Advertisements
Advertisements
प्रश्न
Why is sulphuric acid not used during the reaction of alcohols with KI?
Advertisements
उत्तर
\[\ce{2KI + 2H2SO4 -> 2KHSO4 + 2HI}\]
\[\ce{2HI + H2SO4 -> 2H2O + I2 + SO2}\]
In these reactions, H2SO4 is an oxidising agent. It oxidises the HI formed during the reaction to I2 and prevents the formation of alkyl halide by the reaction of HI and alcohol. To overcome this problem, phosphoric acid (H3PO4) is used instead of H2SO4, which provides HI for the reaction and does not give I2 like H2SO4.
APPEARS IN
संबंधित प्रश्न
Draw the structure of the major monohalo product in the following reaction:
\[\ce{CH3CH2Br + NaI ->}\]
Write the equation for the preparation of 1-iodobutane from 1-butanol.
Write the equation for the preparation of 1-iodobutane from 1-chlorobutane.
How will you bring about the following conversion?
Ethanol to but-1-yne
How will you bring about the following conversion?
Propene to 1-nitropropane
How will you bring about the following conversion?
Propene to propyne
Write the structure of the major organic product in the following reaction:
\[\ce{CH3CH2CH2Cl + NaI ->[acetone][heat]}\]
Write the structure of the major organic product in the following reaction:
\[\ce{CH3CH = C(CH3)2 + HBr ->}\]
How the following conversion can be carried out?
Propene to propan-1-ol
How the following conversion can be carried out?
Benzyl alcohol to 2-phenylethanoic acid
How the following conversion can be carried out?
2-Methyl-1-propene to 2-chloro-2-methylpropane
How the following conversion can be carried out?
But-1-ene to n-butyliodide
Which is the incorrect option?
3-Methyl-pent-2-ene of peroxide forms an addition product. The number of possible stereoisomers for the product is ______.
X and Y will be?
Alkyl halides are prepared from alcohols by treating with ______.
Which of the following alcohols will yield the corresponding alkyl chloride on reaction with concentrated HCl at room temperature?
The reagent used in the conversion of 1-butanol to 1-bromobutane is ______.
