Which of the above compounds can be oxidised by H2CrO4 to give a ketone?

Question

Which of the above compounds can be oxidised by H2CrO4 to give a ketone?

BlackTom AI · Accepted Answer

We start by identifying the functional groups of each compound and recall what H2CrO4 (chromic acid) oxidation does to different alcohols and carbonyls.

Option A: A is a secondary alcohol. Chromic acid oxidation converts secondary alcohols to ketones. Therefore, A will be oxidized to a ketone, which fits the question asking for oxidation to a ketone.

Option B: B is an aldehyde (carbonyl with a single hydrogen attached). Under strong oxidizing conditions like H2CrO4, aldehydes are oxidized further to carboxylic acids rather than stopping at ketones. Thus B would not yield a ketone on oxidation.

Option C: C is a primary alcohol. Primary alcohols are oxidized first to aldehydes and then to carboxylic acids under chromic acid oxidation; the product is not a ketone. Hence C does not give a ketone.

Option D (A and B): Since B does not produce a ketone upon oxidation, the combination A and B would not yield a ketone from both substrates. Only A behaves to give a ketone under these conditions.

Which of the above compounds can be oxidised by H2CrO4 to give a ketone?单项选择题

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