Petrus Siningu Shanika

3 Questions 3 Answers 0 Followers

Questions related from Petrus Siningu Shanika

How do I improve the yield of a carboxylic acid/amine coupling with EDC/DMAP at RT in DCM?

The reaction of the carboxylic acid and EDC alone gives three spots on a TLC. Are the three spots due to N-O displacement? What can I do to produce one spot only? I have thought of carrying out...

23 March 2015 5,593 21 View

Synthesis of chalcone.

I'm trying to synthesis a chalcone from benzaldehyde and acetophenone in the presence of methanolic NaOH (3% w/w) but no precipitate is forming after 16hrs of steering. I have tried dilution with...

11 March 2013 3,057 55 View

Can you recommend a method on how to improve the ICP reading of my lead, zinc and sulphide ore?

The ore is expected to have lead, zinc, sulphides, alumnium, iron and many more oxides.

15 May 2012 1,206 1 View