Chemsheets Answers Exclusive - Reactions Of Halogenoalkanes 1

Halogenoalkane + ethanolic KOH (heat) → alkene + KX + H₂O

: Favored by hot, ethanolic conditions (e.g., KOH in ethanol). Common Worksheet Reactions Reagent Conditions Type of Reaction Organic Product Warm, aqueous Nucleophilic Substitution Alcohol (e.g., Ethanol) Hot, ethanolic Nucleophilic Substitution Nitrile (e.g., Propanenitrile) NH₃ (excess) Hot, concentrated Nucleophilic Substitution Amine (e.g., Ethylamine) Hot, ethanolic Elimination Alkene (e.g., Ethene) Mechanism Tips

| Reaction | Reagent & conditions | Product | Mechanism | |----------|----------------------|---------|------------| | 1-bromopropane + NaOH(aq) | NaOH(aq), warm | propan-1-ol | SN2 | | 2-bromo-2-methylpropane + NaOH(aq) | NaOH(aq), room temp | 2-methylpropan-2-ol | SN1 | | 1-chlorobutane + KCN | KCN in ethanol/water, reflux | pentanenitrile | SN2 | | 2-bromobutane + NH₃(excess) | conc NH₃ in ethanol, sealed tube, heat | butan-2-amine | SN2 (with excess NH₃ to avoid further substitution) | | 2-bromopropane + NaOH/ethanol | NaOH in ethanol, heat | propene | E2 | | 1-bromo-2-methylpropane + H₂O | H₂O, slow hydrolysis | 2-methylpropan-1-ol | SN2 (very slow) | reactions of halogenoalkanes 1 chemsheets answers exclusive

Halogenoalkanes undergo nucleophilic substitution and elimination, driven by the polar C-X bond, with reactivity dictating a preference for cap S sub cap N 1 (tertiary) or cap S sub cap N 2

Always show the (the halide ion) with its new lone pair and negative charge. Why is this "Exclusive"? Halogenoalkane + ethanolic KOH (heat) → alkene +

In conclusion, halogenoalkanes are versatile compounds that can undergo a variety of reactions, including nucleophilic substitution and elimination reactions. Understanding these reactions is crucial in organic chemistry, as they are used in the synthesis of a wide range of compounds, from pharmaceuticals to materials.

✅ 2-bromopropane + ethanolic KOH → propene + KBr + H₂O Mechanism: SN2 (if 1° or 2°)

propanenitrile (from bromoethane). Mechanism: SN2 (if 1° or 2°).