Synthesis and physicochemical studies of some semicarbazone complexes

Badwaik, V. B.; Aswar, A. S.

doi:10.1134/s1070328408030056

Cited by 8 publications

(6 citation statements)

References 9 publications

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“…Plots of log σ against 1/ T are found to have a linear relationship with temperature in the range 30–100°C, indicating the semiconducting behaviour of the complexes . The activation energy values are seen to decrease while the conductivity increases.…”

Section: Resultsmentioning

confidence: 86%

Synthesis, characterization, corrosion inhibition of mild steel in HCl (0.5 N) solution and solid‐state electrical conductivity of new Co(II), Ni(II), Cu(II) and Zn(II) complexes

Nassar

Hassan

Elkmash

2016

Applied Organom Chemis

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This work consists of a study of the corrosion‐inhibiting and semiconducting properties of new binuclear Co(II), Ni(II), Cu(II) and Zn(II) complexes with a Schiff base, H2L, obtained from the 2:1 M condensation of salicylaldehyde and o‐dianisidine, respectively. Elemental, spectral and thermal analyses were used to characterize these complexes. The magnetic susceptibilities of these complexes were also determined. Weight loss, potentiodynamic polarization and scanning optical microscopy were the techniques used to investigate the efficiency of these new compounds as corrosion inhibitors. The antibacterial activity of the compounds was measured against sulfate‐reducing bacteria. It was found that inhibition occurs via the chemisorption of metal complexes on the steel surface. This absorption obeys the Langmuir adsorption isotherm model.

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Section: Resultsmentioning

confidence: 86%

Synthesis, characterization, corrosion inhibition of mild steel in HCl (0.5 N) solution and solid‐state electrical conductivity of new Co(II), Ni(II), Cu(II) and Zn(II) complexes

Nassar

Hassan

Elkmash

2016

Applied Organom Chemis

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“…The results (Table ) show that the ligand exhibits better antibacterial activity against Erwinia carotovora and Bacillus stubtilis than all investigated complexes . The increase in biological activity of Schiff base is due to the presence of uncoordinated azomethine linkage (C=N) . According to the basis of Overton's concept and Tweedy's chelation theory, the results showed that the complexes ( 2 ), ( 4 ), ( 5 ) are better antibacterial against Proteus vulgaris and Staphylococcus aureus than the inactive ligand.…”

Section: Resultsmentioning

confidence: 99%

“…[10,66] The increase in biological activity of Schiff base is due to the presence of uncoordinated azomethine linkage (C=N). [109,110] According to the basis of Overton's concept and Tweedy's chelation theory, [109] the results showed that the complexes (2), (4), (5) are better antibacterial against Proteus vulgaris and Staphylococcus aureus than the inactive ligand. Also, the data depict that complex (3) is more active against Staphylococcus aureus than complexes (2), (4), (5) and (7) relative to Sterptomycin (standard drug), while the other complexes (1,6) and the ligand do not exhibit activity against this type of bacteria.…”

Section: Antioxidant Activitymentioning

confidence: 99%

Structural characterization, thermal investigation and biological activity of metal complexes containing Schiff Base ligand (Z)‐3‐(1‐((4,6‐dimethyl‐1H‐pyrazolo[3,4‐b] pyridin‐3‐yl)imino)ethyl)‐4‐hydroxy‐6‐methyl‐2H‐pyran‐2‐one

Emam

Abouel‐Enein

Abdel‐Satar

2019

Applied Organom Chemis

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A new series of metal complexes containing Co(II), Pd(II), Fe(III) chloride and Cu(II) salts (chloride, bromide, sulphate and perchlorate) have been prepared with Schiff base ligand (HL). The synthesized compounds were elucidated using elemental analyses, spectral techniques, molar conductance, magnetic measurements and thermogravimetric studies. The analytical data established (1 M:1 L) stoichiometry for complexes (1), (2), (4), (6) and (7) as well as (1 M:2 L) and (2 M:3 L) stoichiometry for complexes (5) and (3), respectively. As a result, the ligand HL coordinates in complexes (1), (2), (4), (6) as a monobasic tridentate ONN moiety via the oxygen atom of the deprotonated phenolic OH, the nitrogen atoms of the azomethine and the imine group in pyrazolopyridine ring. While, it behaves as a neutral bidentate in complexes (3,7), chelates via oxygen and nitrogen atoms of enolic OH and azomethine groups. Also, in complex (5) Cu2+ ion binds via NO sits of two ligand molecules in its monobasic and neutral forms. The magnetic moment and electronic spectral data proposed octahedral structure for complexes (2, 3 and 7) as well as triagonal bipyramidal and square pyramidal geometry for complexes (1 and 4), while, chelates (5) and (6) possess square planar geometry. TG/DTG studies confirmed the chemical formula for these complexes and established the thermal decomposition processes ended with the formation of metal or metal oxides contaminated with carbon residue. An axial electron spin resonance spectra were suggested for Cu(II) complexes pointing to 2B1g as a ground state with hyperfine structure for complex (4). In vitro antibacterial and antioxidant activities were performed for HL ligand and its metal complexes. The biological studies indicate that complex (3) has better antibacterial activity compared to the ligand and the other complexes.

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“…The solid state DC electrical conductivity of the synthesized ligand and its complexes in compressed pellet form (5 ton cm À2 ) was measured in the temperature range 313-398 K and a linear dependence of log ¼ f(10 3 /T) from Arrhenius plot of electrical conductivity, indicates the semiconducting behavior of these compounds [32]. The electrical conductivity () varies exponentially with the absolute temperature according to the relation ¼ o exp(ÀE a /KT), where o is constant, E a is the activation energy of electrical conduction, T the absolute temperature and K the Boltzman constant.…”

Section: Solid State Conductivitymentioning

confidence: 99%

Transition metal complexes of a Schiff base: synthesis, characterization, and antibacterial studies

Badwaik

Deshmukh

Aswar

2009

Journal of Coordination Chemistry

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Synthesis of a new Schiff base derived from 2-hydroxy-5-methylacetophenone and glycine and its coordination with compounds Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), and UO 2 (VI) are described. The ligand and complexes have been characterized on the basis of analytical, electrical conductance, infrared, ESR and electronic spectra, magnetic susceptibility measurements, and thermogravimetric analysis. The ligand is a dibasic tridentate (ONO) donor in all the complexes except Zn(II), where it is a monobasic bidentate (OO) donor. The solid state DC electrical conductivity of ligand and its complexes have been measured over 313-398 K, and the complexes were semiconducting. Antibacterial activities of ligand and its metal complexes have been determined by screening the compounds against various Gram (þ) and Gram (À) bacterial strains.

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Synthesis and physicochemical studies of some semicarbazone complexes

Cited by 8 publications

References 9 publications

Synthesis, characterization, corrosion inhibition of mild steel in HCl (0.5 N) solution and solid‐state electrical conductivity of new Co(II), Ni(II), Cu(II) and Zn(II) complexes

Synthesis, characterization, corrosion inhibition of mild steel in HCl (0.5 N) solution and solid‐state electrical conductivity of new Co(II), Ni(II), Cu(II) and Zn(II) complexes

Structural characterization, thermal investigation and biological activity of metal complexes containing Schiff Base ligand (Z)‐3‐(1‐((4,6‐dimethyl‐1H‐pyrazolo[3,4‐b] pyridin‐3‐yl)imino)ethyl)‐4‐hydroxy‐6‐methyl‐2H‐pyran‐2‐one

Transition metal complexes of a Schiff base: synthesis, characterization, and antibacterial studies

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