OCR AS level Chemistry: Alkenes

OCR AS level Chemistry: Alkenes is apart of the Module 4: Core Organic Chemistry and Analysis

All presentations come with worked examples, solutions and homeworks

• Comparing pi-bond (π-bond) and sigma bonds (σ-bonds).
• Aliphatic alkenes and alicyclic arrangements of molecules
• s, p, d orbitals for electrons
• Trigonal planar shape of alkanes leading to 120 degree bond angle.
• E/Z isomerism
• Conditions for trans- and cis- isomerism
• Cahn-Ingold-Prelog rules and priority ordering
• Alkene addition reactions:
• Hydrogen with a nickel catalyst
• Halogens
• Hydrogen halide
• Steam with an acid catalyst
• Test for unsaturated alkenes.
• Bond enthalpy for sigma and pi bonds.
• Electrophile molecules
• Electronegativity
• Reaction mechanisms for addition reaction of alkenes and hydrogen halides
• Carbocations and stability
• Markownikoff’s Rule
• Monomers and repeat units
• Addition Polymerisation for:
• Polyethene
• Polypropene
• Polylactate
• Polystyrene
• Polyvinyl Chloride (PVC)
• Environmental Concerns from polymers including:
• Combustion of polymers
• recycling PVC
• biogradeable bioplastics
• photodegradable polymers
• feedstock recycling