Here are the essential concepts you must grasp in order to answer the question correctly.
Carbon Environment in NMR
In 13C NMR spectroscopy, each unique carbon environment in a molecule produces a distinct signal. This means that carbons in different chemical environments, such as those bonded to different functional groups or in different hybridization states, will resonate at different frequencies, leading to separate peaks in the spectrum.
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Symmetry and Signal Count
The symmetry of a molecule can significantly affect the number of signals observed in its NMR spectrum. If a molecule has symmetrical features, some carbon environments may be equivalent, resulting in fewer signals than the total number of carbons. Identifying symmetry elements helps in predicting the number of distinct signals.
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Integration of NMR Signals
In NMR spectroscopy, the area under each signal (integration) correlates with the number of nuclei contributing to that signal. While this is more commonly discussed in 1H NMR, understanding integration in 13C NMR can help in quantifying the relative number of different carbon environments, aiding in the interpretation of the spectrum.
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