Question

Unknown #2 CgH180 3.5 3.0 2.5 2.0 1.5 1.0 f1 (ppm) 0 4 3 2 0 f1 (ppm)

Solve and label the HNMR and CNMR

Answer 1

You have not given CNMR!!!

I can solve only 1HNMR.

Peak at 1.8 is smallest peak, take it for 1 proton intensity.

Peak at 0.9 is doublet of intensity of 6 protons and value is less than one that mean we have 2 CH3 group which have only proton in neighbor

Peak at 1 is triplet of intensity of 3 protons so it will be 1 CH3 group and it will have two protins in neighbor.

Peak at 1.25 is multiplet of 2 protons intensity, so it will be 1 CH2 group.

Peak at 1.5 is again multiplet of 2 protons intensity so it will also1 CH2 group.

Peak at 1.8 is for 1 proton so it will be CH group.

Peak at 2.4 is triplet for 2 protons that mean it is CH2 group attached with two protons neighbor. This value also indicate that this CH2 attach with carbonyl carbon.

Peak at 3.8 is doublet of 2 protons intensity that mean it is CH2 group attached with one proton in neighbor. This value also indicate that the CH2 group attached with -O of ester.

Finally structure of compound is