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Questions related from Arnab Biswas
I have attempted the formylation of the above mentioned compound using a very well reported protocol using secondary Butyl Lithium and TMEDA at - 78 degrees Celsius. I have done it quite a few...
09 February 2021 2,967 2 View
I have been trying a Bromination reaction using the reported method of Bromine in Acetic Acid (addition at 0 degrees followed by refluxing). The procedure reports that a white insoluble solid will...
23 June 2020 3,725 9 View
I need to separate peaks of a carboxylic acid having a chiral center within it. I want to first separate the peaks of the 2 enantiomers in the racemic compound first in a suitable chiral column...
29 March 2018 9,921 5 View
I recently tried to isolate a compound which apparently looked like a single spot in the TLC of the reaction mixture but actually was 2 spots when I was doing TLC when running Column...
10 April 2017 5,950 15 View
When I run new samples I use the method of trial and error to get the perfect column to separate the 2 enantiomers of a compound(for racemic case).How does one narrow in on a range of columns...
14 January 2017 776 8 View
I have encountered many organic reactions where I had taken 2 reactants in the molar ratio of 1:2, 1:1.5 etc but after a while TLC examination showed that the limiting reactant(which has been...
08 August 2016 403 13 View
There have been instances where I observed a new spot in TLC plate and have isolated it via Column Chromatography.But it could not be characterized even after obtaining data for 1H, 13C and DEPT 135.
01 August 2016 5,073 10 View
