an-unknown-compound-gives-a-weak-molecular-ion-peak-at-m-z-99-in-the-mass-spectr

Question

An unknown compound gives a weak molecular ion peak at m/z 99 in the mass spectrum. Its NMR spectrum is shown here. The IR spectrum has shown a weak peak at 2255 cm^-1, a strong peak at 1750 cm^-1, and a strong peak at 1205 cm^-1.
Determine its structure and propose a suitable fragmentation for the MS peak at m/z 68.
NMR spectrum showing peaks at 3H and 2H, aiding in the analysis of the unknown compound. NMR spectrum with peaks at 3H and 2H, important for identifying the compound's structure.

Accepted Answer

Chemical structure of the compound showing functional groups and connectivity.

Answer

Chemical structure of the unknown compound with functional groups indicated.

Answer

Chemical structure of the compound with highlighted functional groups for analysis.

Answer

Chemical structure of the compound illustrating functional groups and their arrangement.