Besides, is there a proton in this molecule that might give rise to a
signal with a chemical shift d
= 9.9 ppm ?
|You wouldn't have picked this solution if you
would have tried to draw the structure of this cyclopropane derivative E.
Because then it would have been obvious to you that this isomer would
have to give rise to four proton signals.
Go back to page 48 and give
it another try!