4. Alkanes
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What does the term saturated mean?
The term saturated means that they only have single carbon-carbon bonds, there are no double bonds
What is the general formula for alkanes?
CnH2n+2
What are the main reactions of alkanes?
• Undergo combustion reactions • Can be cracked into smaller molecules • Substitution reaction with halogens in the presence of ultraviolet radiation They are generally unreactive compounds.
What is required for halogens to react with alkanes?
Ultraviolet Radiation
Methane reacts with Bromine in a substitution reaction (equation) During the presence of ultraviolet radiation
methane + bromine → bromomethane + hydrogen bromide CH4 + Br2 → CH3Br + HBr The product belongs to a family called halogenoalkanes or haloalkanes
