The d¹⁰ Metal Chelates Derived from Schiff Base Ligands Having Silane: Synthesis, Characterization, and Antimicrobial Studies of Cadmium(II) and Zinc(II) Complexes

Synthesis, Spectroscopic Characterization, Thermal Investigation and Antimicrobial Activity of S, O and N-Donor Heterocyclic Schiff Base Ligands and their Co(II), Cd(II), Hg(II), Fe(III) and UO2(II) Metal Complexes

“…The reaction of ligands under study, L 1 -L 3 with Co(II), Cd(II), Hg(II), Fe(III), and UO 2 (II) ions afforded the mononuclear metal complexes (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15). The structure of the isolated complexes are discussed on the basis of their elemental analysis, conductance, IR, electronic spectral data, mass spectra and magnetic moment measurements.…”

“…They include Co(CH 3 COO) 2 .4H 2 O; Cd(NO 3 ) 2 .4H 2 O; Hg(CH 3 COO) 2 ; Fe(NO 3 ) 3 .9H 2 O UO 2 (NO 3 ) 2 .6H 2 O; succinic anhydride; 4-aminoantipyrine; 2-aminothiophenol; 2-aminopyridine, ethyl alcohol; diethylether, dimethyl formamide (DMF) and dimethyl sulfoxide (DMSO). Concentrated nitric acid and perchloric acid are reagent grade and used as supplied.…”

“…Additionally, the position of ν asy (OCO) and ν sy (OCO) bands at 1575 -1436 cm -1 and 1375 -1208 cm -1 , respectively in the IR spectra of acetato complexes, (1,3,6,8,11,13) as well as their difference, Δ > 185 cm -1 are characteristic for the monodentate coordination mode (24) . The nitrato complexes, (2,10,12,15) show three bands at 1492 -1404 cm -1 , 1374 -1234 cm -1 and 1170 -1026 cm -1 corresponding to unidentate coordination mode of nitrate group while the complexes, (4, 5, 7, 9, 14) have a characteristic strong absorption band at 1384 -1382 cm -1 and medium band at 815-764 cm -1 assigned to ionic nitrate, additionally complexes (4,5,7,9,14) show three bands at 1485-1442 cm -1 , 1296 -1200 cm -1 and 1166 -1020 cm -1 corresponding to unidentate coordination mode of nitrate group (25)(26)(27) . All these results are consistent with the conductance data.…”

“…The metal complexes were prepared by adding slowly a hot ethanolic solution of the appropriate metal salt (0.01 mol) namely; Co(CH 3 COO) 2 (o.o1mol). The reaction mixture was stirred and refluxed for 2hr on water bath.…”

“…The condensation of primary amines with carbonyl compounds are referred to as Schiff bases (1)(2)(3)(4) . Schiff bases play an important role in inorganic chemistry as they easily form stable complexes with most transition metal ions (5) .…”