Concept explainers
(a)
Interpretation: The highlighted carbon atom of the given compound that absorbs farther downfield is to be identified.
Concept introduction: Depending upon the electron density or the concentration of electron around carbon, the chemical shift values of carbon 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 highlighted carbon atom of the given compound that absorbs farther downfield is to be identified.
Concept introduction: Depending upon the electron density or the concentration of electron around carbon, the chemical shift values of carbon 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 highlighted carbon atom of the given compound that absorbs farther downfield is to be identified.
Concept introduction: Depending upon the electron density or the concentration of electron around carbon, the chemical shift values of carbon 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.
(d)
Interpretation: The highlighted carbon atom of the given compound that absorbs farther downfield is to be identified.
Concept introduction: Depending upon the electron density or the concentration of electron around carbon, the chemical shift values of carbon 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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