khalaf.ali

Khalaf Ali Fayez Abuamra

استاذ - أستاذ متفرغ

كلية العلوم

العنوان: قسم النبات والميكروبيولوجى -كلية العلوم -جامعة سوهاج

2

إعجاب

المنشورات و المؤلفات التي تحتوي علي الكلمة المفتاحية: tetra-dentate


2018-11-21 12:16:31 الكلمات المفتاحية Catalyzed, H2O2, Selectivity, tetra-dentate, epoxidation, Cyclooctene, solvent effect, Temperature, TON, TOF,
High Selectivity on The epoxidation of Cyclooctene Catalyzed by Tri-and Tetra-Dentate Imine Vanadyl Chelates Using H2O2
High yield of VO(II) chelates incorporating new imine ligands were obtained by the condensation reaction between 2-hydroxynaphthaldehyde or 3-ethoxysalicylaldehyde and o-phenylenediamine s in 1:1 molar ratio. All the complexes are non– hygroscopic in nature and stable to the atmosphere. The synthesized ligands and the isolated imine chelates have been characterized various physico-chemical techniques. The results obtained from these studies and ... إقراء المزيد

2018-11-18 11:43:13 الكلمات المفتاحية Temperature, solvent effect, tetra-dentate, Cr (III) complexes, catalytic oxidation, IR, NMR, TGA, aqueous-methanol, Oxidation,
Some New Cr (III)  Mononuclear Complexes encompassing Tri- and Tetra-dentate Imine Ligands: Synthesis, Spectral Characterization and High Selectivity in Catalytic Oxidation of Benzyl alcohol
IN THE PRESENT CONTRIBUTION, SOME NOVEL CR (III) COMPLEXES WERE SYNTHESIZED FROM TRI- AND TETRA-DENTATE IMINE LIGANDS DERIVED FROM 3-ETHOXYSALICYLALDEHYDE OR 2-HYDROXYNAPHTHALDEHYDE WITH 2-AMINOPHENOL OR O-PHENYLENEDIAMINE. ALL THE PREPARED LIGANDS WERE AUTHENTICATED BY 1H, 13C NMR AND IR SPECTRA. INTERACTION OF THE SYNTHESIZED LIGANDS WITH CHROMIUM NITRATE PRODUCED THREE NOVEL CR(III) COMPLEXES. THE STRUCTURE OF THE PREPARED CR (III) COMPLEXES ... إقراء المزيد