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If the relative reactivity of 1∘,2∘ and 3∘ hydrogens towards free redical chlorination is 1:4.5:5.5, what would be the percentage of 1-chloro-2-methycyclohexane in the free radical chlorination of methyl cyclohexane?
- 25%
- 40%
- 60%
- 75%
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If the relative reactivity of 1∘,2∘ and 3∘ hydrogens towards free radical chlorination is 1:4.5:5.5,, the percentage of 1-chloro-2-methycyclohexane in the free radical chlorination of methyl cyclohexane would be 4553.5×25×100= 33%
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Q2
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 selective whereas chlorine is less selective and more effective.
The relative rate of abstraction of hydrogen by Br is
3∘(1600)>2∘(82)>1∘(1)
The relative rate of abstraction of hydrogen by Cl is
3∘(5)>2∘(3.8)>1∘(1)
F. What would be the product ratio x/y in the chlorination of propane if all the hydrogen were abstracted at equal rate ?
CH3−CH2−CH3Cl2−−→hvCH3−CH2−C(x)H2−Cl+CH3−C|Cl(y)H−CH3
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 selective whereas chlorine is less selective and more effective.
The relative rate of abstraction of hydrogen by Br is
3∘(1600)>2∘(82)>1∘(1)
The relative rate of abstraction of hydrogen by Cl is
3∘(5)>2∘(3.8)>1∘(1)
F. What would be the product ratio x/y in the chlorination of propane if all the hydrogen were abstracted at equal rate ?
CH3−CH2−CH3Cl2−−→hvCH3−CH2−C(x)H2−Cl+CH3−C|Cl(y)H−CH3
View Solution
Q3
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 selective whereas chlorine is less selective and more effective.
The relative rate of abstraction of hydrogen by Br is
3∘(1600)>2∘(82)>1∘(1)
The relative rate of abstraction of hydrogen by Cl is
3∘(5)>2∘(3.8)>1∘(1)
A.1 -halo -2, 3 -dimethyl butane will be obtained in better yields, if halogen is :
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 selective whereas chlorine is less selective and more effective.
The relative rate of abstraction of hydrogen by Br is
3∘(1600)>2∘(82)>1∘(1)
The relative rate of abstraction of hydrogen by Cl is
3∘(5)>2∘(3.8)>1∘(1)
A.1 -halo -2, 3 -dimethyl butane will be obtained in better yields, if halogen is :
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Q5
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 selective whereas chlorine is less selective and more effective.
The relative rate of abstraction of hydrogen by Br is
3∘(1600)>2∘(82)>1∘(1)
The relative rate of abstraction of hydrogen by Cl is
3∘(5)>2∘(3.8)>1∘(1)
G. How many dichloro products (including stereoisomers) will be formed when R - 2 - chloropentane reacts with Cl2 in presence of UV radiation ?
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 selective whereas chlorine is less selective and more effective.
The relative rate of abstraction of hydrogen by Br is
3∘(1600)>2∘(82)>1∘(1)
The relative rate of abstraction of hydrogen by Cl is
3∘(5)>2∘(3.8)>1∘(1)
G. How many dichloro products (including stereoisomers) will be formed when R - 2 - chloropentane reacts with Cl2 in presence of UV radiation ?
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