Question

I am trying to interpret an NMR spectroscopy. I have to identify my unknown compound using the graphs. I just keep getting stuck. Any help would be much appreciated!

Hydrogen= 4 environments

integration (from left to right peak), 2, 3, 3, 3

splitting (left to right) quartet, singlet, singlet, triplet

Hydrogen-1 NNNNN Expt: Sim: 2.097 2.034 1.030 1.025 1.010 015 Block: shift - 092ppm inten. - 0.00078 abs. - 1.634E+05 frequency = sbo.1304664 MHz H. Exp: Vert. Rese Full Zoom Laat Exp Edit Pars Process Apply Ph AutoPhaad Magnitude PP Min. Phaac Integrate Calibrate BL Point Simulate 3.176 3.185 vertical scale 00.03434 ܘܕܐ ܘ22 ° .ܐ ܬܐ 19_ 1ܘܬ1_ 1 .15 146 3.0498 2.40 1.20 1.10

Answer 1

HNMR: As the give spectrum is from 0.9-2.5ppm, I am assuming there are only three peaks. a: 1.015ppm: 3H, T: CH3-CH2- b: 2.1ppm: 3H, CH3-X C: 2.41ppm: 2H, -CH2-CH3 As per the C13 NMR there is a peak at 210, indicates X is CEO of ketone. Thus the compound is ethylmethylketone. 13C NMR: A: 7.7ppm B: 29ppm C: 37ppm D: 209ppm The compound is: butan-2-one

I have compared your spectrum with litratire spectrums of 2-butanone and they are matching.