4.4
- Created by: Bendavies103
- Created on: 15-12-19 19:13
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- Aldehydes and ketones
- oxidation of primary and secondary alcohols
- use oxidising agent: acidified dichromate(Cr2O72-)
- primary oxidise to aldehydes then carboxylic acids
- secondary alcohols oxidise to ketones
- tollens' reagent
- add reagent to tube containing mixture then heat
- if an aldehyde is present a silver mirror is formed
- Fehling's reagent
- warm in presence of suspected aldehyde
- Cu2+ ions are reduced to a red- brown precipitate of Cu2O
- aldehydes can be reducing agents
- can be reduced to primary and secondary alcohols using reducing agents NaBH4
- addition of HCN
- a way of increasing the carbon chain length
- oxidation of primary and secondary alcohols
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