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Chapter 17: Q.22. (page 641)

Question: How many C13 NMR signals does C60 exhibit?

Short Answer

Expert verified

Answer

One signal

Step by step solution

01

C13 NMR spectroscopy

The C13NMR spectroscopy is about the carbon atom directly attached to the skeleton and not about the proton attached to it. The C13NMR is less sensitive than H1NMR.

02

C60 or buckminsterfullerene

C60is also known as buckminsterfullerene.C60 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

C60 would exhibit only one NMR signal because all the carbon atoms present in C60 are identical.

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Most popular questions from this chapter

Question: Classify each compound as aromatic, antiaromatic, or not aromatic.

Question: Explain why compound A is much more stable than compound B.

Question: Label each compound as aromatic, antiaromatic, or not aromatic. Assume all completely conjugated rings are planar.

Question: Explain why A is aromatic but B is not aromatic.

Question: Rizatriptan (trade name Maxalt) is a prescription drug used for the treatment of migraines.

a. How many aromatic rings does rizatriptan contain?

b. Determine the hybridization of each N atom.

c. In what type of orbital does the lone pair on each N reside?

d. Draw all the resonance structures for rizatriptan that contain only neutral atoms.

e. Draw all reasonable resonance structures for the five-membered ring that contains three N atoms.
See all solutions

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