Question

Below is the HNMR spectrum for dimedone in deuterated DMSO. I need to find the equilibrium constant for the enol/ketone equilibrium. Not sure how to do this since I dont see a prominent signal for the ketone methylene protons? Also the enol should be more prominent in this solvent because of its polarity, but there is no significant OH peak. I am really confused, would appreciate any help. Thanks.

7.69 5.15 2.25 10 12 6 2 2 PPM Nolumes/Lexar/Dimedone/HNMR dimedone in D MSO - 04/10/14 (15:36 )

Answer 1

221 3, 31 , 1.00 \-83 < 3.61 1-0 α, 6 tT H NMR S 9ivan n tto Solvent 9.52 12 621 Er Jo

3 Clt3 I sopuntane C 나. esex _ьох. O.2 o, 23 403 o. So -44310 2 - 8.31429 44390 CV 4 210 J 113ー 8.319x298 つ 144X10