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sigma bonds
formed by teh head on overlap of px orbitals
all single bonds are sigma bonds, sigma bonds are strong
pi bonds
formed by teh side on overlap of py or pz orbitals
uses of benzene
additive to petrol
carcinogenic
salvent for organic compounds
delocalized pi bond
the formation of a pi bond between the 6 py orbitals in benzene
polymers
macromolecules, large molecules
composed of large numbers of repeating units called monomers
2 polymers
polythene and polypropylene