I have an NMR spectrum. There are 5 peaks.  There is a doublet at 9.6 ppm (integrates to 2H) where aldehydes usually arise, don't know why there is a doublet. There is another doublet at 6.8 ppm, again integrating to 2H.  There is a singlet at 4.5 ppm, integrating to 1H.  There is a quartet at 3.4 ppm integrating to 2H, and lastly there is triplet at 1.2 ppm integrating to 3H.  i recofnize the ethyl group but don't understand the peak at 9.6 unless it is not an aldehyde.

Organic Chemistry
9th Edition
ISBN:9781305080485
Author:John E. McMurry
Publisher:John E. McMurry
Chapter13: Structure Determination: Nuclear Magnetic Resonance Spectroscopy
Section13.8: More Complex Spin–spin Splitting Patterns
Problem 15P: 3-Bromo-1-phenyl-1-propene shows a complex NMR spectrum in which the vinylic proton at C2 is coupled...
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I have an NMR spectrum. There are 5 peaks.  There is a doublet at 9.6 ppm (integrates to 2H) where aldehydes usually arise, don't know why there is a doublet. There is another doublet at 6.8 ppm, again integrating to 2H.  There is a singlet at 4.5 ppm, integrating to 1H.  There is a quartet at 3.4 ppm integrating to 2H, and lastly there is triplet at 1.2 ppm integrating to 3H.  i recofnize the ethyl group but don't understand the peak at 9.6 unless it is not an aldehyde.

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