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Q5.

Expert-verified
Organic Chemistry
Found in: Page 337

Short Answer

Question: Name each epoxide.

a.

b.

c.

Answer

a. methyloxirane , 1,2-epoxypropane

b. 1,2-epoxy-1-methylcyclohexane

c. cis-2-methyl-3-propyloxirane, cis-2,3-epoxyhexane

See the step by step solution

Step by Step Solution

Step-by-Step Solution Step 1: The nomenclature of epoxide

  • Epoxides are named as derivatives of oxirane, the simplest epoxide.

  • Epoxides can be named by considering the oxygen as a substituent called an epoxy group, bonded to a hydrocarbon chain or ring.

  • Epoxides can be named alkene oxides by mentally replacing the epoxide oxygen with a double bond. Name the alkene and add the word oxide.

Step 2: Explanation

a. The given compound can be named in two ways are as follows:

Methyloxirane- methyl is for the methyl substituent, and the oxirane comes out for the three-membered cyclic ring.

1,2-epoxypropane-The epoxy comes for the two-ethyl group bonded with oxygen, and propane comes for three carbon including methyl group.

b. The given compound can be named as follows:

1,2-epoxy-1-methylcyclohexane-methyl is for the methyl substituent, the epoxy comes for the two-ethyl group bonded with oxygen, and the cyclohexane comes for the six-carbon cyclic ring.

c. The given compound can be named in two ways are as follows:

cis-2-methyl-3-propyloxirane- The methyl and propyl are the substituents located at the second and third positions, and the oxirane comes out for the three-membered cyclic ring.

The cis comes with the same stereochemistry for the substituents.

cis-2,3-epoxyhexane-The epoxy comes for the two-ethyl group bonded with oxygen, and hexane comes for six carbon atoms, including the methyl group and propyl substituents.

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