Topic 13 0.0 / 5 ? ChemistryHalogenalkanesASAQA Created by: Jemma1494Created on: 06-06-21 12:21 Halogenalkane properties C-X polar bond (x-/c+) Dipole dipole and van der waal forces Boiling points increase down group 7 1 of 5 Nucleophilic substitution Requires a nucleophile (:OH-, :NH3, :CN-, :NU-) Nuclephile attacks slightly positive carbon and causes it to lose halogen 2 of 5 Elimination Requires a secondary or tertiary halogenalkane, ethanol and a high temp & pressure :OH- attacks the hydrogen then the electrons are transferred to they carbon forming a C=C bond and releasing the halogen 3 of 5 CFCs ChloroFluoroCarbons Decompose in the atmosphere via free radical substitution top remove ozone 4 of 5 CFCs reaction C2F3Cl3 -> Cl’ + C2F3Cl2 O3 + Cl’ -> O2 + ClO’ ClO’ + Cl’ -> 2O2 + Cl’ 5 of 5
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