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Skeletal Form and Bonds in Caffeine

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I need some assistance with a 5 part organic chemistry question involving the skeletal form of Caffeine and the bonds formed in the structure. Please include complete detail for each part. I have part of the problem completed and am looking for confirmation.

a. Draw the structure of Caffeine. Skeletal form only.
b. Locate 2 bonds in the molecule that are obviously polar covalent.
c. What is the hybridization of each O in the molecule?
d. Label each carbon that is not sp^3 -hybridized with its correct hybridization.
e. Are there any sp-C carbons in the molecule? If so, label them.

sp^3 means sp cubed.

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Solution Summary

The solution examines sketetal form and bonds in caffeine. The two bonds in the molecule that are obviously polar covalent are determined.

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b) Red: polar covalent (dipole towards oxygen as they are more ...

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