試題詳解

73. Which is the best procedure for the preparation of 2,4-dinitrobenzoic acid from benzene?
(A) 1. HNO₃/H₂SO₄ 2. CH₃Br/AlCl3 3. HNO₃/H₂SO₄ 4. KMnO₄/H⁺
(B) 1. CH₃Br/AlCl₃ 2. HNO₃/H₂SO₄ 3. KMnO₄/H⁺ 4. HNO₃/H₂SO₄
(C) 1. CH₃Br/AlCl₃ 2. KMnO₄/H⁺ 3. HNO₃/H₂SO₄ (excess)
(D) 1. HNO₃/H₂SO₄ 2. CH₃Br/AlCl₃ 3. KMnO₄/H⁺ 4. HNO₃/H₂SO₄
(E) 1. CH₃Br/AlCl₃ 2. HNO₃/H₂SO₄ (excess) 3. KMnO₄/H⁺