Force field calculation on the structure of transition metal complexes: Application to schiff-base complexes of Ti(IV)

1996 ◽  
Vol 108 (3) ◽  
pp. 334-334
Author(s):  
R Rajan ◽  
V Subramanian ◽  
Balachandran Unni Nair ◽  
T Ramasami
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Force Field ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Schiff Base Complexes ◽  
Field Calculation ◽  
Force Field Calculation

Synthesis, spectral characterization and some biological studies of transition metal complexes with Schiff base ligand containing N,O and S as donor atoms

2017 ◽  
Vol 13 (9) ◽  
pp. 6513-6519
Author(s):  
Anil Kumar M R ◽  
Shanmukhappa S ◽  
Rangaswamy B E ◽  
Revanasiddappa M
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Schiff Base Ligand ◽  
Dna Cleavage ◽  
Schiff Base Complexes ◽  
Spectral Studies ◽  
Planar Geometry ◽  
Biological Studies

Transition metal complexes of Cu(II), Co(II), Ni(II), Zn(II), Cd(II) and Mn(II) have been synthesized with the Schiff base ligand 5-Sub-N-(2-mercaptophenyl)salicylideneimine. Elemental analysis of these complexes suggest that these metal ions forms complexes of type ML(H2O)stoichiometry for Cu(II), Co(II), Ni(II), Zn(II), Cd(II) and Mn(II). The ligand behaves as tridentate and forms coordinate bonds through O, S and N atoms. Magnetic susceptibility, IR, UV – Visible, Mass and ESR spectral studies suggest that Cu(II), Ni(II) complexes posses square planar geometry, whereas Co(II), Zn(II), Cd(II) and Mn(II) complexes posses tetrahedral geometry. The complexes were tested for their antimicrobial activity against the bacterial strains Staphylococcus aureus and Bacillus subtilis.The Schiff base metal complexes evaluated for their antifungal activity against the fungi A. niger and C. oxysporum. The DNA cleavage studies of Schiff base complexes werestudied using Calf – Thymus DNA by agarose gel electrophoresis method.

An Efficient Catalytic Method for the C-N Acylation of Heterocycles by Schiff Base Co(II), Ni(II), Cu(II) and Zn(II) Transition Metal Complexes..

2020 ◽  
Vol 17 ◽  
Author(s):  
Sujit Hegade ◽  
Gautam Gaikwad ◽  
Yuvraj Jadhav ◽  
Sanjay Chavan ◽  
Ganpatrao Mulik
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Acetyl Chloride ◽  
Structural Type ◽  
High Thermal Stability ◽  
Schiff Base Complexes ◽  
Catalytic Method ◽  
X Ray

: The catalytic activity of Schiff base Co(II), Ni(II), Cu(II) and Zn(II) transition metal complexes were tested for N-Acylation of heterocycles with acetyl chloride. It is observed that all the complexes worked as the efficient catalysts. The Structural type of the complexes were studied by X-ray powder diffractogram (XRD). The mixed ligand complexes with PPh3 ligand show greater activity as compared to Phen complexes and Schiff base complexes. Especially complex [Ni(L)(PPh3)2Cl2] efficiently worked as catalyst because of high thermal stability (TGA-DSC) and large catalytic surface area (BET).

Synthesis, Characterization and in vitro Biological Evaluation of a New Schiff Base Derived from Drug and its Complexes with Transition Metal Ions

2018 ◽  
Vol 69 (7) ◽  
pp. 1678-1681
Author(s):  
Amina Mumtaz ◽  
Tariq Mahmud ◽  
M. R. J. Elsegood ◽  
G. W. Weaver
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Ions ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Free Ligand ◽  
Transition Metal Ions ◽  
Biological Evaluation ◽  
Pyridoxal Hydrochloride

New series of copper (II), cobalt (II), zinc (II), nickel (II), manganese (II), iron (II) complexes of a novel Schiff base were prepared by the condensation of sulphadizine and pyridoxal hydrochloride. The ligand and metal complexes were characterized by utilizing different instrumental procedures like microanalysis, thermogravimetric examination and spectroscopy. The integrated ligand and transition metal complexes were screened against various bacteria and fungus. The studies demonstrated the enhanced activity of metal complexes against reported microbes when compared with free ligand.

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