Some Metal(II) Complexes of O-Aminoacetophenone Benzoylhydrazone (Aabh): Their Preparation, Characterization and Antimicrobial Activity

Nawar, Nagwa; Khattab, M. A.; Hosny, Nasser Mohammed

doi:10.1080/00945719909351705

Cited by 38 publications

(22 citation statements)

References 23 publications

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“…2 A 1g transition. The electronic spectral data together with the magnetic moment value (1.93 BM) obtained is in agreement with the square planar geometry around copper (II) ion [49]. Zinc (II) complex is diamagnetic and a tetrahedral geometry is most preferable for four coordinated zinc (II) complex.…”

Section: Electronic Spectra and Magnetic Susceptibility Measurementssupporting

confidence: 76%

Studies on metal complexes of 1-((8-hydroxyquinolin-5-yl)methyl)-3-(thiazol-2-ylimino)indolin-2-one

Patel

2015

Res Chem Intermed

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Novel ligand 1-((8-hydroxyquinolin-5-yl)methyl)-3-(thiazol-2-ylimino)indolin-2-one was synthesized by condensation of 5-(chloromethyl)-1,8a-dihydroquinolin-8-ol with 3-(thiazol-2-ylimino)indolin-2-one. Metal complexes of this ligand were prepared using various transition metal ion salts, viz., Mn(II), Fe(II), Co(II), Ni(II), Cu(II), and Zn(II). All synthesized compounds were characterized by various spectroscopic techniques. Thermogravimetric analysis of metal complexes was also carried out. Geometry of the metal complexes was carried out by electronic spectral analysis and magnetic measurement studies. The ligand and metal complexes were screened for their antibacterial activities against Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, Proteus vulgaris, and Pseudomonas aeruginosa. The metal complexes are found more potent bactericides than the ligand. The interaction of ligand and its complexes with plasmid (pUC 19) DNA and calf thymus DNA was investigated by gel electrophoresis measurements. The superoxide dismutase mimetic activity of the ligand and its metal complexes has also been assessed for their ability to inhibit the reduction of nitrobluetetrazolium chloride.

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Section: Electronic Spectra and Magnetic Susceptibility Measurementssupporting

confidence: 76%

Studies on metal complexes of 1-((8-hydroxyquinolin-5-yl)methyl)-3-(thiazol-2-ylimino)indolin-2-one

Patel

2015

Res Chem Intermed

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“…The magnetic moments of the Co 2+ and Cu 2+ complexes of the ligand at room temperature fall in the range 4.12 µ B for Co 2+ and 1.80 µ B for Cu 2+ , which is characteristic of mononuclear octahedral Co 2+ and square planar Cu 2+ complexes. The magnetic moment values of the diamagnetic Ni 2+ , Zn 2+ , and Cd 2+ complexes of the ligand are also consistent with a square planar geometry for the Ni 2+ complex and a tetrahedral geometry for the Zn 2+ and Cd 2+ complexes [34][35][36][37].…”

Section: Resultsmentioning

confidence: 80%

Spectroscopic Characterization of N,N-bis(2-{[(2,2-Dimethyl-1,3-Dioxolan-4-yl)Methyl]Amino}Ethyl) N′,N′-Dihydroxyethanediimidamide and Its Complexes

