Transition metal complexes of novel Schiff base

Zayed, Ehab M.; Hindy, Ahmed M.M.

doi:10.1007/s10973-014-4061-3

Cited by 38 publications

(38 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The compounds were characterized by using different physicochemical techniques. The ligands (1a and 1b) and complexes (2)(3)(4)(5)(6) are stable at room temperature. The degradation of the Schiff base occurs in consecutive reactions where probably the destruction of azomethine double bonds firstly takes place which is confirmed by the TG-FTIR analysis; the ammonia bands appear as the first on the FTIR spectra of evolved gases.…”

Section: Discussionmentioning

confidence: 99%

“…The degradation of the Schiff base occurs in consecutive reactions where probably the destruction of azomethine double bonds firstly takes place which is confirmed by the TG-FTIR analysis; the ammonia bands appear as the first on the FTIR spectra of evolved gases. In the case of complexes (2)(3)(4)(5), the first step is connected with the desolvation process. The TG-FTIR analysis confirms the presence of water (for 2, 3 and 5) or methanol (for 4) molecules in their structures.…”

Section: Discussionmentioning

confidence: 99%

“…1,3-propanediamine (1,3-PDA), 2,4-hydroxybenzophenone (K), acetates: Cu(CH 3 COO) 2 The Schiff base ligand was synthesized (Scheme 1) using a similar method described in previous papers [8,21,22]. Mixtures of 10 mmol of 2,4-dihydroxybenzophenone and 5 mmol of 1,3-propanediamine in 40 mL of methanol or ethanol were refluxed for 2 h. The excess of the solvents (ca.…”

Section: Experimental Materialsmentioning

confidence: 99%

“…It is well known that N and O donors play a key role in the coordination chemistry because they give the possibility of obtaining chelate compounds with interesting structures and properties [1][2][3][4][5][6]. The O,N-donor Schiff bases have often been used as chelating ligands in the field of coordination chemistry because they readily form stable complexes with most of the transition metals [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis, thermal study and some properties of N2O4—donor Schiff base and its Mn(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes

Bartyzel

2016

J Therm Anal Calorim

View full text Add to dashboard Cite

The new hexadentate N 2 O 4 Schiff base ligand from condensation of 2,4-hydroxybenzophenone and 1,3-propanediamine has been prepared in methanol and ethanol solutions. The Schiff base synthesized from EtOH contains half molecule of amine per one molecule of ligand in its structure. The complexes were synthesized from the direct reaction of this ligand and Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) acetates. The Schiff base and its complexes were characterized by elemental analysis, X-ray crystallographic techniques, spectroscopic (UV-Vis, IR) and thermal (TG, TG-FTIR) methods, molar conductance and magnetic measurements. The complexes, except for Ni(II) compound, similar to the Schiff base are amorphous solids. The Ni(II) complex crystallizes in the monoclinic space group P2 1 /c. The N 2 O 2 coordination geometry around nickel(II) is slightly tetrahedrally distorted square planar. Variable temperature magnetic studies of the paramagnetic complexes show the existence of weak antiferromagnetic [for complexes of manganese(III) and cobalt(II)] and weak ferromagnetic [for copper(II)] interactions. The complexes are stable at ambient temperature. After heating at first they lose solvent molecules (water or methanol), and after that organic part undergoes defragmentation and combustion. Based on the obtained data from the TG-FTIR analysis, the main gaseous products resulting from thermal degradation in nitrogen atmosphere are CO 2 , CO, NH 3 , acetic acid, methane, C 6 H 6 , C 6 H 5 CN and C 6 H 5 CH 3 .

