Look back at Memorization Task L3.1 in the previous ChemActivity. Recall that in 13C NMR...

Look back at Memorization Task L3.1 in the previous ChemActivity. Recall that in ¹³C NMR one attached hydrogen could split an NMR peak into a doublet, two attached hydrogens could split it into a triplet, etc.. By counting peaks in a cluster you could determine the number of hydrogens attached to a given carbon. It turns out that in 1H NMR counting peaks in a cluster tells you the number of nearest neighbor hydrogens that are not equivalent. For the spectrum above…

a. (E) How many times was peak cluster a “split/cut” to product the four peaks shown?

b. Identify the three neighboring H’s on the structure which split cluster a into four peaks?

c. (E) How many times was peak cluster b “split/cut” to product the three peaks shown?

d. Identify the two neighboring H’s on the structure which split cluster b into three peaks?

(Reference Memorization Task L3.1)