Answer
Verified
454.2k+ views
Hint: Primary alkyl halide would undergo the reaction which has the stability order \[{{1}^{\circ }}>{{2}^{\circ }}>{{3}^{\circ }}carbocation\]. It would undergo a bimolecular substitution reaction. Primary alkyl halide has very little steric hindrance.
Complete answer:
In \[{{S}_{N}}2\] reactions, the attack of the nucleophile occurs from the backside on the \[\alpha -carbon\] (i.e., carbon carrying the halogen). Therefore, the presence of bulky substituents on or near the atom tends to hinder (block) the approach of the nucleophile to the due to steric hindrance and thus makes the reaction to occur. The greater the steric hindrance, the slower is the reaction. Of all the alkyl halides, methyl halides are the most reactive toward \[{{S}_{N}}2\] reaction because they have three small hydrogen atoms on the \[\alpha -carbon\]. On the other hand, tertiary alkyl halide with three bulky alkyl groups is the least reactive followed by secondary alkyl halide two bulky alkyl groups and primary alkyl halide with one bulky alkyl group. Thus, the overall order of reactivity in \[{{S}_{N}}2\] reaction is:
Methyl halide > primary alkyl halide > secondary alkyl halide > tertiary alkyl halide.
Hence the \[{{S}_{N}}2\] reaction of primary alkyl halide as follows:
First, the nucleophile will attack from the backside, the halogen bond starts breaking and the new carbon-OH bond starts forming. These two processes take place simultaneously in a single step and no intermediate is formed.
The reaction is given below:
So, the correct answer is “Option B”.
Note: The \[{{S}_{N}}2\] reaction is a bimolecular reaction and it follows second order kinetics i.e., the rate of the reaction depends on the concentration of both the reactants. The \[{{S}_{N}}2\] reaction occurs through a transition state in which both the reactants are partially bonded to each other.
Complete answer:
In \[{{S}_{N}}2\] reactions, the attack of the nucleophile occurs from the backside on the \[\alpha -carbon\] (i.e., carbon carrying the halogen). Therefore, the presence of bulky substituents on or near the atom tends to hinder (block) the approach of the nucleophile to the due to steric hindrance and thus makes the reaction to occur. The greater the steric hindrance, the slower is the reaction. Of all the alkyl halides, methyl halides are the most reactive toward \[{{S}_{N}}2\] reaction because they have three small hydrogen atoms on the \[\alpha -carbon\]. On the other hand, tertiary alkyl halide with three bulky alkyl groups is the least reactive followed by secondary alkyl halide two bulky alkyl groups and primary alkyl halide with one bulky alkyl group. Thus, the overall order of reactivity in \[{{S}_{N}}2\] reaction is:
Methyl halide > primary alkyl halide > secondary alkyl halide > tertiary alkyl halide.
Hence the \[{{S}_{N}}2\] reaction of primary alkyl halide as follows:
First, the nucleophile will attack from the backside, the halogen bond starts breaking and the new carbon-OH bond starts forming. These two processes take place simultaneously in a single step and no intermediate is formed.
The reaction is given below:
So, the correct answer is “Option B”.
Note: The \[{{S}_{N}}2\] reaction is a bimolecular reaction and it follows second order kinetics i.e., the rate of the reaction depends on the concentration of both the reactants. The \[{{S}_{N}}2\] reaction occurs through a transition state in which both the reactants are partially bonded to each other.
Recently Updated Pages
what is the correct chronological order of the following class 10 social science CBSE
Which of the following was not the actual cause for class 10 social science CBSE
Which of the following statements is not correct A class 10 social science CBSE
Which of the following leaders was not present in the class 10 social science CBSE
Garampani Sanctuary is located at A Diphu Assam B Gangtok class 10 social science CBSE
Which one of the following places is not covered by class 10 social science CBSE
Trending doubts
Harsha Charita was written by A Kalidasa B Vishakhadatta class 7 social science CBSE
Which are the Top 10 Largest Countries of the World?
Banabhatta wrote Harshavardhanas biography What is class 6 social science CBSE
Difference Between Plant Cell and Animal Cell
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
How do you graph the function fx 4x class 9 maths CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
One Metric ton is equal to kg A 10000 B 1000 C 100 class 11 physics CBSE
Why is there a time difference of about 5 hours between class 10 social science CBSE