(i) CH3 – CH2 – Br + NaOH CH3 – CH2 – OH + NaBr → reaction ... (i)
(ii) + NaOH (CH3)3 C – CH2 – OH + NaBr → reaction ... (ii)
K1 & K2 are rate constant for above reaction correct relation is
This reaction is not proceed in forward direction.
Free energy profile for given reaction is
(Reaction will be proceed in forward direction)
Which of the following alcohols will yield the corresponding alkyl chloride on reaction with concentrated HCl at room temperature?
Option D is correct.
At room temperature more stable carbocation is formed by any alkyl halide then that will give a stable and more efficient product.
Formation of 3o carbocation as intermediate during reaction which is highly stable,this reaction does not require any heating to occur at only room temperature.
Major-product (A) is
This is SN2 reaction (Halide exchange method)
(A), Product (A) is
Which of the following ethers is unlikely to be cleaved by hot conc. HBr ?
The reaction of CH3OC2H5 with one mole HI gives
The correct answer is option C
When ethers are treated with a strong acid in the presence of a nucleophile, they can be cleaved to give alcohols and alkyl halides. If the ether is on a primary carbon this may occur through an SN2 pathway. The reaction of CH3OC2H5 with HI gives CH3I+C2H5OH.
Under identical conditions, solvolysis of which of the following substrates would lead to maximum racemization ?
The reaction of SOCl2 on alkanols to form alkyl chlorides gives good yields because
side product of this reaction are escape out from reaction mixture. So product (alkyl chloride) are occurs in good yield. This is best method for formation of alkyl halide.
Which of the following alcohol shows fastest reaction with HI ?
in above reaction corbocation is formed as intermediate. So rate of reaction stability of carbocation in above option most stable corbocation will formed that reaction will be fast.
Arrange the following compounds in order of decreasing rate of hydrolysis for SN1 reaction
Order of decreasing rate of hydrolysis for SN1 reaction in SN1 reaction intermediate corbocation is formed.
decreasing stability order of following corbocation.
For the given reaction ;
Which substrate will give maximum racemisation
Maximum reacemisation stability of corbocation when substrate having chiral carbon.
Which of these dehydrates most readily when reacts with conc. H3PO4.
(Major). Major product (P) is :
Which of following halides gives fastest elimination reaction when it is treated with alcoholic KOH.
Which alkyl bromide will yield only one alkene upon E2 elimination ?
which is most easily dehydrohalogenated ?
Correct order of yield of Hofmann alkene in following reaction will be
X may be F, Cl Br or l
(bad leaving group) give Haffmann alkene order of X for Hofmann alkene → F > Cl > Br > I
Predict the major product of the following reaction :
major product having aH
Which of the following compound will not undergo Nucleophillic substitution reaction.
Rate of SN2 will be negligible in
Statement 1 : On moving 1° to 3° alkyl halide rate of E2 increases while rate of SN2 decreases
Statement 2 : E2 reaction give element effect respect to halogen.
Both statement are correct
Product of above reaction is
SN1 is a two-step reaction. For each step, there has to be a transition state. Which of the following structures represent correctly the transition state of first step
SN1 is two step reaction.
First step : Formation of carbocation
Which one of the following compounds will give enantiomeric pair on treatment with HOH?
Which of the following compounds is most rapidly hydrolysed by SN1 mechanism
Following comp. is most rapidly hydrolysed by SN1 mechanism.
Most stable corbocation will be more rapidly hydrolysed by SN1 mechanism.
Which will give white ppt. with AgNO3 ?
Following comp. gives white ppt with AgNO3 which formed more stable corbocation.
A. A is :
(T.S will be stable due to electron cloud of p orbital)