Nickel(II) complexes of ONS donor Schiff base ligands: synthesis, combined DFT-experimental characterization, redox, thermal, and <i>in vitro</i> biological investigation

Maurya, R. C.; Malik, Bashir Ahmad; Mir, Jan Mohammad; Vishwakarma, P.K.; Rajak, D.K.; Jain, N.

doi:10.1080/00958972.2015.1064526

Cited by 37 publications

(13 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These bands are typical for square planar d 8 complexes 16 . The square planar geometry for the Ni(II) complex is also corroborated by the diamagnetic nature of the complex.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Untitled

2018

IJPSR

View full text Add to dashboard Cite

Synthesis and characterization of Co(II), Ni(II), Cu(II) and Pd(II) complexes of ligand N '-[(2Z,3E)-3-(hydroxyimino) butan-2-ylidene] benzohydrazide are reported. The ligand is monobasic and bidentate in nature. The molar conductivities reveal that all the metal complexes are nonelectrolyte. The metal complexes have been characterized on the basis of spectral and magnetic studies. Co(II) ion forms brown complex Co(BBH) 2 which has low spin square planar geometry. The diamagnetic nature and the spectral features of the brown Ni(BBH) 2 complex suggests the square planar environment for the Ni(II) ion. Ni(BBH) 2 adds on two molecules of pyridine to form a high spin six coordinate adduct. The room temperature magnetic susceptibility measurements of the pyridine adduct of Ni(BBH) 2 indicates octahedral nature of the complex which is further supported by the absorption spectrum. The magnetic data in case of Cu(BBH) 2 indicates presence of one unpaired electron in Cu(II) ion. The EPR spectrum of Cu(BBH) 2 suggests the square planar geometry which is further supported by electronic absorption spectrum of the complex. Studies reveal square planar geometry for Pd(BBH) 2 complex.

show abstract

“…These bands are typical for square planar d 8 complexes 16 . The square planar geometry for the Ni(II) complex is also corroborated by the diamagnetic nature of the complex.…”

Section: Resultsmentioning

confidence: 99%

“…The square planar geometry for the Ni(II) complex is also corroborated by the diamagnetic nature of the complex. Ni(BBH) 2 16 . However, due to the high intensity charge transfer transitions, these bands are masked.…”

Section: Resultsmentioning

confidence: 99%

Untitled

2018

IJPSR

View full text Add to dashboard Cite

show abstract

“…The complex [Ni2(L)(dmphen)2]Cl2 showed d-d band at 574 nm, assigned as 1 A1g→ 1 A2g transition which refers to the square planar geometry around the Ni(II) ion [17]. In complex [Ni2(L)(phen)2]Cl2, the weak d-d transition bands are not observed probably because the bands are lost in the low energy tail of intense charge transfer band [18,19], whereas, in cobalt complexes [Co2(HL)(dmphen)2Cl4], [Co2(HL)(phen)2Cl4] the d-d transitions ascertained at 640 and 617 nm, respectively. These bands are assigned as a 4 T1g(F)→ 4 A2g(F) transition [20], usually the octahedral complexes contain three bands, but here only one band is appeared.…”

Section: Electronic Spectramentioning

confidence: 99%

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.

View full text Add to dashboard Cite

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

show abstract

“…Hence, the ligand exhibit their greatest affinity toward the Ni(II) ion and the least toward the Cu(II) ion. The values of some global reactivity descriptors [32][33][34] investigated are presented in Table 3.…”

Section: Reactivity Descriptorsmentioning

confidence: 99%

Experimental and Theoretical Investigation of 3D-Metal Complexes Derived from N-(1H-Benzimidazol-2-yl)-2-mercaptoacetamide Derivative

2019

Chem Sci Trans

View full text Add to dashboard Cite

New trinuclear metal complexes of Co(II), Ni(II), Cu(II) and Zn(II) with N-(1Hbenzimidazol-2-yl)-2-mercaptoacetamide (BMA) were synthesized from chloride salts of relative metals in butanol medium. Synthesized metal complexes were characterized by elemental analysis, conductance measurements, IR, UV-Vis, ESR, TGA & DTA and magnetic susceptibility measurements. IR spectral data suggest that the ligand behaves as monobasic tridentate (NOS) with donor sites of azomethine nitrogen (ring), oxygen atom of carbonyl group and thio group. Physicochemical data suggest tetrahedral geometry for Co(II), Ni(II) and Zn(II) complexes. Square planar intended for Cu(II) complex and all these complexes exhibits non-elecrolytic nature. The complexes were evaluated for their antimicrobial activity by in-vitro antimicrobial screening against bacteria Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Klebsiella Pneumonia. The results indicate that antimicrobial activity increased during metallation. A detailed analysis is done theoretically using DFT method with B3LYP/6-311G/LanL2DZ functional for ligand and complexes. Docking studies of ligand and metal complexes carried out using OPLS 2005 force field in Schrodinger suite.

show abstract

Nickel(II) complexes of ONS donor Schiff base ligands: synthesis, combined DFT-experimental characterization, redox, thermal, and in vitro biological investigation

Cited by 37 publications

References 63 publications

Untitled

Untitled

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

Experimental and Theoretical Investigation of 3D-Metal Complexes Derived from N-(1H-Benzimidazol-2-yl)-2-mercaptoacetamide Derivative

Contact Info

Product

Resources

About