Synthesis and Spectroscopic Studies of Co(II), Ni(II) and Cu(II) Complexes of Bidentate Schiff Base having N and Sulphur Containing Donor Site

Abstract

Coordination compounds play a vital role in several fields Schiff base plays a central role in the field of coordination chemistry due to their biocidal activities including anticancer, antifungal, herbicidal and antibacterial. The high reactivity specificity and a number of Schiff bases in industry, medicine & agriculture are used in catalytic reaction and as biological models for understanding biomolecules. Schiff base compounds that are ABSTRACT A series of complexes having the formulae [M(MTQS) z X z ], where M = Co(II), Ni(II) and Cu(II), MTQS = 2-methyl thioquinazoline -4 (3H) semicarbazone, X = Cl -, Br -, I or NO 3 the ligand as well as metal complexes have been characterized by elemental analysis, magnetic susceptibility, molar conductance, electronic spectra and infrared spectra. On the basis of these studies the complexes of Co(II) and Ni(II) are reported to be octahedral geometry whereas Cu(II) complexes are imposed to be distorted octahedral in geometry. The complexes exhibit enhanced antifungal activity as compared to parent ligand.

Synthesis and Characterization of Cobalt(II), Nickel(II) and Copper(II) Complexes with Nitrogen-Oxygen Donor Ligand

“…Keeping the above facts in mind and in continuation of our recent work [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] we now, present the results of our investigations on…”

Synthesis and Characterization of 2-imino-3–(2-Hydroxylphenyl)-1- Thiazolidin-4-one Substituted Ammine Complexes of Cr(III), Co(III), Ni(II) and Cu(II)

“…The electronic spectral data of the complexes are noted in table 3. In the electronic spectra of Cr(III) complex three d-d transition bands observed at 20940 cm -1 , 24400 cm -1 and 28570 cm -1 corresponding 28 to 4 A 2 g → 4 T 2 g (F), 4 A 2 g → 4 T 1 g (F), 4 A 2 g → 4 T 1 g (P) spin-allowed transitions respectively are consistent with octahedral First band at 15450 cm -1 is assigned 27 to 1 A 1 g → 3 T 2 g(G) spin-forbidden transition whereas other two bands at 20964 cm -1 and 22716 cm -1 correspond to 1 A 1 g → 1 T 1 g(G) and 1 A 1 g → 1 T 2 g(G) spin-allowed transitions respectively of octahedral geometry. Fourth band of high energy attributed to charge transfer from ligand to metal.…”