Question

How many signals does the aldehyde (CH3)3CCH2CHO have in 1H NMR and 13C NMR spectra?
a. five 'H signals and six 13C signals.
b. three 'H signals and four 13C signals.
c. five fH signals and four 13C signals.
d. three 'H signals and six 13C signals.
e. Impossible to know without knowing which isomer was under study.

Answer 1

Answer:

B- three 1H signals and four 13C signals

Explanation:

Protons in similar environment have the same chemical shift; deshielding by electro-negative elements is also a factor that plays in signal emission in spectroscopy.

All C- atoms in methyl-3 group would count as a single peak, as well as the hydrogen atoms present there on the 13C and 1H spectra respectively.

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