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What is a pi bond?
sideways overlap of p-orbitals
prevents rotation
What is a stereoisomer?
same structural formula but a different 3D arrangement of atoms in space
E/Z isomerism
cis/trans isomerism - one of the groups must be the same
optical isomerism
What is Markownikoff’s rule?
when a hydrogen halide reacts with an unsymmetrical alkene, the hydrogen attaches itself to the carbon atom with the greater number of hydrogen atoms and the smaller number of carbon atoms
How can waste polymers be disposed of?
recycling
PVC recycling
releases hydrogen chloride and other pollutants
new technology uses solvents to dissolve the polymer
using them as fuel
incinerated to produce heat, generate steam and drive a turbine to produce electricity
feedstock recycling
chemical and thermal processes to reclaim monomers from waste
can be used as raw material for new polymers