Further Organic Chemistry
- Created by: Tayiab Mahmood
- Created on: 04-05-13 21:50
FURTHER ORGANIC CHEM
Primary alcohols alchols with only one carbon atom directly attached to the carbon with the hydroxyl group
Oxides twice first to a aldehyde then a carboxylic acid
Sulfuric acid ad potassium dichromate oxidising agents
orange to green
Secondary alcohols with 2 carbon atoms directly attached to the carbon atom with the hydroxyl group
Oxidises into a Ketone
Sulfuric acid ad potassium dichromate oxidising agents
Orange to green
Tertiary alcohols 3 carbon atoms directly attached to carbon with hydroxyl group
Dont oxidise
Alcohols liquids at room temp due to h bonds
also have instaneous induced dipole forces between molecules between molecules
stronger forces so they are harder to separate s have a higher boiling temp
Bigger chains less soluble in water smaller more soluble cos they can h bond with water
Methanol manufactured by hot co and h passed over catalyst of zinc and chromium oxide
Ethanol can be made by oxidising glucose from carbohydrates into c2h50h and co2
or through catalytic addition of water to ethene obtained through cracking fractions of crude oil in primary distillation of it (crude oil)
REACTIONS
Combustion burn completely with oxygen to produce co2 and water clean flame
add to petrol to reduce carbon footbprint when it is bioethanol
with sodium produces sodium ethoxide and hydroge if excess ethanol is evaporated na+c2h5o- is seen as a white solid
water added na produced naoh and oh
ethoxide ion creates ethanol and h2
HALOGENATION (substitution reactions)
Chlorination - ethanol +pcl5 and choroethane phosophurusoxycholride and hcl
Bromination - 50% sulphuric acid and bromine 50% as sulphuric acid can oxidise hbr to br
Iodination - Moist red phosphorous and iodine to create phosphorous triodide
phspurous triodide and ethanol to produce iodoethanol and phospurus 3 avid
Test for OH group add chlorine to the substance and hcl fumes will be formed to check if an acid or carboxylic acid add universal indicator acids will
have ph lower than 7 alcohols are neutral
test for tertiary alcohols they dont oxidise so dichromate ions arent decolourised and stay orange
test between ketones and aldehydes = benedicts solution stays blue in ketones dark red precipitate in aldehydes
Secondary alcohols and iodine and naoh to produce pale yellow precipitate of idoform, chi3
a halogenoalkane is a compound where one or more hydrogen atoms…
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