12a. C5H9Br The peaks on the left are further downfield that in the previous problem, indicating the influence of the bromine. The peak furthest to the left is not a triplet, and not a quartet, but 4 relatively even lines, a doublet f dnithate This indicates two coupling constants that are different in magnitude, here 7 and 3Hz. Cf 12b \& c. 12b. C5H9Br This one is very similar to the previous one. The peaks downfield have the same patterns, but are leaning towards each other because they have similar chemical shifts and are coupled to each other. (See lecture examples.) The peak furthest to the left again has two coupling constants, here 6 and 15Hz. Cf 12a&c