Concept explainers
(a)
Interpretation:
The structure of phenylalanine as it exists in
Concept introduction:
The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to
(b)
Interpretation:
The peaks in the spectrum are to be assigned to the protons in the structure.
Concept introduction:
The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between
(c)
Interpretation:
The reason for the absence of
Concept introduction:
The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between
(d)
Interpretation:
The relationship between the two protons that generate nearly mirror-image multiplets at
Concept introduction:
The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighbouring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between
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Organic Chemistry (9th Edition)
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