How many unique proton regions are there in the molecule shown below? H H oy 7 7 5 3 4 6 What will be the peak pattern for proton Hc in the molecule shown below? HA )= C=C CI Ho doublet of doublets triplet singlet doublet The 'H NMR spectrum (left) of an unknown molecule shows only one peak while the 13C NMR (right) for the same molecule shows two peaks. Based solely on the peak patterns, i.e., disregard chemical shifts, what is a possible structure for this molecule? HC & ECHI B. CH, CH, A and B c Br H A and C HC CH A HC CH Band C