GBALA Posted October 21, 2012 Share Posted October 21, 2012 I isolated a compound from plant source and it is only soluble in hot chloroform with the melting point of 60 degree. I have taken H-NMR and it clearly shows the characteristic peak of -CH2 group @ 1.2 ppm with the integration value of 69 which suggests that it could be fattyacid or hydrocarbon. But C-13 NMR gave relatively less number of peaks that is only 8 peaks in the spectrum. How can I correlate with 8 carbons and more than 70 protons. Please help me through. Link to comment Share on other sites More sharing options...
crimsonpetal Posted October 22, 2012 Share Posted October 22, 2012 May be it is a highly symmetrical structure, with one quaternary carbon at the center and four branches each have 8 -CH2 and 1 -COOH. Just guess~~ Link to comment Share on other sites More sharing options...
GBALA Posted October 22, 2012 Author Share Posted October 22, 2012 good guess sir. But there is no possibility of COOH group. If it is highly symmetrical how can i decode the spectrum to find out the structure? Link to comment Share on other sites More sharing options...
hypervalent_iodine Posted October 22, 2012 Share Posted October 22, 2012 By doing other NMR experiments. Try doing some COSY or HSCQ/HMBC. It would also be worth getting some mass spec data. Link to comment Share on other sites More sharing options...
GBALA Posted October 22, 2012 Author Share Posted October 22, 2012 Yes sir i am about to carry out some mass spectra. The boiling point of this compound is 62 degree. Can it be worth if i go for GC-MS? Link to comment Share on other sites More sharing options...
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