Question 14.5: Name the following ethers utilizing IUPAC nomenclature rules......
Name the following ethers utilizing IUPAC nomenclature rules.
a. CH_{3}-CH_{2}-O-CH_{2}-CH_{2}-CH_{3} b. \begin{matrix} CH_{3}-O-\underset{|}{C}H-CH_{2}-CH_{3} \\ CH_{3} \ \ \ \ \end{matrix}
c. 
d. Ethyl methyl ether
a. The base name is propane. An ethoxy group is attached to carbon-1 of the propane chain.
The IUPAC name is 1-ethoxypropane.
b. The base name is butane, as the longest carbon chain contains four carbon atoms.
The IUPAC name is 2-methoxybutane.
c. The base name is cyclohexane. The complete IUPAC name is methoxycyclohexane. No number is needed to locate the methoxy group since all ring carbon atoms are equivalent to each other.
d. The ether structure is CH_{3}—CH_{2}—O—CH_{3}, and the IUPAC name is methoxyethane.
The contrast between IUPAC and common names for ethers is as follows:
IUPAC (one word)
2-methoxybutane
Common (three or two words)
ethyl methyl ether
or
dipropyl ether