Question

I am trying to identify an unknown but have had some trouble.

The IR shows strong sharp peaks at approximately 2965 cm^-1 and 1746 cm^-1.

The m/z seems to be 86.

Proton NMR shows a quartet at 2.5 ppm, and a triplet at 1.0 ppm.

C13 NMR shows peaks at 11, 46, and 76 ppm.

Is my m/z correct based on the MS?

I suspect the unknown might be cyclopentanone or pentan-3-one. Any hits would be useful. Thank you.

4000 200D 1500 500 波数/cm-1 607 6D 506 81 3464 411396 36 2965 121381 13 2896 41 1367 19944 70 2θ7θ 3211239 2130 86I181 6D L746 4108 74 L472 29 1039 11 39 68 991 62 966 70 926 68 906 64 824 74

Answer 1

Answer: