Synthesis of Some Organometallic Complexes of Ti(IV)/Zr(IV) Involving Sulfur Containing Schiff Base Ligands: Spectral, Electrochemical, Surface Morphology, and Antimicrobial Studies

2015 ◽  
Vol 45 (10) ◽  
pp. 1549-1557 ◽  
Author(s):  
J. Pushparajan ◽  
M. sivasankaran Nair
Keyword(s):  
Schiff Base ◽  
Surface Morphology ◽  
Organometallic Complexes ◽  
Schiff Base Ligands ◽  
Antimicrobial Studies ◽  
Sulfur Containing

scholarly journals Synthesis and Spectroscopic and Antimicrobial Studies of Schiff Base Metal Complexes Derived from 2-Hydroxy-3-methoxy-5-nitrobenzaldehyde

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
K. R. Joshi ◽  
A. J. Rojivadiya ◽  
J. H. Pandya
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Dilution Method ◽  
Aspergillus Clavatus ◽  
Schiff Base Ligands ◽  
Gram Positive Bacteria ◽  
H Nmr ◽  
Antimicrobial Studies ◽  
Schiff Base Metal Complexes ◽  
Broth Dilution

Two new series of copper(II) and nickel(II) complexes with two new Schiff base ligands 2-((2,4-dimethylphenylimino)methyl)-6-methoxy-4-nitrophenol and 2-((3,4-difluorophenylimino)methyl)-6-methoxy-4-nitrophenol have been prepared. The Schiff base ligands were synthesized by the condensation of 2-hydroxy-3-methoxy-5-nitrobenzaldehyde with 2,4-dimethylaniline or 3,4-difluoroaniline. The ligands and their metal complexes have been characterized by IR, 1H NMR, mass and electronic spectra and TG analysis. The Schiff base ligands and their metal complexes were tested for antimicrobial activity against Gram positive bacteria Staphylococcus aureus, and Streptococcus pyogenes and Gram negative bacteria Escherichia coli, and Pseudomonas aeruginosa and fungus Candida albicans, Aspergillus niger, and Aspergillus clavatus using Broth Dilution Method.

Orthometallation in bidentate Schiff base ligands via C–H activation: synthesis of ruthenium(III) organometallic complexes

2015 ◽  
Vol 40 (8) ◽  
pp. 831-837 ◽  
Author(s):  
Kaushik Ghosh ◽  
Rajan Kumar ◽  
Sushil Kumar ◽  
Manju Bala ◽  
Udai P. Singh
Keyword(s):  
Schiff Base ◽  
Organometallic Complexes ◽  
Schiff Base Ligands

Nickel(II) complexes with sulfur containing Schiff base ligands

1970 ◽  
Vol 9 (11) ◽  
pp. 2608-2610 ◽  
Author(s):  
George R. Brubaker ◽  
Jean C. Latta ◽  
Dolores C. Aquino
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligands ◽  
Sulfur Containing

scholarly journals Rhodium and Iridium Mediated C-H and O-H Bond Activation of Two Schiff Base Ligands: Synthesis, Characterization and Catalytic Properties of the Organometallic Complexes

2021 ◽  
Vol 9 ◽  
Author(s):  
Poulami Sengupta ◽  
Rituparna Das ◽  
Papu Dhibar ◽  
Piyali Paul ◽  
Samaresh Bhattacharya
Keyword(s):  
Schiff Base ◽  
Density Functional ◽  
Bond Activation ◽  
Density Functional Theory Method ◽  
Organometallic Complexes ◽  
Similar Reaction ◽  
Coupling Reactions ◽  
Schiff Base Ligands ◽  
Positive Side ◽  
Imine Ligands

Reaction of [Rh(PPh3)3Cl] with two Schiff base ligands, viz. N-(2′-hydroxyphenyl)furan-2-aldimine (H2L1) and N-(2′-hydroxyphenyl)thiophene-2-aldimine (H2L2), in refluxing toluene affords organorhodium complexes of type [Rh(PPh3)2(L)Cl] (L = L1 and L2). Similar reaction with [Ir(PPh3)3Cl] yields organoiridium complexes of type [Ir(PPh3)2(L) (H)] (L = L1 and L2). Crystal structures of [Rh(PPh3)2(L1)Cl] and [Ir(PPh3)2(L2) (H)] have been determined, where the imine ligands are found to bind to the metal centers as CNO-donors. Structures of [Rh(PPh3)2(L2)Cl] and [Ir(PPh3)2(L1) (H)] have been optimized by density functional theory method. Formation of the organometallic complexes is believed to proceed via C-H and O-H bond activation of the imine ligands. All four complexes show intense absorptions in the visible and ultraviolet regions. Cyclic voltammetry on the complexes shows an oxidation on the positive side of SCE and a reduction on the negative side. The organoiridium complexes are found to efficiently catalyze Suzuki-type C-C cross coupling reactions.

