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H NMR and C NMR spectra

Each word document contains one problem. I need the structures that go along with each spectrum.

See attached file for full problem description.
1. Near the peaks the numbers are given, which are the integrations, give the number of protons.
Please give a structure for the formula C8H8O, which is consistent with the H NMR spectrum that is below. (I think the answer is 3HCPhCH but want to be sure)
ll
O

2. Near the peaks numbers are given which are the integrations that give the number of protons.
Please give a structure for the formula C10H14O, which is consistent with the H NMR spectrum that is below.

3. For this problem, a compound that has the molecular formula of C5H8O has a strong infrared band near 1700 cm^-1 indicating the presence of a carbonyl group (C=O). Under normal hydrogenation conditions with hydrogen and platinum catalyst, it fails to react. The proton-decoupled C-13 NMR spectrum is shown below. The letters s and t above the peaks indicate singlet and triplet, respectively, when taken with proton coupling. Disregard the solvent peak at 70 ppm. What is the structure for this compound? (I personally think there may be symmetry in the compound, but again am not sure)

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Solution Summary

It finds the structures of the compounds given their H NMR and C NMR spectra. The solution has a '5/5' rating.

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