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Aldehydes are reduced to the corresponding alcohols by addition of hydrogen in the presence of catalysts to form
- a)primary alcohols
- b)secondary alcohols
- c)tertiary alcohols
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
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Aldehydes are reduced to the corresponding alcohols by addition of hyd...
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Aldehydes are reduced to the corresponding alcohols by addition of hyd...
Yes..option A is correct..because Aldehyde can reduce to corresponding alcohols by addition of hydrogen in the presence of catalysts to form primary alcohols...
R-CHO+H2=R-CH2OH ,,like an example,.
if R is an alkyl halide..then..The reaction should be...
CH3CHO+H2=CH3CH2OH
R-CHO+H2=R-CH2OH ,,like an example,.
if R is an alkyl halide..then..The reaction should be...
CH3CHO+H2=CH3CH2OH
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Aldehydes are reduced to the corresponding alcohols by addition of hyd...
Reduction of Aldehydes to Alcohols
To understand why the correct answer is option 'A', let's first discuss the reduction of aldehydes to alcohols.
Reduction Reaction
Reduction is a chemical reaction that involves the gain of electrons or the decrease in oxidation state of an atom, ion, or molecule. In the case of aldehydes, reduction can be achieved by adding hydrogen gas (H2) in the presence of a suitable catalyst.
Catalytic Hydrogenation
Catalytic hydrogenation is a widely used method for the reduction of aldehydes. The reaction is typically carried out using a transition metal catalyst, such as palladium (Pd), platinum (Pt), or nickel (Ni), supported on a solid substrate like carbon or alumina.
Reaction Mechanism
The reduction of aldehydes to alcohols proceeds via a reaction mechanism known as "addition of hydrogen." Here's a step-by-step explanation of the mechanism:
1. Adsorption of Hydrogen: The aldehyde molecule and hydrogen gas are adsorbed onto the catalyst surface. The catalyst provides a favorable environment for the reaction to occur.
2. Formation of a Metal-Hydrogen Bond: The hydrogen molecule (H2) dissociates on the catalyst surface, and one hydrogen atom forms a bond with the metal catalyst.
3. Migration of the Aldehyde: The aldehyde molecule migrates to the catalyst surface, positioning itself near the metal-hydrogen bond.
4. Addition of Hydrogen: The aldehyde molecule undergoes an addition reaction with the metal-hydrogen bond. One hydrogen atom from the metal-hydrogen bond adds to the carbon atom of the aldehyde, resulting in the formation of an alcohol.
5. Desorption of Alcohol: The newly formed alcohol desorbs from the catalyst surface, leaving space for another aldehyde molecule to undergo the reaction.
Resulting Alcohol
The addition of hydrogen to the aldehyde carbon atom results in the formation of a primary alcohol. A primary alcohol is an alcohol in which the carbon atom bonded to the hydroxyl group (OH) is also bonded to only one other carbon atom.
Therefore, the correct answer is option 'A' - primary alcohols.
To understand why the correct answer is option 'A', let's first discuss the reduction of aldehydes to alcohols.
Reduction Reaction
Reduction is a chemical reaction that involves the gain of electrons or the decrease in oxidation state of an atom, ion, or molecule. In the case of aldehydes, reduction can be achieved by adding hydrogen gas (H2) in the presence of a suitable catalyst.
Catalytic Hydrogenation
Catalytic hydrogenation is a widely used method for the reduction of aldehydes. The reaction is typically carried out using a transition metal catalyst, such as palladium (Pd), platinum (Pt), or nickel (Ni), supported on a solid substrate like carbon or alumina.
Reaction Mechanism
The reduction of aldehydes to alcohols proceeds via a reaction mechanism known as "addition of hydrogen." Here's a step-by-step explanation of the mechanism:
1. Adsorption of Hydrogen: The aldehyde molecule and hydrogen gas are adsorbed onto the catalyst surface. The catalyst provides a favorable environment for the reaction to occur.
2. Formation of a Metal-Hydrogen Bond: The hydrogen molecule (H2) dissociates on the catalyst surface, and one hydrogen atom forms a bond with the metal catalyst.
3. Migration of the Aldehyde: The aldehyde molecule migrates to the catalyst surface, positioning itself near the metal-hydrogen bond.
4. Addition of Hydrogen: The aldehyde molecule undergoes an addition reaction with the metal-hydrogen bond. One hydrogen atom from the metal-hydrogen bond adds to the carbon atom of the aldehyde, resulting in the formation of an alcohol.
5. Desorption of Alcohol: The newly formed alcohol desorbs from the catalyst surface, leaving space for another aldehyde molecule to undergo the reaction.
Resulting Alcohol
The addition of hydrogen to the aldehyde carbon atom results in the formation of a primary alcohol. A primary alcohol is an alcohol in which the carbon atom bonded to the hydroxyl group (OH) is also bonded to only one other carbon atom.
Therefore, the correct answer is option 'A' - primary alcohols.
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Aldehydes are reduced to the corresponding alcohols by addition of hydrogen in the presence of catalysts to forma)primary alcoholsb)secondary alcoholsc)tertiary alcoholsd)None of theseCorrect answer is option 'A'. Can you explain this answer?
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