ahmedabudief

Dr. Ahmed Mohamed Abu-Dief

Assistant Professor - Assistant professor of Inorganic and Physical Chemistry

Faculty of science

Address: Behind hospital of Sohag University - Ali Ebn Abi Taleb Street

299

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Transfer chemical potentials, solubility and reactivity of 6-Nitro-2H-chromen-2-one and 6-Nitro-2H-chromen-2one-3-carboxylate anion
Kinetic results, rate laws and reaction mechanisms were established for the base hydrolysis of 6-nitrocoumarin (NC), 6-nitrocoumarin-3-carboxylic acid (NCC), in aqueous solution, water-methanol and water-acetone mixtures. The kinetics of the base hydrolysis followed a rate law with kobs= k2[OH-] for all coumarin derivatives under study except 6-nitrocoumarin-3-carboxylic acid (NCC) which followed a rate law with kobs= k1+ k2[OH-]. The kinetic ... Read more

Solvent and Temperature effects on Reactivity trends of Base-catalyzed hydrolysis of some Chromen-2-one laser dyes
In the present study, reactivity base-catalyzed hydrolysis of 7-dimethylamino-4-methyl-2H-chromen-2-one (DMAC) and 7-diethylamino-4-methyl-2H-chromen-2-one (DEAC) in binary aqueous-methanol and aqueous-acetone mixtures was examined at 298 K. Kinetic results, rate laws and reaction mechanisms were established. Moreover, the change in the activation energy barrier of the investigated compounds from water to water–methanol and water–acetone mixtures was estimated from the kinetic data. Base-catalyzed hydrolysis ... Read more