Chemical Forums
Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: gregpawin on April 12, 2004, 03:46:41 AM
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Hehehe... I'll start a new game here... using spectral data we're going to have a contest of who can find the structure, if you win, you'll be our organic guru of the day:
Problem 1:
C12H20O4
Mass Spec:
(http://www.gregpawin.chemicalforums.com/C12H20O4mass.gif)
Carbon 13 NMR:
(http://www.gregpawin.chemicalforums.com/C12H20O4CNMR.gif)
ppm Intensity
171.98 265
61.07 1000
54.97 245
31.38 840
25.25 462
22.76 890
14.09 946
Hydrogen NMR:
(http://www.gregpawin.chemicalforums.com/C12H20O4HNMR.gif)
And since they don't give integration data:
ppm Number of Hydrogens Type of Peak
4.18 4 quartet
1.976 4 triplet
1.524 4 quintet
1.436 2 triplet
1.246 6 triplet
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This is a great idea. What's the source for all the spectra?
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Well, it was from the NMR spectra database in the links section... but maybe its good that its gone because people could cheat that way and just plug in the peaks...
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since no one got it... I'll just post it. Probably too hard and without DEPT or other kinds of carbon NMR.
(http://www.gregpawin.chemicalforums.com/11cyclohexanedicarboxylicaciddiethyester.gif)
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Compound Name: 1,1cyclohexanedicarboxylic acid diethyl ester (diethyl 1,1-cyclohexanedicarboxylate).
CAS Registry No: 1139-13-5