chem question organic
Here is the question: https://ibb.co/HK0FxTQ
Thanks!
Reply 1
Here is the question: https://ibb.co/HK0FxTQ
Thanks!
It’s oxidation of an aldehyde to a carboxylic acid, so you would use acidified K2Cr2O7. You can do the reaction at room temp, but it will proceed slowly compared to when heated.
Reply 2
I see, thanks for clarifying
Reply 3
Here is the question: https://ibb.co/HK0FxTQ
Thanks!
The reaction shown involves the oxidation of an aldehyde group (from the compound on the left) to a carboxylic acid group (in the product on the right). This type of reaction is typically carried out using an oxidizing agent.
Analyzing the options:
•
Option A: Acidified dichromate (VI) ions
•
Acidified potassium dichromate (K2Cr2O7K_2Cr_2O_7) is a strong oxidizing agent. It can oxidize aldehydes to carboxylic acids under acidic conditions.
•
This reagent is suitable for the reaction shown.
•
Option B: Dilute, acidified manganate (VII) ions
•
Acidified potassium permanganate (KMnO4KMnO_4) is also a strong oxidizing agent. In its dilute form, it can oxidize aldehydes to carboxylic acids efficiently.
•
This reagent is also suitable for this reaction.
•
Option C: Hot, concentrated, acidified manganate (VII) ions
•
Hot, concentrated KMnO4KMnO_4 is a very strong oxidizing agent that can cause overoxidation or even degrade the compound (e.g., breaking carbon-carbon bonds). This is excessive for the mild oxidation of an aldehyde to a carboxylic acid.
•
This option is too harsh for the reaction.
•
Option D: Concentrated sulfuric acid
•
Concentrated sulfuric acid alone is not an oxidizing agent. It is used for acidifying solutions but does not oxidize aldehydes to carboxylic acids.
•
This option is incorrect.
Both A (acidified dichromate) and B (dilute, acidified manganate) are correct, but the most commonly chosen oxidizing agent for this reaction is A.
HMU on kennetholive51atgmaildotcom
Reply 4
Analyzing the options:
•
Option A: Acidified dichromate (VI) ions
•
Acidified potassium dichromate (K2Cr2O7K_2Cr_2O_7) is a strong oxidizing agent. It can oxidize aldehydes to carboxylic acids under acidic conditions.
•
This reagent is suitable for the reaction shown.
•
Option B: Dilute, acidified manganate (VII) ions
•
Acidified potassium permanganate (KMnO4KMnO_4) is also a strong oxidizing agent. In its dilute form, it can oxidize aldehydes to carboxylic acids efficiently.
•
This reagent is also suitable for this reaction.
•
Option C: Hot, concentrated, acidified manganate (VII) ions
•
Hot, concentrated KMnO4KMnO_4 is a very strong oxidizing agent that can cause overoxidation or even degrade the compound (e.g., breaking carbon-carbon bonds). This is excessive for the mild oxidation of an aldehyde to a carboxylic acid.
•
This option is too harsh for the reaction.
•
Option D: Concentrated sulfuric acid
•
Concentrated sulfuric acid alone is not an oxidizing agent. It is used for acidifying solutions but does not oxidize aldehydes to carboxylic acids.
•
This option is incorrect.
Both A (acidified dichromate) and B (dilute, acidified manganate) are correct, but the most commonly chosen oxidizing agent for this reaction is A.
Reply 5
Analyzing the options:
•
Option A: Acidified dichromate (VI) ions
•
Acidified potassium dichromate (K2Cr2O7K_2Cr_2O_7) is a strong oxidizing agent. It can oxidize aldehydes to carboxylic acids under acidic conditions.
•
This reagent is suitable for the reaction shown.
•
Option B: Dilute, acidified manganate (VII) ions
•
Acidified potassium permanganate (KMnO4KMnO_4) is also a strong oxidizing agent. In its dilute form, it can oxidize aldehydes to carboxylic acids efficiently.
•
This reagent is also suitable for this reaction.
•
Option C: Hot, concentrated, acidified manganate (VII) ions
•
Hot, concentrated KMnO4KMnO_4 is a very strong oxidizing agent that can cause overoxidation or even degrade the compound (e.g., breaking carbon-carbon bonds). This is excessive for the mild oxidation of an aldehyde to a carboxylic acid.
•
This option is too harsh for the reaction.
•
Option D: Concentrated sulfuric acid
•
Concentrated sulfuric acid alone is not an oxidizing agent. It is used for acidifying solutions but does not oxidize aldehydes to carboxylic acids.
•
This option is incorrect.
Both A (acidified dichromate) and B (dilute, acidified manganate) are correct, but the most commonly chosen oxidizing agent for this reaction is A.
B is wrong, because it would oxidise the C=C bond to a diol
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