Which of the following reactions will produce Acyl Chloride and Phosphorous Acid?
Correct answer: C. Acetic acid + PCl3
- A. Acetic acid + HCl + H3PO4
- B. Acetic acid + PCl5
- C. Acetic acid + PCl3
- D. Acetic acid + Cl2 + H3PO4
Explanation
The reaction of a carboxylic acid with phosphorus trichloride (PCI3) is a standard method for preparing acyl chlorides. The reaction yields the acyl chloride and phosphorous acid [H3PO3) as the byproduct.
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About Carboxylic Acid Derivatives
Carboxylic acid derivatives include acid halides, acid anhydrides, esters and amides, formed by replacing the hydroxyl group of a carboxylic acid. Their nomenclature, structures, preparation, hydrolysis and relative reactivity are linked through nucleophilic acyl substitution, which differs from the nucleophilic addition reactions of aldehydes and ketones.
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