scholarly journals Synthesis and Characterization of New Bidentate Schiff Base Ligand Type (NO) Donor Atoms Derived from Isatin and 3-Amino Benzoic Acid and Its Complexes with Co(II), Cu(II), Cd(II) and Hg(II) Ions

2017 ◽  
Vol 30 (3) ◽  
pp. 158
Author(s):  
Heam Hadi Alkam
Keyword(s):  
Schiff Base ◽  
Benzoic Acid ◽  
1H Nmr ◽  
Schiff Base Ligand ◽  
Chloride Content ◽  
No Donor ◽  
Imine Group ◽  
Bidentate Schiff Base Ligand ◽  
Ft Ir ◽  
Amino Benzoic Acid

New bidentate Schiff base ligand (L) namely [(Z)-3-(2-oxoindolin-3ylildeneamino)benzoic acid] type (NO) was prepared via condensation of  isatin and 3-amino benzoic acid in ethanol as a solvent in existence of drops of (glac. CH3COOH). The new ligand (L) was characterized base on elemental microanalysis, FT-IR, UV-Vis, 1H-NMR spectra along with melting point. Ligand complexes in general formula [M(L)2Cl2]. H2O, where: MII = Co, Cu, Cd, and Hg; L= C15H10 N2O3 were synthesized and identified by FT-IR, UV-Vis, 1H-NMR (for Cd complex only) spectra, atomic absorption, chloride content along with molar conductivity and magnetic susceptibility. It was found that the ligand behaves as bidentate on complexation via (N) atom of imine group and (O) atom of carbonyl group of five member ring. The electronic spectral data and µeff values (Co, Cu) of the complexes exhibited octahedral geometry around CoII, CuII, CdII, HgII metal ions. The results of antibacterial activity showed that only Hg(II) complex has high activity (35 mm) for staphylococcus aureas.

scholarly journals Synthesis and Characterization of some New 1,3,4-Oxadiazole derivatives based on 4-amino benzoic acid

2016 ◽  
Vol 13 (4) ◽  
pp. 762-769
Author(s):  
Baghdad Science Journal
Keyword(s):  
Schiff Base ◽  
Benzoic Acid ◽  
Spectral Data ◽  
1H Nmr ◽  
Synthesis And Characterization ◽  
Oxadiazole Derivatives ◽  
Ft Ir ◽  
Amino Benzoic Acid

Various of 2,5- disubstituted 1,3,4-oxadiazole (Schiff base, ?- lactam and azo) were synthesized from 2,5-di (4,4?-amino-1,3,4-oxadiazole which usequently synth-esized from mixture of 4- amino benzoic acid and hydrazine arch of polyphosphorus acid. The synthesized compounds were cherecterized by using some spectral data (UV, FT-IR , and 1H-NMR)

scholarly journals Synthesis, Characterization of some New 1, 3, 4-Oxadiazole derivatives based on 4- amino benzoic acid

2016 ◽  
Vol 13 (2) ◽  
pp. 289-297
Author(s):  
Baghdad Science Journal
Keyword(s):  
Schiff Base ◽  
Benzoic Acid ◽  
Spectral Data ◽  
1H Nmr ◽  
Oxadiazole Derivatives ◽  
Ft Ir ◽  
Amino Benzoic Acid

In this research various of 2,5-disubstituted 1,3,4-oxadiazole (Schiff base, oxo-thiazolidine , and other compounds) were synthesized from 2,5-di(4,4?- amino-1,3,4-oxadiazole ) which use quently synthesized from mixture of 4-amino benzoic acid and hydrazine in the presence of polyphosphorus acid. The synthesized compounds were characterized by using some Spectral data (UV, FT-IR, and 1H-NMR).

scholarly journals (E)-4-[(4-Diethylamino-2-hydroxybenzylidene)amino]benzoic acid

2012 ◽  
Vol 68 (4) ◽  
pp. o1036-o1036 ◽  
Author(s):  
Hadi Kargar ◽  
Zahra Sharafi ◽  
Reza Kia ◽  
Muhammad Nawaz Tahir
Keyword(s):  
Hydrogen Bond ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Benzoic Acid ◽  
Schiff Base Ligand ◽  
Site Occupancy ◽  
Compound C ◽  
Benzene Rings ◽  
Ring Motif ◽  
Amino Benzoic Acid

In the title compound, C18H20N2O3, a potential bidentateN,O-donor Schiff base ligand, the benzene rings are inclined at an angle of 12.25 (19)°. The molecule has anEconformation about the C=N bond. One of the ethyl groups is disordered over two positions, with a refined site-occupancy ratio of 0.55 (1):0.45 (1). An intramolecular O—H...N hydrogen bond makes anS(6) ring motif. In the crystal, pairs of O—H...O hydrogen bonds link molecules, forming inversion dimers withR22(8) ring motifs.

