The IR and H1 NMR are given for a compound with the molecular formula C11H15NO (

Question

The IR and H1 NMR are given for a compound with the molecular formula C11H15NO (the pictures should be attached).

a: the signals at 7.3 ppm and 1.8 ppm are not part of the compound. What type of impurity can cause these peaks?

b: for the H1 NMR provide a summary of the peaks in the spectrum. What are the most resonable guesses for each of the signals in this spectrum?

Peak 1: 9.75 ppm. singlet. 15mm (1H)

Peak 2: 7.75 ppm. doublet. 30mm (2H)

Peak 3: 7.32 ppm. singlet. 2.5mm (impurity)

Peak 4: 6.75 ppm. doublet. 30mm (2H)

Peak 5: 3.35-3.55 ppm. multiplet (quartet?). 65mm (4H)

Peak 6: 1.74 ppm. singlet. 2.5mm  (impurity)

Peak 7: 1.15-1.35 ppm. triplet. 95mm (6H)

c: Determine the structure of this molecule. (check the chemical shifts, they should be close to the values found in the spectrum ) briefly explain how you arrived at the structure.

Explanation / Answer

The IR and H1 NMR are given for a compound with the molecular formula C11H15NO (

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