Concept explainers
Interpretation:
The signal which represents the greatest number of protons in the given NMR spectrum is to be identified. The signal which represents the fewest number of protons is to be identified. Roughly, the number of times more protons contribute to the former signal than to the latter is to be determined.
Concept introduction:
The integral trace for a single peak resembles a stair step and the height of that stair step is proportional to the total area under the peak. The higher an integral trace’s stair step rises for a particular signal, the greater is the number of protons that contribute to that signal. The number of protons that generate that peak is proportional to the area under an absorption peak. A proton signal is represented by the orange peak. The blue stair-step line is the integral trace, which represents the cumulative area under the peak (represented by the shading) going from left to right.
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ORGANIC CHEMISTRY E-BOOK W/SMARTWORK5
- Draw the correct molecule in the box to the right. Label the relevant peaks in the spectra with the proper functional group. If the absence of key peaks led to your choice, indicate which key peaks were absent.arrow_forwardWhich of the highlighted carbon atoms in each attached molecule absorbs farther downfield ?arrow_forwardPlease help me to interpret this spectrum.arrow_forward
- Which of the labeled protons in each pair absorbs farther downeld?arrow_forwardMatch the compound to spectrum by drawing the structure next to correct spectrum. Then explain by describing the total number of signals each structure should have and which carbon would be farthest downfield.arrow_forwardWhich underlined proton (or sets of protons) has the greater chemical shift (that is, the higher frequency signal)?arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage LearningOrganic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning