Shuer Tan

7 Questions 8 Answers 0 Followers

Questions related from Shuer Tan

Separation of organic compounds using amino- functionalized silica gel spherical 40-75um?

Is it possible to seperate a mixture of two organic compounds (with and without amino group) using amino- functionalized silica gel column chromatography? Which one will I get after the column?

03 August 2018 7,656 4 View

Will the sequence of the products moving down the basic alumina column chromatography (CC) be the same as the sequence shown in the silica-coated TLC?

I am curious about whether the Rf value obtained from the silica-coated TLC can be used as a reference during the purification using basic alumina CC? as the silica gel CC is normally used after...

27 November 2017 636 6 View

What is the value should I subtract from the Eonset of Cyclic Voltametry (CV) to get the HOMO and LUMO value?

HOMO=-e[Eox-onset - X]; LUMO=-e[Ered-onset-X] Did anyone have the list for X values? From several papers, I found that the X values for ferrocence are sometime 3.8, 4.4, 4.3; tetrabutylammonium...

05 November 2017 6,003 1 View

Is there any alternative for thionyl chloride, SOCl2?

I would like to obtain 5,6-dioctyloxybenzo-1,2,5-thiadiazole from 4,5-dioctyloxybenzene-1,2-diaminium chloride. I need SOCl2, which is unable to purchase in my place. Is there any alternative to...

24 February 2017 8,245 12 View

Which is the best reducing agent to convert NO2 group to NH2 group? SnCl2 or Sn?

I would like to convert the nitro group to amino group. Most papers are using Sn/tin powder with the present of ethanol and HCl. There is one paper using SnCl2 instead of Sn in the same...

21 December 2016 1,087 31 View

How to remove the zinc powder added during the reaction? and Which is my product?

The procedure: 2,5-dibromonitrobenzene (16.86 g, 60 mmol) and potassium carbonate anhydrous (82.93 g, 600 mmol) were added in 89.89 mL of dry dimethyl sulfoxide (DMSO) under the nitrogen...

24 November 2016 4,367 8 View

How can I perform one-side bromination?

If I have a dithienyl-benzothiadiazole, and I intend to brominate only one out of two thiophene ring of the structure. Did anyone have any idea/pathway how to do it? Can it be done by controlling...

20 August 2016 2,170 4 View