Synthesis, chemical structure elucidation, and biological studies on the effect of some vital metal ions on sulfadoxine

Zaky, M.; El‐Sayed, Mohamed Y.; El‐Megharbel, Samy M.; Taleb, Sameh Abo; Refat, Moamen S.

doi:10.1134/s1070363215010314

Cited by 5 publications

(1 citation statement)

References 48 publications

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“…These results can be explained as due to the difference in the electron configuration of the complexes. The new bands appearing in the complexes at δ 3.29–3.65 ppm are due to the water molecules outside the coordination sphere . The signal due to the proton of carboxylic acid appears as a singlet at δ 11.22.…”

Section: Resultsmentioning

confidence: 98%

Spectroscopic, thermal analysis, and nematicidal evaluation of new mixed ligand complexes of bidentate Schiff base and 1,10 phenanthroline with some transition metals

El‐Attar

2018

J Chinese Chemical Soc

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Mononuclear Co(II), Cu(II), Y(III), Zr(IV), La(III), and U(VI) complexes of 2‐[(2‐hydroxybenzylidene)‐amino]‐benzoic acid (H2L) ligand in presence of 1,10‐phenanthroline (Phen) were synthesized and characterized by elemental analysis, spectroscopic techniques (IR, UV–vis, and 1H‐NMR), X‐ray powder diffraction and magnetic measurements. The results prove that H2L acts with the mentioned metal salts as a bidentate ON donor ligand and Phen as an NN donor ligand. The calculated bond length and force constant F(UO) in the uranyl complex are 1.732 Å and 708.90 nM−1, respectively. The electronic spectra and the magnetic susceptibility data support the octahedral geometry for the mononuclear Co(II), Y(III), Zr(IV), La(III), and U(VI) complexes and square‐pyramidal geometry for the Cu(II) complex. Thermogravimetric analysis was performed to determine the thermal stability of the synthesized compounds. The kinetic parameters, that is, the activation energy (E*), pre‐exponential factor (A), entropy of activation (ΔS*), enthalpy of activation (ΔH*) and free energy of activation (ΔG*), of the thermal degradation process were evaluated using Coats–Redfern (C–R) and Horowitz–Metzger (H–M) methods for all the complexes, and the best fit results could be obtained. In the present work, all the synthesized complexes showed nematicidal activity against the root knot nematode (Meloidgyne javanica) by inhibiting egg hatching and causing larval mortality of second‐stage juveniles.

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Section: Resultsmentioning

confidence: 98%