Analysis of NMR of 2-(3,4-dihydroxyphenyl)-acetic acid

HAEJI CHOI



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Figure 1.1: HNMR spectrum of 2-(3,4-dihydroxyphenyl)-acetic acid.

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Figure 1.2: It is a peak for CH2 connected to COOH and benzene ring. It deshielded.

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Figure 1.3: This represents a proton connected to benzene. It’s usually 7.2ppm. However, it’s shielded by OH groups that are connected to benzene.[How do you explain the coupling? Which peak is which? JCB]

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Figure 1.4: It is a broad peak for COOH group that is deshielded.


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