The Role of Sodium Borohydride and Chromic Acid in the Oxidation of Alcohols , Choose the correct reagent to achieve the following transformation. O O HO OH OH O PCC O LAH O sodium borohydride chromic acid

The Role of Sodium Borohydride and Chromic Acid in the Oxidation of Alcohols

Oxidation of alcohol is a chemical reaction involving the transfer of electrons from a substrate to an oxidizing agent. The most common oxidizing agents used in the oxidation of alcohols are chromic acid (CrO3) and sodium borohydride (NaBH4). Chromic acid is a strong oxidizing agent, while sodium borohydride is a milder one. In the presence of chromic acid, the alcohol is oxidized to an aldehyde or carboxylic acid, depending on the reaction conditions. On the other hand, sodium borohydride can oxidize alcohols to aldehydes and ketones (Zhang and Zhang, 2010). The oxidation reaction of alcohol to a carbonyl compound with chromic acid is an example of a two-step reaction. First, the alcohol is protonated by the chromic acid and then the resulting oxonium ion undergoes a nucleophilic attack by the chromium ion. The final product is an aldehyde or a carboxylic acid, depending on the reaction conditions. In the case of sodium borohydride, the alcohol is oxidized to an aldehyde or ketone in a single step under mild conditions. The alcohol is oxidized to an aldehyde by a transfer of electrons from the borohydride anion to the alcohol (Zhang and Zhang, 2010). The use of sodium borohydride and chromic acid in the oxidation of alcohols provides chemists with the ability to selectively oxidize the desired alcohol product under mild conditions. Cont…

 

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