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Chapter 17: Q.22. (page 641)

Question: How many ${}^{13}C$ NMR signals does $C_{60}$ exhibit?

Short Answer

Expert verified

Answer

One signal

Step by step solution

01

C13 NMR spectroscopy

The ${}^{13}C$ NMR spectroscopy is about the carbon atom directly attached to the skeleton and not about the proton attached to it. The ${}^{13}C$ NMR is less sensitive than ${}^{1}H$ NMR.

02

C60 or buckminsterfullerene

$C_{60}$ is also known as buckminsterfullerene. $C_{60}$ is completely conjugated, but it is not planar, and also, it is not as stable as benzene as it has curvatures in it.

03

Finding the number of signals

$C_{60}$ would exhibit only one NMR signal because all the carbon atoms present in $C_{60}$ are identical.

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Most popular questions from this chapter

Draw all possible resonance structures for the antihistamine diphenhydramine, the active ingredient in Benadryl.

Question: Although benzene itself absorbs at 128 ppm in its ${}^{13}C$ NMR spectrum, the carbons of substituted benzenes absorb either upfield or downfield from this value depending on the substituent. Explain the observed values for the carbon ortho to the given substituent in the monosubstituted benzene derivatives X and Y.

Question: Estimate where the protons bonded to the $s p^{2}$ hybridized carbons will absorb in the 1 H NMR spectrum of each compound.

Question: Which of the following heterocycles are aromatic?

Question: Explain the observed rate of reactivity of the following $2 °$ alkyl halides in an $S_{N} 1$ reaction.

See all solutions

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