2 interactive concept widgets for Haloalkanes and Haloarenes. Drag any slider, change any number, and watch the formula and the answer update live. Built so you understand how each NEET problem actually works, not just the final number.
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Select substrate type (1°, 2°, 3°, methyl, benzyl), nucleophile strength, and solvent. Predicts the reaction pathway, rate law, stereochemical outcome, and explains the reasoning in detail.
Select substrate type, nucleophile strength, and solvent. The simulator predicts the reaction pathway, rate law, stereochemical outcome, and explains why.
rate ≈ k [RX][Nu] dominates
Predominantly Walden inversion with some racemisation
Mainly concerted; trace carbocation
Predominantly inverted substitution product
Secondary substrate can go either way, but strong nucleophile + polar aprotic solvent tips the balance towards SN2. Back-side attack is possible though hindered. Some SN1 can occur but SN2 dominates under these conditions.
Compare chlorobenzene, cyclohexyl chloride, benzyl chloride, fluorobenzene, and activated haloarenes. See C-X bond character, EAS directing effects, NAS susceptibility, and the resonance explanation for each.
Compare different halogen compounds — from simple haloalkanes to haloarenes to activated aryl halides. See how structure determines reactivity through resonance, bond strength, and mechanism differences.
C₆H₅Cl
169 pm (shorter than C-Cl in haloalkane: 177 pm)
Partial double bond character due to resonance donation of lone pairs into ring pi system
Ortho-para directing; ring is overall deactivated vs benzene
Very poor — requires extreme conditions (300°C, 200 atm NaOH, Dow process)
Cl lone pairs overlap with ring pi orbitals → 5 resonance structures. Negative charge delocalised to ortho/para positions. C-Cl bond strengthened.
C-Cl bond shorter and stronger than in cyclohexyl chloride
Electrophilic substitution gives mainly o- and p-dichlorobenzene
Used as solvent and intermediate for phenol (Dow process)
Benzene ring less reactive than benzene itself (Cl deactivates by -I effect)
Benzyl Cl > Cyclohexyl Cl ≈ (CH₃)₃CCl > Fluorobenzene > Chlorobenzene
Benzyl chloride reacts fast via resonance-stabilised SN1. Haloalkanes react by SN1/SN2 depending on substitution. Haloarenes react poorly — their C-X bond has partial double bond character. Activated haloarenes (with NO₂) react by NAS.Drag, slide and recompute on the next chapter's widgets.
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