Alkenes (Overview)
Electrochemistry

Alkenes (Overview)


← Back to Alkenes

 

Structure & Bonding
  • unsaturated: contain C=C
  • C atoms in C=C are sp2 hybridised
  • non-polar
  • simple molecular structures consisting of alkene molecules held together by weak VDW forces
Physical Properties
  • relatively low mp/bp
  • mp/bp increases with increasing molar mass
  • trans isomer has higher mp than cis isomer due to better packing in the solid lattice
  • insoluble in water; soluble in organic solvents (e.g. CCl4)
Chemical Properties

Alkenes

  • are unsaturated (contain C=C) → undergo addition reaction
  • have an e– rich region (double bond) → react with electrophiles

→ undergo electrophilic addition reactions
Main Reaction(s)
  • Electrophilic addition (with X2/ HX/ H2O)
  • Reduction (with H2)
  • Oxidation (with KMnO4/ K2Cr2O7)




- Alkenes (notes)
← Back to Alkenes   Hydrogenation  Type of Reaction: Reduction/ Addition Hydrogenation is NOT an electrophilic addition reaction; the mechanism is solid state catalysed (adsorption) and does not involve an electrophile. Alkenes do not react...

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PHYSICAL CHEMISTRY 1. ATOMS, MOLECULES AND STOICHIOMETRY • Relative masses of atoms and molecules • The mole, the Avogadro constant • The calculation of empirical and molecular formulae • Reacting masses and volumes (of solutions and gases) 2....

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Electrochemistry








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