E.s.r. studies on acylhydrazine and hydrazone copper(II) sulfate complexes

Characterization of Eu(III) Complex for Determination of Bumetanide in Pharmaceutical Preparations and in Biological Fluids

“…The molar conductivity of 1 x 10 -3 M solution of the metal complex 1 in DMSO at room temperature was found to be 32.52 ohm -1 cm 2 mol -1 (Table 2) indicating that the complex is nonelectrolytic in nature (24,25) . The magnetic moment value of complex 1 was measured using Gouy method and was found 3.12 B.M ( Table 2).…”

“…These bands were shifted (26-38 cm -1 ) by complexation, and these changes could be attributed to the change in rigidity of the ligand ring due to complexation (20). In complex 1 a broad band appeared in the range 3000-3600 cm −1 assigned to the water molecules and/or to the OH stretching vibration of the ligands and/or the ethanol molecules present in the complex (22)(23)(24) . The new bands at 505 cm -1 observed in complex 1 were attributed to M-O bond in complex 1 (25)(26)(27)(28)(29)(30)(31)(32) .…”

“…The magnetic moment value of complex 1 was measured using Gouy method and was found 3.12 B.M ( Table 2). The Eu(III) ions were paramagnetic due to their 4f-electrons that were effectively shielded by 5s 2 5p 6 electrons (24) .…”

Synthesis, physico-chemical studies of manganese(II), cobalt(II), nickel(II), copper(II) and zinc(II) complexes with some p-substituted acetophenone benzoylhydrazones and their antimicrobial activity

“…All the metal complexes also show weak bands in the 901-910, 752-760 and 638-649 cm 21 ranges due to coordinated water [25]. The bands observed near 1200-1220, 1160-1175 and 1040-1060 cm 21 ranges suggest the presence of bidentate chelating sulfate groups in all the metal(II) sulfate complexes.…”

Synthesis, characterization and biocidal activity of some transition metal(II) complexes with isatin salicylaldehyde acyldihydrazones

“…In particular, the high field region of the spectra of [Cu(isodh-2H)] complex is partially resolved into its g x and g y components (g x = 2.0469, g y = 2.0215) and the average g ⊥ value is calculated by the expression g ⊥ = ½ (g x + g y ). This may be due to a small orthorhombic component superimposed on the perpendicular component, thereby lowering the equatorial symmetry 30 . The observed g and A values for isodh complex suggest a square planar geometry around Cu(II) ion.…”