Syntheses and characterizations of square planar nickel(II) complexes with pendant ligands: Examples of bi-dentate bonding modes of potentially tri- and tetra-dentate Schiff bases

Bag, Saswati P.; Bhaumik, Prasanta Kumar; Jana, Subrata; Das, Mithun; Bhowmik, Pradip K.; Chattopadhyay, Shouvik

doi:10.1016/j.poly.2013.08.028

Cited by 18 publications

(5 citation statements)

References 45 publications

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“…In IR spectra of both complexes, bands corresponding to >C=N‐ groups are observed within 1625–1640 cm −1 . Both complexes in their IR spectra show strong bands around 1523 cm −1 due to the presence of keto group (C=O) and medium strong band at 1222 cm −1 due to the presence of C−O (phenoxy) stretching . Sharp band in the IR spectrum of complex 1 at 2027 cm −1 indicates the presence of terminal azide .…”

Section: Resultsmentioning

confidence: 99%

Two Cobalt(III) Schiff Base Complexes of the Type [Co(ABC)(DE)X]: Facile Synthesis, Characterization, Catechol Oxidase and Phenoxazinone Synthase Mimicking Activity

2017

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Two new mononuclear cobalt(III) Schiff base complexes with azide or thiocyanate [Co(L 1 )(L')(N 3 )] (1) and [Co(L 2 )(L")(NCS)] (2) {where HL 1 = 2((2(piperidin-1-yl)ethylimino)methyl)-6-ethoxyphenol, HL 2 = 2-((3(dimethylamino)propylimino)methyl)-6-methoxyphenol, HL' = 1-acetyl-2-naphthol and HL" = 2,4-pentane-dione} have been synthesized and characterized by single crystal X-ray diffraction studies. Both complexes may be represented by a general formula: [Co(ABC)(DE)X], where ABC, DE and X represent tridentate, bidentate and monodentate ligands respectively. Both complexes are reactive towards the aerial oxidation of 3,5-di-tert-butylcatechol (3,5-DTBC) and oaminophenol (OAPH), and kinetics of the reactions are monitored spectrophotometrically. Analyses of the kinetic data reveal that complex 2 is better catalyst than complex 1 for both oxidation reactions. Tentative mechanistic implications of the catalytic oxidation reactions are also discussed. Mechanistic investigations of the catalytic behaviors indicate that the oxidation reactions proceed through catalyst-substrate intermediates. Results and discussion SynthesisThe Schiff base ligand, HL 1 , was synthesized by the 1:1 condensation of 1-(2-aminoethyl)piperidine with 3-ethoxysali-[a] K.

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Section: Resultsmentioning

confidence: 99%

Two Cobalt(III) Schiff Base Complexes of the Type [Co(ABC)(DE)X]: Facile Synthesis, Characterization, Catechol Oxidase and Phenoxazinone Synthase Mimicking Activity

2017

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“…Among different Schiff bases, N 2 O donor salicylidimine Schiff bases [11][12][13], have widely been used by several groups to form different homo and hetero polynuclear complexes with several transition and non-transition metal ions [14][15][16][17][18][19][20]. On the other hand, there have been immense interests in studying supra-molecular structures [21].…”

Section: Introductionmentioning

confidence: 99%

Mono, di and trinuclear photo-luminescent cadmium(II) complexes with N2O and N2O2 donor salicylidimine Schiff bases: Synthesis, structure and self assembly

Roy¹,

Chattopadhyay²

2015

Inorganica Chimica Acta

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“…These magnetic moment values attribute the di nuclear nature of complexes and it may be occurred due to the weak anti ferromagnetic intra molecular coupling interaction between the two metal ions [18,21]. Whereas nickel complexes are diamagnetic in nature, it suggests the square planar geometry around nickel(II) ion [22,23]. Based on above spectral data, the proposed structures of metal complexes are shown in Scheme 2.…”

Section: Magnetic Momentsmentioning

confidence: 93%

Synthesis, characterization, docking and antimicrobial activity studies of binuclear Co(II) and Ni(II) complexes of bis aroylhydrazone and phenanthroline

K.¹,

Daravath²,

Narendrula³

et al. 2022

Bull. Chem. Soc. Eth.

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ABSTRACT. Schiff base (HL) N1,N3-bis(4-(methylthio)benzylidene)-5-nitrobenzene-1,3-dihydrazide (HL) has been prepared from condensation of 4-(methyl thio)benzaldehyde with 5-nitrobenzene-1,3-dihydrazide. Binucleated mixed ligand complexes of nickel(II) ([Ni2(L)(dmphen)2]Cl2, [Ni2(L)(phen)2]Cl2) and cobalt(II) ([Co2(HL)(dmphen)2]Cl2, [Co2(HL)(phen)2]Cl2) complexes have been synthesized from Schiff base (HL) and 1,10-phenanthroline/2,9-dimethyl-1,10-phenanthroline. The synthesized compounds have been characterized by elemental analysis, 1H-NMR, 13C-NMR, FT-IR, UV-Visible, magnetic moment, SEM, powder X-ray diffraction and molar conductivity measurements. Further, the Schiff base and its metal complexes have been investigated for fluorescence activity and molecular docking studies. In addition, Schiff base and its metal complexes were screened for antimicrobial activity against bacteria: Escherichia coli, Bacillus subtilis and fungi: Sclerotium rolfsii and Macrophomina phaseolina. KEY WORDS: Growth inhibitors, Ternary complex, Tuberculosis, Fluorescence activity, Crystal system Bull. Chem. Soc. Ethiop. 2021, 35(3), 499-511. DOI: https://dx.doi.org/10.4314/bcse.v35i3.3

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Syntheses and characterizations of square planar nickel(II) complexes with pendant ligands: Examples of bi-dentate bonding modes of potentially tri- and tetra-dentate Schiff bases

Cited by 18 publications

References 45 publications

Two Cobalt(III) Schiff Base Complexes of the Type [Co(ABC)(DE)X]: Facile Synthesis, Characterization, Catechol Oxidase and Phenoxazinone Synthase Mimicking Activity

Two Cobalt(III) Schiff Base Complexes of the Type [Co(ABC)(DE)X]: Facile Synthesis, Characterization, Catechol Oxidase and Phenoxazinone Synthase Mimicking Activity

Mono, di and trinuclear photo-luminescent cadmium(II) complexes with N2O and N2O2 donor salicylidimine Schiff bases: Synthesis, structure and self assembly

Synthesis, characterization, docking and antimicrobial activity studies of binuclear Co(II) and Ni(II) complexes of bis aroylhydrazone and phenanthroline

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