# 9.11: Structure Determination (Problems)

P9.1:

1. For each molecule below, draw in all hydrogen atoms, and label them $$H_a$$, $$H_b$$, etc., with chemically equivalent hydrogens having the same label.
2. Predict splitting patterns for all proton signals.

P9.2: For each of the 20 common amino acids, predict the number of signals in the proton-decoupled $$^{13}C-NMR$$ spectrum.

P9.3: Match spectra below to their corresponding structures A-F. Make complete peak assignments for all structures.

(in all $$^1H-NMR$$ data tables in the following problems, peak relative integration values are listed in which the smallest area peak is equal to 1)