Question:
Which of the following is not true for $S_N1$ reaction ?
Which of the following is not true for $S_N1$ reaction ?
Updated On: May 30, 2022
- Favoured by polar solvents
- $3^\circ$ - alkyl halides generally react through $S_N1$ reaction
- The rate of the reaction does not depend upon the molar concentration of the nucleophile
- $1^\circ$ - alkyl halides generally react through $S_N1$ reaction.
Hide Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
In $S _{ N } 1$ reactions, rate of the reaction depends upon the concentration of the substrate only. It does not depend upon the concentration of the nucleophile.
In this type of reaction, covalent nucleophile reacts/attacks on substrate. $3^{\circ}$ alkyl halide generally react by this mechanism, whereas $1^{\circ}$ alkyl halide generally follow $S _{ N } 2$ reactions. $S _{ N } 1$ reactions are favoured by polar solvents.
In this type of reaction, covalent nucleophile reacts/attacks on substrate. $3^{\circ}$ alkyl halide generally react by this mechanism, whereas $1^{\circ}$ alkyl halide generally follow $S _{ N } 2$ reactions. $S _{ N } 1$ reactions are favoured by polar solvents.
Was this answer helpful?
0
0
Top Questions on Haloalkanes and Haloarenes
- For SN2 reaction, the increasing order of the reactivity of the following alkyl halides is:
(A) CH3CH2CH2CH2Br (B) CH3CH2CH(Br)CH3 (C) (CH3)3CBr (D) (CH3)2CHCH2Br- CUET (UG) - 2024
- Chemistry
- Haloalkanes and Haloarenes
- Match List-I with List-II:
- CUET (UG) - 2024
- Chemistry
- Haloalkanes and Haloarenes
- Although chlorine is electron-withdrawing, it is ortho- and para-directing in electrophilic substitution because • (A) Chlorine withdraws electrons through inductive effect.
(B) Chlorine destabilizes the intermediate carbocation formed during electrophilic sub-stitution.
(C) Chlorine accepts electrons through resonance
(D) Chlorine releases electrons through resonance.
Choose the correct answer from the options given below:- CUET (UG) - 2024
- Chemistry
- Haloalkanes and Haloarenes
- What will be the reactivity order of following compounds towards electrophilic substitution reaction ?
- JEE Main - 2024
- Chemistry
- Haloalkanes and Haloarenes
- Which of the following sets of elements can be detected by Lassaigne's Test ?
- JEE Main - 2024
- Chemistry
- Haloalkanes and Haloarenes
View More Questions
Questions Asked in KCET exam
- Ten identical cells each emf 2V and internal resistance 1Ω are connected in series with two cells wrongly connected. A resistor of 10Ω is connected to the combination. What is the current through the resistor?
- KCET - 2023
- Cells in Series and in Parallel
- The speed of sound in an ideal gas at a given temperature T is v. The rms speed of gas molecules at that temperature is vrms. The ratio of the velocities v and vrms for helium and oxygen gases are X and X' respectively. Then \(\frac{X}{X'}\) is equal to
- KCET - 2023
- Thermodynamics
- If \(p(\frac{1}{q}+\frac{1}{r}),q(\frac{1}{r}+\frac{1}{p}),r(\frac{1}{p}+\frac{1}{q})\) are in A.P., then p, q, r
- KCET - 2023
- Arithmetic Progression
- A stretched wire of a material whose Young's modulus Y = 2 × 1011 Nm-2 has Poisson's ratio of 0.25. Its lateral strain εl = 10-3. The elastic energy density of the wire is
- KCET - 2023
- mechanical properties of solids
- A metallic rod of length 1 m held along east-west direction is allowed to fall down freely. Given horizontal component of earth’s magnetic field BH = 3 × 10-5 T. The emf induced in the rod at an instant t = 2s after it is released is ( Take g = 10 ms-2 )
- KCET - 2023
- Faradays laws of induction
View More Questions
Concepts Used:
Haloalkanes and Haloarenes
The hydrocarbons such as Haloalkanes and Haloarenes are the ones, in which one or more hydrogen atoms are replaced with halogen atoms. The main difference between Haloalkanes and Haloarenes is that Haloalkanes are derived from open chained hydrocarbons, also called alkanes, and Haloarenes are derived from aromatic hydrocarbons.
- Haloalkanes have hydrocarbons made up of aliphatic alkanes and one or more hydrogen atoms replaced by halogens (elements such as Chlorine, Bromine, Fluorine, Iodine, etc.) whereas, haloarenes consist of aromatic ring or rings and one or more hydrogen atoms replaced by halogens.
- In haloalkanes, the halogen atom is attached to the sp3 hybridized carbon atom of the alkyl group whereas, in haloarenes, the halogen atom is attached to the sp3 hybridized carbon atom of the alkyl group.
- Haloalkanes are saturated organic compounds where all the chemical bonds are attached to the carbon atom with single bonds and a single carbon atom is attached to the Halogen atom, whereas, the haloarenes differ from Haloalkanes by their method of preparation and properties.
- Haloalkanes are made by aliphatic alkanes by the process of free radical halogenation, whereas, haloarenes are made by direct halogenation of aromatic rings.
- Haloalkanes are odorless compounds, whereas, haloarenes have a sweet odor.
- Haloalkanes precipitate in SN2 substitution reactions, whereas, haloarenes do not precipitate in SN2 substitution reactions.
- Example of haloalkanes is CH3Cl (Methyl Chloride) and CH3CH2Br (Ethyl Bromide) and the example of haloarenes is Chlorobenzene, Bromobenzene.