| 3 |
1 |
16873 |
| answers |
votes |
views |
We have an olefin, R1-CH=CH-R2 where proton resonances overlap. Is there a way to determine olefin isomer - E (trans) vs...
| 2 |
0 |
5k |
| answers |
votes |
views |
Hello, I've been asked to solve a problem of assigning a positon of deuteration on a molecule, where structure of the de...
| 2 |
0 |
4k |
| answers |
votes |
views |
Hello, I need to help solids lab at our UCI site - they have a custom probe and need to orient it properly in order to e...
| 3 |
1 |
10039 |
| answers |
votes |
views |
Is it possible to use NMR for limit testing of trace impurities in pharmaceutical drug substances? What are the conside...
| 1 |
0 |
5k |
| answers |
votes |
views |
I had two problems like this one recently:
have protein (in solution) of known general structure
resonance assignments...
| 2 |
2 |
5k |
| answers |
votes |
views |
I will really need your help. I am chemist working in the oil buisness and I am interesting is it possible to analyze pr...
| 1 |
0 |
8k |
| answers |
votes |
views |
Hello, I wanted to ask this in a while. Finally a sample arrived that shows this behavior and I made a screenshot (below...
| 1 |
1 |
8k |
| answers |
votes |
views |
Hello there.
After running an 1H-NMR experiment I observed the acetic acid-d4 solvent peaks at 11.54 and 21.16 ppm (off...
| 1 |
1 |
4k |
| answers |
votes |
views |
This cis-cyclohexyl derivative with two big substitutes (A and B) may has two conformational isomers, 1 and 2. How to ...
| 2 |
1 |
23501 |
| answers |
votes |
views |
Hello. What is the best definition to the state of "saturation" in the context of NMR?
No phase coherence in the transv...
