Concept explainers
(a)
Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.
Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.
(b)
Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.
Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.
(c)
Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.
Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.
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Chapter 12C Solutions
Organic Chemistry (6th Edition)
- How many 13C NMR signals does each compound exhibit?arrow_forwardFor each compound, give the number of 1H NMR signals and then determine how many peaks are present for each NMR signal.arrow_forwardFor each attached compound, first label each different type of proton and then rank the protons in order of increasing chemical shift.arrow_forward
- Which compounds give a 1H NMR spectrum with two signals in a ratio of 2:3?arrow_forwardlabel each peak (A, B, C...) and assign each peak on a drawing of the compound (compound shown below) Draw the structure and match each proton peak to a proton in your compound by labeling both the NMR peak and the H atom(s) in the structure with the same letter or by labeling the H atom(s) in the structure with the ppm of the appropriate peak.arrow_forwardQUESTION 3 Using tables 22.3, 22.4, and 22.5, predict the shift for the protons attached to the atom indicated by the arrow. Report your answer in ppm to the tenths' place. Don't include the units in the answer.arrow_forward
- # of NMR peaks?arrow_forwardHow many lines are observed in the 13C NMR spectrum of each attached compound ?arrow_forwarda. Which compound has the stretching vibration for its carbonyl group at the highest frequency: acetyl chloride, methyl acetate, or acetamide?b. Which one has the stretching vibration for its carbonyl group at the lowest frequency?arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage LearningEBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT