Interpretation:
The structure for an alcohol with molecular formula
Concept introduction:
Few elements such as
There are four features of NMR spectra that help in predicting the structure:
The number of signals in the spectra tells us the number of different types of protons present in the molecule.
Chemical shift is the measurement on
Area under the peaks tells us the number of similar protons.
The splitting pattern of a signal tells us about the number of protons present on adjacent carbon.
NMR signal of a particular proton generally splits into N + 1 peaks, where N is the number of hydrogen atoms on the adjacent atoms. If there is no hydrogen present on the adjacent atom, then resonance will be singlet. If there is only one hydrogen present on adjacent carbon, then signal will split into two peaks or have doublets. Two hydrogens on adjacent atoms split the signal into three peaks, a triplet, and so on.
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