Halogenation of phenolफ़ीनॉल का हैलोजननHalogenation of phenol

Class 12 Chemistry · Chapter 7 · interactive diagram

Parts and what they mean

• Bromine in a solvent of low polarity (CS₂ / CHCl₃) at low temperature (कम ध्रुवता वाले विलायक (CS₂ / CHCl₃) में कम ताप पर ब्रोमीन) — Controlled conditions → monobromophenols.
• o-Bromophenol (minor) (o-ब्रोमोफ़ीनॉल (गौण)) — Ortho substitution.
• p-Bromophenol (major) (p-ब्रोमोफ़ीनॉल (मुख्य)) — Para product dominates.
• Phenol + bromine water (फ़ीनॉल + ब्रोमीन जल) — All three activated positions (2, 4, 6) are substituted.
• 2,4,6-Tribromophenol (2,4,6-ट्राइब्रोमोफ़ीनॉल) — C₆H₅OH + 3Br₂ → C₆H₂Br₃OH + 3HBr.
• White precipitate + 3HBr (श्वेत अवक्षेप + 3HBr) — The white precipitate is a quick test for phenol.
• Why no Lewis acid is needed (लूइस अम्ल क्यों नहीं चाहिए) — Highly activated ring polarises the bromine molecule.

Original diagram drawn by Simple Learning Hub, based on the NCERT textbook. Report a mistake