1. There are four structural isomers of C4H9Cl. Two of the four can be quickly distinguished using 13C NMR, whereas the other two would produce the same number of 13C NMR signals.
a. Draw the isomer that would show three distinct signals in the 13C NMR.
b. Draw the two isomers that would show four distinct signals in the 13C NMR.
c. Draw the isomer that would show two distinct signals in the 13C NMR.
