HALOGENS REACTION WITH ALKENES

Cards (5)

  • HALOGENS REACTION WITH ALKENES:
    • RAPID reaction
    • No CATALYST needed
  • CHLORINE REACTION:
    • Carbon to carbon DOUBLE bond- becomes a carbon to carbon SINGLE bond (bond BROKEN)
    • CHLORINE molecule- feed across SINGLE bond
  • GENERAL EQUATION: CHLORINE
    ALKENE + CHLORINE -> DICHLORO(ALKANE)
  • BROMINE AND IODINE REACT IN THE SAME WAY:
    ALKENE + BROMINE -> DIBROMO(ALKANE)
    ALKENE + IODINE -> DIIODO(ALKANE)
  • HOW CAN THE REACTION WITH BROMINE BE USED TO DISTINGUISH BETWEEN ALKENES AND ALKANES?
    • Alkenes- DOUBLE bond- more REACTIVE than ALKANES (when added to BROMINE- colour change from ORANGE to COLOURLESS)
    • Alkanes- SATURATED (no DOUBLE bonds) - have no REACTION with BROMINE