Chapter 14: Q48P (page 527)
How many \(^{{\bf{13}}}{\bf{C}}\) NMR signals do each compound exhibit?
a.
b.
c.
d.
e.
f.
g.
h.
Short Answer
a. Five
b. Three
c. Seven
d. Three
e. Seven
f. Five
g. Four
h. Three
Step by step solution
Step 1: \(^{{\bf{13}}}{\bf{C}}\) NMR spectroscopy
\(^{{\bf{13}}}{\bf{C}}\)Spectroscopy gives the high value of chemical shift signal when the carbon-13 is present in the vicinity of the electron-withdrawing groups.
\(^{{\bf{13}}}{\bf{C}}\)Spectroscopy gives the low value of chemical shift signal when the carbon-13 is present in the vicinity of the electron-rich groups.
Explanation
The different signals of\(^{{\rm{13}}}{\rm{C}}\)spectroscopy are represented as:
a.
It has five signals due to the presence of five different \(^{{\rm{13}}}{\rm{C}}\).
b.
It has three signals due to the presence of three different\(^{{\rm{13}}}{\rm{C}}\).
c.
It has seven signals due to the presence of seven different\(^{{\rm{13}}}{\rm{C}}\).
d.
It has three signals due to the presence of three different \(^{{\rm{13}}}{\rm{C}}\).
e.
It has seven signals due to the presence of seven different \(^{{\rm{13}}}{\rm{C}}\).
f.
It has five signals due to the presence of five different \(^{{\rm{13}}}{\rm{C}}\).
g. It has four signals due to the presence of four different \(^{{\rm{13}}}{\rm{C}}\).
h.
It has three signals due to the presence of three different \(^{{\rm{13}}}{\rm{C}}\).
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