Which of the following statement(s) is/are true about the reaction given below:
(1) it involves a carbocation intermediate
(2) rearrangement is due to SN1 reaction mechanism.
(3) it proceeds via a concerted SN2 pathway
(4) it involves neighbouring group participation.
From above mechanism:
If proceecs via a concerted SN2 pathway.
It involves neighbouring group participation.
The reaction (s) which give (s) phenol is/are:
Compound(s) that on hydrogenation product(s) optically inactive compound(s) is(are):
When 20 g of a compound (A) (M.F. = C4H10O4) reacts with excess of CH3MgBr, 14.6 L of CH4 is obtained at STP. What is structural formula of (A)?
In the following reaction, the product(s) formed is (are)
The major product(s) of the following reaction is (are):
Which of the following ethers can be synthesized directly by Williamson’s synthesis:
Among P, Q, R and S the aromatic compound(s) is/are:
The correct statement(s) about the following reaction sequence is/are:
For the following compounds, the correct statement(s) with respect to nucleophile substitution reaction is(are):
Compounds P and R upon ozonolysis produce Q and S, respectively. The molecular formula of Q and S is C8H8O. Q undergoes Cannizzaro reaction but not Haloform reaction, whereas S undergoes Haloform reaction but no Cannizzaro reaction.
The option(s) with suitable combination of P and R, respectively, is(are)
The options (A) and (B) are with suitable combination of P and R, respectively.
When no alpha H atom is present, aldehyde will undergo Cannizzaro reaction. When alpha H atom is present, aldehyde will not undergo Cannizzaro reaction. If it is a methyl ketone, it will undergo haloform reaction.
If it is not a methyl ketone, it will not undergo haloform reaction.
In options (C) and (D), the product on ozonolysis is not having molecular formula C8H8O .
The reactivity of compound Z with different halogens under appropriate conditions is given below:
The observed pattern of electrophilic substitution can be explained by:
In the reaction shown below, the major product(s) formed is/are:
Choose the correct one which will react faster in the SN2 nucleophilic substitution reaction?
Explanation: The carbocation character in the transition state causes stabilization of the resonance and hence CH2 = CH – CH2 – Br (2-bromobutane) is the one which will react faster compared to the others.
Which of the following compound gives even number of Hoffmann’s exhaustive methylation and elimination?
Alcohol on refluxing with Cr2O7 gives ____________
Explanation: Alcohol (R-OH), when it is refluxed with Cr2O7, it forms carboxylic acid (R-COOH).
Which of the following compounds will react with R-SH in aqueous solutions between pH 6.5 and 8.5: [TIFR 2012]
After completion of the reactions (I and II), the organic compound(s) in the reaction mixture is(are):
( In basic medium complete haloform takes place since the rate of reaction increase with each α- halogenation )
(In acidic medium monohalogenation takes place with 1- mol of halogen )
Positive Tollen’s test is observed for:
Identify the binary mixture(s) that can be separated into individual compounds, by differential extraction, as shown in the given scheme.
With reference to the scheme given, which of the given statement(s) about T, U, V and W is (are) correct:
Which of the following compounds will react with ethanolic KCN:
A new C—C bond formation is possible in:
In the reaction the intermediate(s) is/are: