Amal Hassan Tolba

5 Questions 9 Answers 0 Followers

Questions related from Amal Hassan Tolba

What is the best technique for amide purification?

I need to know what is the best technique for amide purification because when I use column chromatography, I lose a large amount of the amide product.

02 November 2020 341 13 View

Is there any method to do simulation of the resonance structures of an organic compound?

I am preparing a supramolecular organic photocatalyst but it is little bit tricky to draw the resonance structures of such compound because of the presence of many electron donating groups...

30 December 2019 5,738 3 View

Which ion exchanger would be better in the synthesis of polymer-supported photocatalyst, Amberlite resin or Dowex resin?

I want to know, if I prepared polymer-supported photocatalyst, Amberlite resin or Dowex resin would be better (This would be according to the chemical structure, pore size, surface area or the...

11 December 2018 5,101 3 View

How can the presence of substituents in the phenyl rings of poly(arylidene-ether) affect on crystallinity and solubility of these polymers?

I prepared main chain poly(arylidene-ether)s containing tert-butylcyclohexanone in the polymer backbone using bulky substituents in the phenyl rings instead of hydrogen atoms. I want to know, how...

14 October 2016 8,277 1 View

Can UV absorption band of methoxy group appear before C=C group?

I prepared a polymer containing benzene ring, C=C group and methoxy group in its structure, when I measured UV absorption of this polymer in chloroform, I obtained three bands. I can not explain...

02 June 2016 6,092 3 View