Chemistry · Class 12 · Chapter 6
Haloalkanes and Haloarenes
13 lessons 92 min 2 simulations
Haloalkanes and haloarenes are hydrocarbons with one or more hydrogens replaced by halogen, on an sp³ or an sp² carbon. The chapter classifies and names them, relates the polar C–X bond to their physical and chemical behaviour, and builds the SN1 and SN2 mechanisms with their stereochemistry, before elimination, organometallics, haloarene reactions and the uses and hazards of polyhalogen compounds.
What the exam asks
NEET tests classification (allylic, benzylic, vinylic, aryl), named reactions (Finkelstein, Swarts, Sandmeyer, Wurtz, Fittig), SN1 versus SN2 rate laws, reactivity orders and stereochemical outcome, KCN versus AgCN, Zaitsev products and why haloarenes resist nucleophilic substitution. Marks are lost by reversing the SN1 and SN2 orders, confusing sign of rotation with configuration, and calling benzylic halides aryl halides.
Lessons
13 lessons · 92 min
1ClassificationNCERT §6.15 min2NomenclatureNCERT §6.25 min3The carbon-halogen bondNCERT §6.36 min4Preparing haloalkanesNCERT §6.46 min5Preparing haloarenesNCERT §6.55 min6Physical propertiesNCERT §6.66 min7Nucleophilic substitution and SN2NCERT §6.7.17 min8SN1 and reactivity orderNCERT §6.7.110 min 1 sim9Stereochemistry of substitutionNCERT §6.7.110 min 1 sim10Elimination and reactions with metalsNCERT §6.7.15 min11Reactions of haloarenesNCERT §6.7.26 min12Polyhalogen compoundsNCERT §6.86 min13Chapter reviewMust-know facts, traps and formulas15 min