First, recognize primary (1°), secondary (2°), and tertiary (3°) halogenoalkanes.
Chemsheets tip – The carbon bearing the halogen determines the reaction pathway. reactions of halogenoalkanes 1 chemsheets answers exclusive
Reaction: Halogenoalkane + aqueous OH⁻ → alcohol + halide ion Chemsheets tip – The carbon bearing the halogen
Answers: | Halogenoalkane | Product alcohol | Rate (fastest → slowest) | |----------------|----------------|---------------------------| | CH₃CH₂CH₂Br | propan-1-ol | Medium (1°) | | (CH₃)₃CBr | 2-methylpropan-2-ol | Fastest (3°) | | CH₃CH₂CH₂I | propan-1-ol | Fastest overall (I best leaving group) | Reaction: Halogenoalkane + aqueous OH⁻ → alcohol +
Why?
But precipitate only appears after halogen leaves – so reaction must be nucleophilic substitution. Water is the nucleophile here.