AS CHEM2 - Structural isomerism

Structural isomerism

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  • Created on: 18-06-11 22:31
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Chemistry HELP-SHEET 32
STRUCTURAL ISOMERISM
Definition When compounds having the SAME MOLECULAR FORMULA but
DIFFERENT STRUCTURAL FORMULA
Chain · different arrangements of the carbon skeleton
· similar chemical properties
· slightly different physical properties
· more branching = lower boiling point
butane 2-methylpropane
Positional · same carbon skeleton
· same functional group Br
· functional group is in a different position Br
· similar properties 1-bromopropane 2-bromopropane
pent-1-ene pent-2-ene
Functional
Group · different functional group
O O
· different chemical properties
· different physical properties
ethanol methoxymethane
ALCOHOL ETHER
· Examples
ALCOHOLS - ETHERS
ALDEHYDES - KETONES O
CARBOXYLIC ACIDS - ESTERS O
propanal propanone
ALDEHYDE KETONE
O O
O O
propanoic acid methyl ethanoate
CARBOXYLIC ESTER
ACID

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