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MHT CET202525 Apr 2025Morning ShiftChemistryAlcohols Phenols and EthersActual

Identify the product ' B ' in the following reaction. Sodium phenoxide [6 ~atm ] CO ₂ ;~ 398 ~K ~A H ₃ O ⁺ B

Options

  1. APicric acid
  2. BSulphonic acid
  3. CSalicylic acid
  4. DSalicylaldehyde

Correct answer

C. Salicylic acid

Step-by-step solution

Kolbe-Schmitt Reaction Sequence This sequence illustrates the Kolbe-Schmitt synthesis for salicylic acid production. Sodium phenoxide undergoes electrophilic aromatic substitution with CO₂ at 6 atm pressure and 398 K. The phenoxide ion, being highly nucleophilic due to its negative charge, preferentially attacks the electrophilic carbon of CO₂ at the ortho position, facilitated by sodium ion coordination in a stable transition state. This yields sodium salicylate (A): C₆ H₅ ONa + CO₂ [398 K , 6 atm ] o-HOC₆ H₄ COON

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