Illustrate with examples the limitations of Williamson's synthesis for the preparation of certain types of ethers.

Explanation

**Step-by-Step Solution:**

**Step 1: Introduction to Williamson's Synthesis**
Williamson's synthesis is a method for preparing ethers through the reaction of an alkoxide ion with a primary alkyl halide. The alkoxide acts as a nucleophile and attacks the electrophilic carbon in the alkyl halide, leading to the formation of an ether.

**Step 2: Reaction Mechanism**
In Williamson's synthesis, the reaction typically follows an SN2 mechanism, where the nucleophile (alkoxide ion) attacks the primary alkyl halide. This reaction is favored with primary halides because they are less sterically hindered, allowing for a successful nucleophilic attack.

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