NMR NOESY spectrum - Please help trans-9-(2-phenylethenyl) anthracene

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The forum discussion centers on analyzing the NMR NOESY spectrum of trans-9-(2-phenylethenyl) anthracene. Users seek assistance in labeling the NOESY spectrum and identifying hydrogen interactions due to overlapping peaks in the benzene region. The original poster expresses uncertainty about carbon numbering and the accuracy of their initial labeling attempt. Key questions include the identification of vinyl group resonances and the choice of internal standard used in the NMR analysis.

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  • Understanding of NMR spectroscopy principles
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  • Knowledge of organic chemistry, specifically aromatic compounds
  • Experience with interpreting NMR spectra
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  • Research the principles of NOESY and its applications in structural elucidation
  • Learn how to accurately label NMR peaks and identify functional groups
  • Study the typical chemical shifts for vinyl groups in NMR spectroscopy
  • Explore the use of internal standards in NMR analysis for improved accuracy
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Chemists, particularly those specializing in organic chemistry and spectroscopy, as well as students and researchers analyzing NMR data for molecular structure determination.

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NMR NOESY spectrum -- Please help! "trans-9-(2-phenylethenyl) anthracene"

Here is the NOESY spectrum:
http://img109.imageshack.us/img109/5708/wittiggosy.jpg

Here is the Proton NMR and the structure of the molecule:
http://img40.imageshack.us/img40/1774/wittigprotont.jpg )
trans-9-(2-phenylethenyl) anthracene

I need to label this NOESY and see which hydrogens are interacting with each other.
But with so many peaks all clustered together at the benzene area ... I can't tell them apart!

Also, I may have numbered my carbons wrong.

Please help me out!
 
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FYI
Here is my attempt...
I'm sure it's incorrect :)
http://img32.imageshack.us/img32/5633/noesy.jpg
 
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Did you obtain this spectrum yourself? Why would you label the two resonances at 1.4ppm and 1.6ppm as your two vinyl groups? Where do vinyl groups usually show up?

What did you use as an internal standard?
 

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