In solvents like DMSO, acetonitrile, F- ion of dissolved NaF is more reactive than in methyl alcohol becasue
CH3OH is more polar than DMSO and CH3CN
CH3OH is less polar than DMSO and CH3CN
unsolvated F- ion is DMSO or CH3CN acts more efficiently as nucleophile
-OH group is a better leaving group than F- ion
In Oppenauer's oxidation,
secondary alcohol is oxidised to carboxylic acid in acetone solvent using aluminium tertiary butoxide
secondary alcohol is oxidised to carboxylic acid without affecting the C=C or C=C bond by aluminium tertiary butoxide in acetone solvent
secondary alcohol is oxidised to ketone without affecting C=C or C=C bond by aluminium tertiary butoxide
secondary alcohol is oxidised to ketone by chromic acid - pyridine complex.
Assertion : In fused state, calcium chloride cannot be used to dry alcohol or NH3.
Reason : CaCl2 is not a good dessicant.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
Assertion : Ethers can be dried by using sodium wire.
Reason : Ethers do not react with sodium.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion: C2H5Br reacts with alcoholic solution of AgNO2 to form nitroethane as the major product.
Reason : NO is an ambidient ion.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Esters which contain -hydrogens undergo Claisen condensation.
Reason : LiAlH4 reduction of esters gives acids.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
CH3OC2H5 and (CH3)3C-OCH3 are treated with hydroiodic acid. The fragments after reactions obtained are
CH3I + HOC2H5; (CH3)3C-I + HOCH3
CH3OH + C2H5I; (CH3)3Cl + HOCH3
CH3OH + C2H5; (CH3)3C-OH + CH3I
CH3I + HOC2H5; CH3I + (CH3)3C-OH
A.
CH3I + HOC2H5; (CH3)3C-I + HOCH3
When the substrate is a methyl t-alkyl ether, the products are t-RI and MeOH. Here reaction occurs by SN1 mechanism and formation of products is controlled by the stability of carbocation. Since carbocation stability order is 3 > 2 > 1 > .
CH3OC2H5 + HI CH3I + C2H5OH
Therefore, alkyl halide is always derived from tert-alkyl group.
In which of the following reactions carbon-carbon bond formation takes place ?
Cannizaro
Reimer - Tiemann
HVZ reaction
Schmidt reaction