SYNTHESIS AND CHARACTERIZATION OF SOME BIVALENT METAL COMPLEXES OF SCHIFF BASES DERIVED FROM<i>as</i>-TRIAZINE

Singh, Gurmit; Singh, Ph. Ashutosh; Sen, Ashok K; Singha, Kiran; Dubeya, Surendra N.; Handa, R. N.; Choi, Jonghyun

doi:10.1081/sim-120013155

Cited by 33 publications

(16 citation statements)

References 10 publications

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“…The 1:1 and 1:2 Co(II) complexes show magnetic moment(l eff ) 4.71 and 4.78 BM, respectively, which is within the expected range of octahedral complex (4.3-5.2 BM) (Singh et al, 2002(Singh et al, , 2006Al Burtamani et al, 2005). The 1:1 and 1:2 Nickel complexes show magnetic moment 3.11 and 3.35 BM, suggest octahedral geometry.…”

Section: Magnetic Datamentioning

confidence: 76%

“…2. A band at 1589 cm -1 in the spectra of Schiff base has been assigned to the azomethine group frequency m(N=CH), which shifts towards lower frequency (Singh et al, 2002(Singh et al, , 2007 by 15-20 cm -1 in the spectra of the complexes, indicating coordination through the nitrogen atom. Further coordination of metal to azomethine nitrogen is confirmed by a new band around 480-513 cm -1 due to m(M-N).…”

Section: Ir Spectramentioning

confidence: 99%

“…These spectral data have been interpreted based on literature data (Singh et al, 2002(Singh et al, , 2006(Singh et al, , 2007. In the spectra of Schiff base signal at d 8.22 is assigned to azomethine proton (-HC=N-), which shifted downfield in the spectra of metal complexes indicating coordination through the azomethine nitrogen.…”

Section: H Nmr Spectramentioning

confidence: 99%

“…Synthesis of new Schiff bases and their metal complexes still the aim of many recent investigations (Lacroxi et al, 2004;Golcu et al, 2005;Dhar et al, 2005;Peppel and Kockerling, 2009). Therefore, in continuation of our previous studies on characterization of transition metal complexes (Singh et al, 2002(Singh et al, , 2007, the present investigation deals with the synthesis, characterization and thermal studies of Co(II), Ni(II), Cu(II) and Zn(II) complexes of Schiff base derived from 4-amino-3-mercapto-6-methyl-5-oxo-1,2,4-triazine and syringaldehyde (4-hydroxy-3,5-dimethoxybenzaldehyde) (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, spectroscopic, thermal and antimicrobial studies of Co(II), Ni(II), Cu(II) and Zn(II) complexes with Schiff base derived from 4-amino-3-mercapto-6-methyl-5-oxo-1,2,4-triazine

et al. 2011

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Coordination complexes of Co(II), Ni(II), Cu(II) and Zn(II) with Schiff base derived from syringaldehyde and 4-amino-3-mercapto-6-methyl-5-oxo-1,2,4-triazine have been synthesized. These complexes have been characterized by elemental analysis, magnetic moment, spectroscopic (IR, Electronic, 1 H NMR, ESR) and thermogravimetric analysis. Magnetic and spectral data suggest octahedral geometry for Co(II), Ni(II) and Zn(II) complexes and square planar for Cu(II) complexes. The presence of coordinated water in metal complexes was confirmed by thermal and IR data. The Schiff base and its metal complexes have been screened for antibacterial (Pseudomonas aeruginosa, Bacillus subtilis, Escherichia coli, Staphylococcus aureus) and antifungal activities (Aspergillus niger, A. flavus). A comparison is made between activities of complexes with Schiff base and with the standard antibiotics.

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Section: Magnetic Datamentioning

confidence: 76%

Section: Ir Spectramentioning

confidence: 99%

Section: H Nmr Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis, spectroscopic, thermal and antimicrobial studies of Co(II), Ni(II), Cu(II) and Zn(II) complexes with Schiff base derived from 4-amino-3-mercapto-6-methyl-5-oxo-1,2,4-triazine

et al. 2011

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“…The magnetic susceptibilities of polycrystalline powders of compounds 1 and 2 were measured over a temperature range of 75-300 K. The observed effective magnetic moments are 4.98 m B (m B E9:27 Â 10 À24 J T À1 ) for 1 and 4.85 m B for 2 at 300 K, which are within the expected range (4.3-5.2 m B ) for isolated d 7 high-spin, sixcoordinated Co(II) complexes [19] and agree well with other observed effective magnetic moments of Co(II) complexes [20]. The plots of the observed effective magnetic moments vs. the temperature for the two compounds are shown in Fig.…”

Section: Magnetic Propertiesmentioning

confidence: 82%

Syntheses, crystal structures and properties of Co(II) complexes with N,N′-bis(3-pyridylmethyl)-1,4-benzenedimethyleneimine (bpb), and Cd(II), Hg(II) complexes with reduced bpb

Kong¹,

Zhu²,

Okamura³

et al. 2004

Journal of Solid State Chemistry

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Improved Palladium and Nickel Catalysts Heterogenised on Oxidic Supports (Silica, MCM‐41, ITQ‐2, ITQ‐6)

et al. 2004

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Two series of solid catalysts in which a chiral palladium or nickel complex with Schiff bases as ligands have been immobilized on ordered mesoporous silica supports (MCM-41), delaminated ITQ-2, ITQ-6 zeolites and amorphous silica have been prepared. Hydrogenation of alkenes and imines was studied with the homogeneous as well as with the counterpart heterogenized catalysts. The high accessibility introduced by the structure of the supports allows the preparation of highly efficient immobilized catalysts with TOFs of 1,000,000 h À 1. A moderate acidity in the support increases the catalytic activity considerably, and the easy recoverable immobilized catalysts can duplicate the activity of the homogeneous analogues. No deactivation of the catalysts was observed after repeated recycling.

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SYNTHESIS AND CHARACTERIZATION OF SOME BIVALENT METAL COMPLEXES OF SCHIFF BASES DERIVED FROMas-TRIAZINE

Cited by 33 publications

References 10 publications

Synthesis, spectroscopic, thermal and antimicrobial studies of Co(II), Ni(II), Cu(II) and Zn(II) complexes with Schiff base derived from 4-amino-3-mercapto-6-methyl-5-oxo-1,2,4-triazine

Synthesis, spectroscopic, thermal and antimicrobial studies of Co(II), Ni(II), Cu(II) and Zn(II) complexes with Schiff base derived from 4-amino-3-mercapto-6-methyl-5-oxo-1,2,4-triazine

Syntheses, crystal structures and properties of Co(II) complexes with N,N′-bis(3-pyridylmethyl)-1,4-benzenedimethyleneimine (bpb), and Cd(II), Hg(II) complexes with reduced bpb

Improved Palladium and Nickel Catalysts Heterogenised on Oxidic Supports (Silica, MCM‐41, ITQ‐2, ITQ‐6)

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