scholarly journals (E)-3-[(3-Ethoxy-2-hydroxybenzylidene)amino]benzoic acid

2012 ◽  
Vol 68 (4) ◽  
pp. o1035-o1035
Author(s):  
Hadi Kargar ◽  
Zahra Sharafi ◽  
Reza Kia ◽  
Muhammad Nawaz Tahir
Keyword(s):  
Hydrogen Bond ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Benzoic Acid ◽  
Schiff Base Ligand ◽  
Title Compound ◽  
Compound C ◽  
Benzene Rings ◽  
Ring Motif ◽  
Amino Benzoic Acid

In the title compound, C16H15NO4, a potential bidentateN,O-donor Schiff base ligand, the benzene rings are inclined to one another by 4.24 (12)°. The molecule has anEconformation about the C=N bond. An intramolecular O—H...N hydrogen bond makes anS(6) ring motif. In the crystal, pairs of O—H...O hydrogen bonds link the molecules, forming inversion dimers withR22(8) ring motifs. These dimers are further connected by C—H...O interactions, forming a sheet in (104). There is also a C—H...π interaction present involving neighbouring molecules.

scholarly journals Solvent-dependent synthesis and mono-hydrolysis of di-Schiff base of (+/-)trans-1,2-cyclohexanediamine and 2-pyridinecarboxaldehyde in Cu(II), Co(II) and Zn(II) complexes

2012 ◽  
Vol 77 (11) ◽  
pp. 1589-1597 ◽  
Author(s):  
Maryam Lashanizadegan ◽  
Marzieh Sarkheil
Keyword(s):  
Schiff Base ◽  
Metal Ions ◽  
1H Nmr ◽  
Elemental Analysis ◽  
Schiff Base Ligand ◽  
Nmr Spectra ◽  
Tridentate Ligand ◽  
Partial Hydrolysis ◽  
Ft Ir ◽  
Hydrolysis Of

The Schiff base ligand trans-N,N?-bis[2-pyridinecarboxylidene] cyclohexane-1,2-diamine (L) was synthesized. This ligand when stirred with 1 equiv of MCl2.xH2O (M = Cu, Co, Zn) in ethanol, undergoes partial hydrolysis of the imino bond and the result tridentate ligand (L') and immediately forms the complexes with N3 coordination sphere. The reactions of L with MCl2.xH2O (M = Cu, Co, Zn) in THF give complexes [ML]Cl2. The ligand (L), complexes [M(L')Cl]Cl and [ML]Cl2 were characterized by elemental analysis, UV-Vis, FT-IR, 1H NMR, GC/MS and luminescence properties. The 1H NMR spectra of the ligand and its diamagnetic complexes were recorded in CDCl3 and DMSO solvents, respectively. Obtained data confirm that the donor atoms N in ligand coordinated to the metal ions. The luminescence studies show ligands and their complexes display intraligand (?- ?

Cyclometalated Pt(ii) complexes with a bidentate Schiff-base ligand displaying unexpected cis/trans isomerism: synthesis, structures and electronic properties

2017 ◽  
Vol 46 (37) ◽  
pp. 12500-12506 ◽  
Author(s):  
A. Poma ◽  
A. Forni ◽  
C. Baldoli ◽  
P. R. Mussini ◽  
A. Bossi
Keyword(s):  
Schiff Base ◽  
Electronic Properties ◽  
Computational Methods ◽  
Schiff Base Ligand ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bidentate Schiff Base Ligand

Unexpected cis/trans isomerism in a bis-cyclometalated Pt(ii) complex is investigated by NMR, X-ray diffraction, optical, electrochemical and computational methods and rationalized.

Synthesis, Structure and Fluorescence Properties of a Trinuclear Zn(II) Complex with N,N,O-donor Schiff Base Ligands and Bridging Acetates

2009 ◽  
Vol 64 (4) ◽  
pp. 403-408 ◽  
Author(s):  
Shyamapada Shit ◽  
Joy Chakraborty ◽  
Brajagopal Samanta ◽  
Georgina M. Rosair ◽  
Samiran Mitra
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Fluorescence Properties ◽  
Schiff Base Ligands ◽  
Thermal Methods ◽  
Metal Centers ◽  
X Ray ◽  
Octahedral Environment ◽  
Distorted Octahedral ◽  
Ft Ir

A new centrosymmetric trinuclear Zn(II) complex [Zn3L2(CH3COO)4] (1) has been synthesized by the reaction of Zn(CH3COO)2 · 2H2O with a tridentate N,N,O-donor Schiff base ligand HL [C5H4NC(CH3)=NC6H4(OH)] and systematically characterized by elemental analysis, FT-IR, UV/Vis and thermal methods. Single crystal X-ray structure analysis reveals that three Zn(II) centers are in two different coordination environments. Two terminal Zn(II) centers adopt a distorted squarepyramidal geometry leaving the central Zn(II) in a distorted octahedral environment. Two adjacent metal centers are connected through single μ2-phenolato as well as double μ-acetato-O,O´ syn-syn bridges. Fluorescence properties of the complex as compared to the ligand indicate that the former can serve as a potential photoactive material.

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