Write stability order of following intermediates:
`(a)CH_(3)- overset(.)CH_(2)" "(b)CH_(3)- overset(.)CH - CH_(3)`
`(c) CH_(3) - C underset(CH_(3))underset(|)overset(CH_(3))overset(|) * `

Answer

To determine the stability order of the given free radical intermediates, we need to analyze the structure of each radical and apply the principles of stability based on the degree of substitution and the inductive effect.

### Step-by-Step Solution:

1. **Identify the Structures of the Free Radicals:**
- (a) CH₃•CH₂ (Primary free radical)
- (b) CH₃•CH-CH₃ (Secondary free radical)
- (c) CH₃-C(CH₃)₂• (Tertiary free radical)

2. **Determine the Degree of Substitution:**
- The degree of substitution indicates how many alkyl groups are attached to the carbon bearing the radical.
- (a) CH₃•CH₂: This is a primary free radical because the radical carbon is attached to one other carbon.
- (b) CH₃•CH-CH₃: This is a secondary free radical because the radical carbon is attached to two other carbons.
- (c) CH₃-C(CH₃)₂•: This is a tertiary free radical because the radical carbon is attached to three other carbons.

3. **Stability Order Based on Degree of Substitution:**
- The stability of free radicals increases with the number of alkyl groups attached to the radical carbon due to the +I (inductive) effect, which stabilizes the radical.
- The order of stability is: Tertiary > Secondary > Primary.

4. **Write the Final Stability Order:**
- Based on the analysis, the stability order of the given free radicals is:
- (c) > (b) > (a)
- Therefore, the final order is:
- CH₃-C(CH₃)₂• > CH₃•CH-CH₃ > CH₃•CH₂

### Final Stability Order:
(c) > (b) > (a)