An unknown compound gives a mass spectrum with a weak molecular ion at m/z 113 and a prominent ion...

Question

An unknown compound gives a mass spectrum with a weak molecular ion at m/z 113 and a prominent ion at m/z 68. Its NMR and IR spectra are shown here. Determine the structure, and show how it is consistent with the observed absorptions. Propose a favorable fragmentation to explain xplain the prominent MS peak at m/z 68.

Robert · Accepted Answer

Answer :- The sructure of the compound is given as folloews:-
 CH
3
 CH
2
 C C CH
2
 COOH
As according to mass spectrum the fragments will be like this because
113-68 = 45 m/z which is for the -COOH group.

An unknown compound gives a mass spectrum with a weak molecular ion at m/z 113 and a prominent ion at m/z 68. Its NMR and IR spectra are shown here. Determine the structure, and show how it is...

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