Syadza Firdausiah

5 Questions 4 Answers 0 Followers

Questions related from Syadza Firdausiah

How to optimize the bromination in aryl group?

I want to brominate three phenyl groups in one molecule by using Fe powder as the catalyst. but I always end up in very small yield. instead, mono and dibromo product were produced. is there any...

29 August 2023 7,664 1 View

What is the best Protecting agent for salicylaldehyde group?

I want to synthesize a compound which has a salicylaldehyde group. How can I protect this group, if I want to use a metal ion as a catalyst in the reaction?

22 October 2022 4,724 4 View

Why does a compound show slightly different retention time in different chromatograms of GC-MS ?

We have performed GC-MS analysis of 2 different samples (essential oil and the fraction). Both revealed the presence of some similar compounds in different compositions. However, some compounds...

08 September 2021 8,034 6 View

Why some thiourea compounds didn't show peak for NH in NMR spectrum?

I am working on the synthesis of thiourea derivatives. In my NMR spectrum, some of the products didn't show peak for NH. Can anyone explain the reason and the reference related to it? Thank you

22 December 2015 7,177 8 View

How to do trifluoromethyl substitution on aromatic ring?

May anyone have a good reference about the aromatic substitution of trifluoromethyl group? which hydrogen atom substituted by -CF3 directly. Thank you in advance.

01 January 1970 7,455 2 View