Step 1: Understanding the Concept:
In IUPAC nomenclature for ethers, the smaller alkyl group is treated as an "alkoxy" substituent on the longer parent alkane chain.
Step 2: Formula Application:
Methyl isopropyl ether consists of a methyl group ($CH_3-$) and an isopropyl group ($-CH(CH_3)_2$) connected by an oxygen atom.
Step 3: Explanation:
The parent chain is propane (3 carbons). The methoxy group ($-OCH_3$) is attached to the second carbon of the propane chain. Therefore, the name is 2-methoxypropane.
Step 4: Final Answer:
The IUPAC name is 2-methoxypropane.