Name the pair of alkyl halide and alkoxide for the preparation of ethyl tert-butyl ether.

Explanation

To prepare ethyl tert-butyl ether, we need to identify the appropriate alkyl halide and alkoxide. Here’s a step-by-step solution:

### Step 1: Identify the structure of ethyl tert-butyl ether
Ethyl tert-butyl ether has the structure C2H5-O-C(CH3)3. This indicates that it consists of an ethyl group (C2H5) and a tert-butyl group (C(CH3)3) connected by an ether bond (–O–).

### Step 2: Determine the alkoxide needed
To form the ether, we need an alkoxide that corresponds to the tert-butyl group. The alkoxide ion is formed from the alcohol by deprotonation. Tert-butyl alcohol (C(CH3)3OH) can be deprotonated to form tert-butoxide ion (C(CH3)3O⁻). Thus, the alkoxide we need is tert-butoxide (C(CH3)3O⁻).

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