Tischenko reaction.

Explanation

### Step-by-Step Solution for Tischenko Reaction

**Step 1: Understanding the Reactants**
- The Tischenko reaction involves the reaction of an aldehyde with aluminum alkoxide (Al-O-R, where R is an alkyl group).
- The aldehyde is typically represented as RCHO.

**Step 2: Formation of the Aluminum Complex**
- The oxygen atom of the aldehyde donates its lone pair of electrons to the vacant orbital of the aluminum atom.
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