please explain will it have 5 signals or3 signals PROBLEM-SOLVING STRATEGY Determining the Number of Signals in an H NMR Spectrum Uow many signals WOuld yOu CApcot o Sce ln the HNMR spectrum of ethylbenzene? CH,CH2 To determine the number of signaiS you would expect to see in the spectrum, replace each hydrogen in turn by another atom (here we use Br) and name the resulting compound. The number of different names corresponds to the number of signals in the 'H NMR spectrum. We get five different names for the bromosubstituted ethylbenzenes, so we expect to see five signals in the 'H NMR spectrum of ethylbenzene. Br CH CH2 CHCH Br BrCH,CH 1-bromo-1-phenylethane 1-bromo-2-ethylbenzene 1-bromo-2-phenylethane Br CH,CH CH,CH -Br CH,CH CH CH2 Br Br 1-bromo-2-ethylbenzene 1-bromo-3-ethylbenzene 1-brom0-4-ethylbenzene 1-bromo-3-ethylbenzene NOW use the strategy you have just learned to solve Problems 3 and 4.