Question

Link the following radicals in order of decreasing

Rank the following radicals in order of decreasing stability.

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Answer #1
Concepts and reason

This problem is based on the concept of stability of free radicals.

Stability of free radicals depends on various factors like inductive effect, resonance, mesomeric effect etc. These factors are responsible for decreasing the electron deficiency in order to stabilize the free radicals.

Fundamentals

Free radicals are electron deficient. Thus, groups that provide some electron density to the free radicals make them more stable as compared to the radicals which lack such substituents.

Structure of first compound is given below:

Hzc
C-
CH2
CH3
HzC
tertiary free radical

Structure of second compound is given below:

H₃C
CH
CH-
CH2
`CH2
Hoc
primary free
radical

The structure of third compound is given below:

H₃C
CH-
CH
HzC
`CH₃
secondary
free radical

The structure of fourth compound is given below:

CH
H2C
сн,
allylic free
radical

Ans:

The decreasing order of stability is given below:

HC A CH-CH2
HC-C-CH₂CHs
mocrics
| CH,
HCT-CH₂CH)

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