magnetic moments. The thermal behaviour of complexes was studied by thermogravimetry (TG), differential thermal analysis (DTA) and differential scanning calorimetry (DSC). The ligand behaves as bidentate NO, being coordinated through the azomethine nitrogen and carbonylic oxygen. The heats of decomposition, ΔH, associated with the exothermal effects, were also determined.

Synthesis, characterization, single crystal XRD, in vitro antimicrobial and cytotoxicity study of tris(ethylenediamine)cobalt(III)chloride oxalate trihydrate

“…The absorption at 400 nm may be assigned to 4 T 1g (F) fi 4 A 2g (F). These are similar to those reported for other six co-ordinated Co(III) complexes (Raman et al, 2009;Howlader and Islam, 2007;Lever and Mantovani, 1971;Lever, 1968;Guoy and Ballhausen, 1963;Ababei et al, 2011).…”

Antimicrobial Activity and Urease Inhibition of Schiff Bases Derived from Isoniazid and Fluorinated Benzaldehydes and of Their Copper(II) Complexes

“…The products were characterized by appropriate analytical methods—elemental analysis, NMR, and infrared spectroscopy. The characteristic infrared (IR) vibrational bands are listed in the Experimental part and are in accordance with the expected values [29]. Infrared spectra of the Schiff bases contain a strong and sharp peak near 1670 cm −1 , characteristic of the valence vibration of the carbonyl group (amide I).…”

Spectral, thermal and magnetic properties of Cu(II) and Ni(II) complexes with Schiff base ligands

“…The magnetic properties of 1 in the form of an χ M vs. T plot (χ M is the molar magnetic susceptibility) is shown in Fig. 29,[33][34][35] The magnetic moment values calculated for 4 are in the range of 1.85-1.88 µ B . The observed effective moment of complexes 1 and 3 (having square-planar geometry 15,17 ) at 76 K is 2.12 µ B , while that at room temperature is 2.20 µ B .…”