Krang Lee's user avatar
Krang Lee's user avatar
Krang Lee's user avatar
Krang Lee
  • Member for 3 years, 10 months
  • Last seen this week
  • South Korea
7 votes
3 answers
480 views

Choosing reaction stoichiometry in organic synthesis

6 votes
0 answers
191 views

Why is the base peak of my MS spectra of 2,3,5-tribromothiophene at m/z=382?

4 votes
1 answer
238 views

Relative abundance of mixture in mass spectra

4 votes
2 answers
120 views

Should I do solvent extraction for Buchwald–Hartwig amination?

4 votes
1 answer
89 views

Polymer purification by reprecipitation troubleshooting

3 votes
0 answers
67 views

Purification of Buchwald-Hartwig amination

3 votes
0 answers
946 views

How can I store reagent under inert gas?

3 votes
0 answers
55 views

Degradation of Pd catalyst in Buchwald-Hartwig amination

3 votes
2 answers
642 views

What is the difference of spectra of EI-MS and ESI-MS/MS?

3 votes
1 answer
176 views

Interpretation of permanganate-stained TLC spots

3 votes
0 answers
73 views

TLC monitoring of Buchwald-Hartwig coupling reaction using ninhydrin stain

2 votes
0 answers
106 views

Using neutral or basic alumina in column chromatography for purification of amines

2 votes
0 answers
46 views

Buchwald-Hartwig coupling troubleshooting

2 votes
0 answers
60 views

Evaporation of sample solvent and redissolving

2 votes
0 answers
101 views

Bromine isotope peaks were observed in EI-MS, but not in ESI-MS

2 votes
0 answers
54 views

Dissolving NaOtBu in toluene

2 votes
0 answers
42 views

Solvent choice in imine formation from quercetin and poly(allylamine)

2 votes
2 answers
218 views

α-cleavage of 1-pentene in EI-MS

2 votes
0 answers
94 views

Analysis of reaction mixture by TLC and finding column chromatography condition

2 votes
1 answer
94 views

Is it possible to filter Stille catalysts using syringe filter?

2 votes
1 answer
134 views

How can I filtrate Pd2(dba)3 and P(o-tol)3? (Celite filtration failed)

2 votes
1 answer
138 views

Does ninhydrin staining detect triethylamine?

2 votes
0 answers
36 views

Mixture is eluted too early from alumina in flash column chromatography

1 vote
0 answers
33 views

Does the metal complexing of crown ether influence its reactivity?

1 vote
0 answers
59 views

Problem about TLC solvent and staining

1 vote
0 answers
318 views

Leakage during Celite filtration

1 vote
0 answers
70 views

Is it possible to run column chromatography in reversed phase?

1 vote
1 answer
513 views

questions about the synthesis of iodobenzene from aniline

1 vote
1 answer
78 views

Water vapor permeation to the reaction flask

1 vote
0 answers
42 views

Mass spectra interpretation for monitoring Buchwald–Hartwig coupling