The length of C-C bonds in benzene is

Options

A. `1.22Å`
B. `1.54Å`
C. `1.39Å`
D. `1.56Å`

Explanation

To determine the length of carbon-carbon (C-C) bonds in benzene, we can follow these steps:

### Step 1: Understand the Structure of Benzene
Benzene (C6H6) is a cyclic compound with a hexagonal structure. Each carbon atom in benzene is bonded to two other carbon atoms and one hydrogen atom. The structure can be represented as:

```
H H
\ /
C
/ \
H C
| |
C-----C
\ /
C
|
H
```

### Step 2: Identify the Types of Bonds
In benzene, the C-C bonds consist of both sigma (σ) and pi (π) bonds. Each C-C bond has one sigma bond and a delocalized pi bond due to resonance.

### Step 3: Know the Bond Lengths
- The typical length of a single C-C sigma bond is approximately **1.54 Å** (angstroms).
- The length of a double C=C bond (which includes one sigma and one pi bond) is about **1.34 Å**.

### Step 4: Determine the Effective Bond Length in Benzene
Due to resonance in benzene, the C-C bond length is not equal to that of a single or double bond but is an average of the two. Therefore, the bond length in benzene lies between the lengths of a single bond and a double bond:

- The bond length must be greater than **1.34 Å** (double bond) and less than **1.54 Å** (single bond).

### Step 5: Choose the Correct Option
From the options provided:
1. 1.22 Å
2. 1.54 Å
3. 1.39 Å
4. 1.56 Å

The only value that lies between 1.34 Å and 1.54 Å is **1.39 Å**.

### Conclusion
Thus, the length of the C-C bonds in benzene is **1.39 Å**.

---