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Halogenation is a substitution reaction,...

Halogenation is a substitution reaction, where halogen replaces one or more hydrogens of hydrocarbon

Chlorine free radical make `1^(@), 2^(@), 3^(@)` radicals with almost equal ease, whereas bromine free radicals have a clear preference for the formation of tertiary free radicals. So, bromine is less reactive, and more selectrive whereas chlorine is less selective and more reactive.
The relative rate of abstraction of hydrogen by `Br^(**)` is
`underset(1600)(3^(@)) gt underset(82)(2^(@)) gt underset(1)(1^(@))`
`underset(5)(3^(@)) gt underset(3.8)(2^(@)) gt underset(1)(1^(@))`
`CH_(3)-overset(CH_(3))overset(|)(CH)-CH_(3)overset(Cl_(2)//hv)(to)` product
Major product in the above reactio is:

A

`CH_(3)-overset(CH_(3))overset(|)(CH)-CH_(2)-Cl`

B

`CH_(3)-overset(CH_(3))overset(|)underset(Cl)underset(|)(CH)-CH_(3)`

C

`CH_(3)-CH_(2)-CH_(2)-Cl`

D

`CH_(3)-underset(Cl)underset(|)(CH)-CH_(2)-CH_(3)`

Text Solution

Verified by Experts

The correct Answer is:
a

`o x-C-overset(C)overset(|)(C)-overset(C)overset(|)(C)-C`
`CH_(3)-overset(CH_(3))overset(|)(CH)-CH_(2)-Cl underset(1^(@))("Relative formation is") = 9xx1`, relative formation of `3^(@) = 5xx1`
`:.` %yield `= 9//14xx100`
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Halogenation is a substitution reaction, where halogen replaces one or more hydrogens of hydrocarbon Chlorine free radical make 1^(@), 2^(@), 3^(@) radicals with almost equal ease, whereas bromine free radicals have a clear preference for the formation of tertiary free radicals. So, bromine is less reactive, and more selectrive whereas chlorine is less selective and more reactive. The relative rate of abstraction of hydrogen by Br^(**) is underset(1600)(3^(@)) gt underset(82)(2^(@)) gt underset(1)(1^(@)) underset(5)(3^(@)) gt underset(3.8)(2^(@)) gt underset(1)(1^(@)) What is the value of x (% yield of product)?

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Halogenation is a substitution reaction, where halogen replaces one or more hydrogens of hydrocarbon Chlorine free radical make 1^(@), 2^(@), 3^(@) radicals with almost equal ease, whereas bromine free radicals have a clear preference for the formation of tertiary free radicals. So, bromine is less reactive, and more selectrive whereas chlorine is less selective and more reactive. The relative rate of abstraction of hydrogen by Br^(**) is underset(1600)(3^(@)) gt underset(82)(2^(@)) gt underset(1)(1^(@)) underset(5)(3^(@)) gt underset(3.8)(2^(@)) gt underset(1)(1^(@)) 1-halo-2,3-dimethyl butane will be obtained in better yields, if halogen is:

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Free Radical

Free radicals have ___.

Formation of free radical is eaisest in: