`C-O-C` bond angle in diethyl ether is about-

Options

A. `180^(@)`
B. `110^(@)`
C. `150^(@)`
D. `90^(@)`

Answer

To determine the C-O-C bond angle in diethyl ether, we can follow these steps:

### Step 1: Understand the Structure of Diethyl Ether
Diethyl ether (C2H5)2O has the following structure:
- It consists of an oxygen atom bonded to two ethyl groups (C2H5).
- The molecular formula can be represented as CH3-CH2-O-CH2-CH3.

### Step 2: Identify the Hybridization of the Oxygen Atom
- The oxygen atom in diethyl ether is bonded to two carbon atoms and has two lone pairs of electrons.
- This results in a tetrahedral arrangement around the oxygen atom due to sp³ hybridization.

### Step 3: Determine the Expected Bond Angle
- In a perfect tetrahedral structure, the bond angles are approximately 109.5°.
- However, the presence of lone pairs can affect the bond angles.

### Step 4: Analyze the Effect of Lone Pairs
- The two lone pairs on the oxygen atom create repulsion, which can push the bonded atoms closer together.
- This results in a slight increase in the bond angle from the ideal tetrahedral angle.

### Step 5: Conclude the Bond Angle
- In diethyl ether, the C-O-C bond angle is observed to be about 110° due to the repulsion between the lone pairs and the bonded pairs.
- Therefore, the answer to the question is that the C-O-C bond angle in diethyl ether is approximately 110°.

### Final Answer:
The C-O-C bond angle in diethyl ether is about **110°**.

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