The reactions of benzene with acetic anhydride in presence of anhydrous `AlCl_3` is called _____ reaction and yields _____

Answer

To solve the question regarding the reaction of benzene with acetic anhydride in the presence of anhydrous AlCl₃, we can break it down into the following steps:

### Step 1: Identify the Reaction Type
The reaction of benzene with acetic anhydride in the presence of anhydrous AlCl₃ is a type of electrophilic aromatic substitution reaction. Specifically, it is known as Friedel-Crafts acylation.

### Step 2: Understand the Reactants
- **Benzene (C₆H₆)**: A simple aromatic hydrocarbon.
- **Acetic Anhydride (C₄H₆O₃)**: A reagent that can introduce an acyl group into the aromatic ring.
- **Anhydrous AlCl₃**: A Lewis acid catalyst that facilitates the reaction by generating an acylium ion from acetic anhydride.

### Step 3: Mechanism Overview
1. The anhydrous AlCl₃ reacts with acetic anhydride to form an acylium ion (CH₃CO⁺).
2. This acylium ion acts as an electrophile and attacks the electron-rich benzene ring.
3. The benzene ring undergoes substitution, leading to the formation of aceto phenol.

### Step 4: Identify the Product
The product formed from this reaction is **acetophenone (C₈H₈O)**, which is also referred to as **aceto phenol**.

### Conclusion
Thus, the reaction of benzene with acetic anhydride in the presence of anhydrous AlCl₃ is called **Friedel-Crafts acylation** and yields **acetophenone (aceto phenol)**.

### Final Answer
The reactions of benzene with acetic anhydride in the presence of anhydrous AlCl₃ is called **Friedel-Crafts acylation** reaction and yields **acetophenone (aceto phenol)**.

---