Canpolat

Kaya

2005

Russ J Coord Chem

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1 Transition metal complexes of vic -dioximes have been of particular interest as biological model compounds [1]. The high stability of the complexes prepared with dioxime ligands has been extensively used for various purposes including model compounds for vitamin B 12 or trace metal analysis [2]. Coordination compounds of vic -dioximes have been widely investigated as analytical reagents, models for biological systems, such as vitamin B 12 , compounds having columnar stacking thought to be a reason for their semiconducting properties, and recently in dioxime reactions [3]. Among three isomers, namely, anti, amphi , and syn , the first isomer is more liable to form N,N-coordinated planar complexes stabilized by hydrogen bonding [4]. The presence of mildly acidic hydroxyl groups and slightly basic nitrogen atoms make vic -dioximes amphoteric ligands forming corrin-type, square planar, square pyramidal, and octahedral complexes with transition metal ions, such as Co 2+ , Ni 2+ , Cu 2+ , and Co 3+ as central atoms [5].The chemistry of oxime/oximato metal complexes has been developed actively since the time of the first synthesis, e.g. preparation of nickel(II) dimethylglyoximate, and recognition of the chelate five-membered character of this complex by Chugaev [6]. Coordinated oxime ligands and oxime complexes display an impressively rich variety of reactivity modes and give unusual types of chemical compounds [7]. Some recently 1 The text was submitted by the authors in English. reviewed data show that oximes, although being classical ligands [8], display a variety of reactivity modes unusual even for the modern coordination chemistry [9, 10].We have focused on the synthesis and characterization of various types of vic -dioximes and their transition metal complexes [11][12][13][14][15][16][17][18][19]. The aim of this work is the synthesis and characterization of the dioxime ligand and its Co 2+ , Ni 2+ , Cu 2+ , Zn 2+ , and Cd 2+ metal complexes. EXPERIMENTALThe preparation of ( E , E )-dichloroglyoxime has been described previously [20]. All the reagents used were purchased from Merck, Fluka, or Sigma and are chemically pure.Elemental analyses (C, H, N) were performed on a LECO-932 CHNSO elemental analyses apparatus. IR spectra were recorded on a Mattson 1000 FT-IR spectrometer with KBr pellets. 1 H and 13 C NMR spectra were recorded on a Bruker GmbH Dpx-400 MHz high performance digital FT-NMR spectrometer (in DMSO-d 6 ). Electronic spectra were obtained on a Shimadzu 1240 UV spectrometer. Magnetic susceptibilities were determined on a Sherwood Scientific magnetic susceptibility balance (Model MK1) at room temperature using Hg [ Co ( SCN ) 4 ] as a calibrate; diamagnetic corrections were calculated from Pascal's constants. Melting points were determined on a Gallenkamp melting point apparatus. Molar conductances of the dioxime ligand and its Abstract -A new dioxime ligand, N , N -bis (2-{[(2,2-dimethyl-1,3-dioxolan-4-yl)methyl]amino}ethyl) N ', N '-dihydroxyethanediimidamide (H 2 L), and its mononuclear complexes...

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“…2 A 1g transition. This transition together with the magnetic moment value (Table 1) supports a square planar geometry for the copper(II) complex [16]. However zinc(II) ion is flexible with respect to a number of ligands that can be adopted in the coordination sphere.…”

Section: Electronic Spectramentioning

confidence: 69%

Synthesis, Characterization, Electrochemical Properties and Antibacterial Activity of Some Transiton Metal Complexes with [(2-hydroxy-1-naphthaldehyde)-3-isatin]-bishydrazone

Murukan

Mohanan

2006

Transition Met Chem

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A bishydrazone was prepared by reacting isatin monohydrazone with 2-hydroxy-1-naphthaldehyde and a series of metal complexes with this new ligand were synthesised by reaction with Mn II , Fe II , Co II , Ni II , Cu II and Zn II salts. The complexes were characterised on the basis of elemental analysis, molar conductance, magnetic susceptibility data, u.v.-visible, i.r., e.s.r. and n.m.r. spectral studies, wherever possible and applicable. Analytical data reveal that the nickel(II), copper(II) and zinc(II) complexes possess 1:1 metal-ligand ratios and that manganese(II), iron(II) and cobalt (II) complexes exhibit 1:2 ratios. Infrared spectral data suggest that the bishydrazone behaves as a monobasic tridentate ligand with ONO donor sequence towards the metal ions. X-ray diffraction study of the copper(II) complex indicated an orthorhombic crystal lattice. The e.p.r. spectral data show that the metal-ligand bond has considerable covalent character. The electrochemical behaviour of the copper(II) complex was investigated by cyclic voltammetry (CV). Antibacterial tests of the ligand and the metal complexes were also carried out and it has been observed that the complexes are more potent bactericides than the ligand.

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Some Metal(II) Complexes of O-Aminoacetophenone Benzoylhydrazone (Aabh): Their Preparation, Characterization and Antimicrobial Activity

Cited by 38 publications

References 23 publications

Studies on metal complexes of 1-((8-hydroxyquinolin-5-yl)methyl)-3-(thiazol-2-ylimino)indolin-2-one

Studies on metal complexes of 1-((8-hydroxyquinolin-5-yl)methyl)-3-(thiazol-2-ylimino)indolin-2-one

Spectroscopic Characterization of N,N-bis(2-{[(2,2-Dimethyl-1,3-Dioxolan-4-yl)Methyl]Amino}Ethyl) N′,N′-Dihydroxyethanediimidamide and Its Complexes

Synthesis, Characterization, Electrochemical Properties and Antibacterial Activity of Some Transiton Metal Complexes with [(2-hydroxy-1-naphthaldehyde)-3-isatin]-bishydrazone

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