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Experimental Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis, thermal study and some properties of N2O4—donor Schiff base and its Mn(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes

Bartyzel

2016

J Therm Anal Calorim

View full text Add to dashboard Cite

show abstract

“…[32][33][34][35] This is due to the coordination of azomethine nitrogen to metal ion. [36,37] Also, a broad ν(H 2 O) band of 5 is found at 3260 cm −1 .…”

Section: Molar Conductance Measurementsmentioning

confidence: 99%

Synthesis of novel macrocyclic Schiff's‐base and its complexes having N₂O₂ group of donor atoms. Characterization and anticancer screening are studied

Zayed

Fahim

et al. 2017

Applied Organom Chemis

Self Cite

View full text Add to dashboard Cite

Novel Schiff base [N′,N′″-(((ethane-1,2-diylbis(oxy))bis(2,1-phenylene))bis(methanylylidene))di(benzohydrazide)] was formed by the condensation reaction of benzohydrazide with 2,2′-(ethane-1,2-diylbis(oxy))dibenzaldehyde. Its reaction with various metal ions was studied and the structures of the new products were characterized using common analytical and spectroscopic methods. All the metal complexes have pronounced anticancer activities. The antimicrobial activities against Gram-negative and Gram-positive bacteria were investigated.

show abstract

Molecular structure, molecular docking, thermal, spectroscopic and biological activity studies of bis‐Schiff base ligand and its metal complexes

Zayed

Hindy

2017

Applied Organom Chemis

Self Cite

View full text Add to dashboard Cite

Mn(II) ions were synthesized from the ligand [4,4′-((((ethane-1,2-diylbis(oxy)) bis(2,1-phenylene))bis(methanylylidene))bis(azanylylidene))diphenol]ethane (H 2 L) derived from the condensation of bisaldehyde and 4-aminophenol. Microanalysis, magnetic susceptibility, infrared, 1 H NMR and mass spectroscopies, molar conductance, X ray powder diffraction and thermal analysis were used to confirm the structure of the synthesized chelates. According to the data obtained, the composition of the 1:1 metal ion-bis-Schiff base ligand was foundand Mn(II), n = 2; Fe(III), n = 3). Magnetic susceptibility measurements and reflectance spectra suggested an octahedral geometry for the complexes. Central metals ions and bis-Schiff base coordinated together via O2 and N2 donor sites which as evident from infrared spectra. The Gaussian09 program was applied to optimize the structural formula for the investigated Schiff base ligand. The energy gaps and other important theoretical parameters were calculated applying the DFT/B3LYP method. Molecular docking using AutoDock tools was utilized to explain the experimental behaviour of the Schiff base ligand towards proteins of Bacillus subtilis (5 h67), Escherichia coli (3 t88), Proteus vulgaris (5i39) and Staphylococcus aureus (3ty7) microorganisms through theoretical calculations. The docked protein receptors were investigated and the energies of hydrogen bonding were calculated. These complexes were then subjected to in vitro antibacterial studies against several organisms, both Gram negative (P. vulgaris and E. coli) and Gram positive (S. pyogones and B. subtilis). The ligand and metal complexes exhibited good microbial activity against the Gram-positive andGram-negative bacteria.KEYWORDS bioinorganic chemistry, bis-Schiff base ligand, in vitro biological activity, IR spectroscopy, metal complexes, thermal analysis

show abstract

Transition metal complexes of novel Schiff base

Cited by 38 publications

References 35 publications

Synthesis, thermal study and some properties of N2O4—donor Schiff base and its Mn(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes

Synthesis, thermal study and some properties of N2O4—donor Schiff base and its Mn(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes

Synthesis of novel macrocyclic Schiff's‐base and its complexes having N₂O₂ group of donor atoms. Characterization and anticancer screening are studied

Molecular structure, molecular docking, thermal, spectroscopic and biological activity studies of bis‐Schiff base ligand and its metal complexes

Contact Info

Product

Resources

About

Transition metal complexes of novel Schiff base

Cited by 38 publications

References 35 publications

Synthesis, thermal study and some properties of N2O4—donor Schiff base and its Mn(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes

Synthesis, thermal study and some properties of N2O4—donor Schiff base and its Mn(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes

Synthesis of novel macrocyclic Schiff's‐base and its complexes having N2O2 group of donor atoms. Characterization and anticancer screening are studied

Molecular structure, molecular docking, thermal, spectroscopic and biological activity studies of bis‐Schiff base ligand and its metal complexes

Contact Info

Product

Resources

About

Synthesis of novel macrocyclic Schiff's‐base and its complexes having N₂O₂ group of donor atoms. Characterization and anticancer screening are studied