Give one example of an ether which cannot be decomposed by HI.

Explanation

To solve the question of providing an example of an ether that cannot be decomposed by hydrogen iodide (HI), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Ethers**: Ethers are organic compounds characterized by an oxygen atom connected to two alkyl or aryl groups. The general structure of an ether is R-O-R', where R and R' can be either alkyl or aryl groups.

2. **Decomposition of Ethers by HI**: Ethers can be decomposed by hydrogen iodide, where the ether reacts with HI to yield alcohol and alkyl iodide. However, this reaction typically occurs with simple ethers.

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