Synthesis of a series of new platinum organometallic complexes derived from bidentate Schiff-base ligands and their catalytic activity in the hydrosilylation and dehydrosilylation of styrene

2015 ◽  
Vol 44 (26) ◽  
pp. 11919-11928 ◽  
Author(s):  
M. Belhadj Lachachi ◽  
Tayeb Benabdallah ◽  
Pedro M. Aguiar ◽  
M. Hadj Youcef ◽  
Adrian C. Whitwood ◽  
...  
Keyword(s):  
Schiff Base ◽  
Catalytic Activity ◽  
Organometallic Complexes ◽  
Schiff Base Ligands

Substituents on Schiff base ligands impact the rate and selectivity for Pt-catalysed dehydro/hydrosilylation reactions.

scholarly journals Spectral, NLO and antimicrobial studies of Co(II), Ni(II) and Cu(II) complexes of Schiff base ligands of 2-amino-6-nitrobenzothiazole

2019 ◽  
Vol 84 (3) ◽  
pp. 267-275 ◽  
Author(s):  
Chinnaraj Kanagavalli ◽  
Murugesan Sankarganesh ◽  
Raja Dhaveethu ◽  
Manivannan Kalanithi
Keyword(s):  
Schiff Base ◽  
Second Harmonic ◽  
Aromatic Aldehydes ◽  
Antimicrobial Activities ◽  
Spectroscopic Studies ◽  
Molar Conductance ◽  
Spectroscopic Techniques ◽  
Schiff Base Ligands ◽  
Tetrahedral Geometry ◽  
Antimicrobial Studies

Novel series of Co(II), Ni(II) and Cu(II) transition metal complexes were synthesized from the Schiff base ligands HL1?HL4 derived from 2-amino-6- nitrobenzothiazole with various aromatic aldehydes, i.e., 4-methylbenzaldehyde, 4- ethylbenzaldehyde, 2-hydroxybenzaldehyde and 4-hydroxybenzaldehyde, respectively. The ligands HL1?HL4 and their metal (II) complexes were characterized by atomic absorption spectroscopy (AAS), magnetic susceptibility and molar conductance measurements, and UV?Vis, FT-IR and NMR spectroscopic techniques. The spectroscopic studies revealed that the complexes of HL1?HL3 coordinated in an octahedral environment and L4 in square planar/tetrahedral geometry. The ligands HL1?HL4 and their metal(II) complexes were screened for their antimicrobial activities against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Candida albicans. The results suggest that the complexes of HL4 possess greater inhibition activity towards C. albicans. The nonlinear optics (NLO) activities of ligands HL1?HL4 were determined. The obtained results showed that ligands HL1 and HL2 have greater second harmonic generation (SHG) efficiency than HL3and HL4.

scholarly journals Synthesis, Spectral Characterization and Antimicrobial Studies of Co(II) Complexes with Tetradentate Schiff bases Derived from Ortho-Phthalaldehyde

2016 ◽  
Vol 9 (1) ◽  
pp. 1873-1882
Author(s):  
V. Sreenivas ◽  
G. Srikanth ◽  
Ch. Vinutha ◽  
M. Shailaja ◽  
P. Muralidhar Reddy ◽  
...  
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Schiff Bases ◽  
Thermal Conductance ◽  
Antimicrobial Activities ◽  
Aqueous Methanol ◽  
Schiff Base Ligands ◽  
Potential Donor ◽  
Spectral Techniques ◽  
Antimicrobial Studies

A series of cobalt (II) complexes have been synthesized with Schiff bases derived from ortho-phthalaldehyde and various amines in aqueous methanol solution. The newly synthesized Schiff bases and their Co (II) complexes have been characterized  by elemental analysis, magnetic susceptibility, thermal, conductance measurements, mass, IR, electronic, 1H,13C-NMR spectral techniques. These ligands act as tetradentate species and coordinate to the metal center through the different potential donor atoms such as N, O and S. The probable octahedral structures have been assigned to these complexes. All the synthesized Schiff base ligands and Co(II) metal complexes have also been screened for their antimicrobial activities and metal complexes found to be more active than respective Schiff-base ligands.

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