2.8 Instrumental Analysis Flashcards
1
Q
IR
A
O-H (Alcohols) - broad peaks around 3000
O-H (carboxylic acids) - unsymmetrical, broad peaks around 3000
C=O - Sharp peak around 1750
C=C - small peak around 1650
Variable depth (around 3000) -
Shallow - ester
Deeper - ketone, aldehyde
2
Q
Functional Group Tests
A
Alkene - bromine or bromine water - brown -> colourless
Halogenoalkane - heat with aqueous NaOH followed by the addition of AgNO3
Cl - White
Br - Cream
I - Yellow
Alcohol - heat with acidified potassium dichromate - orange to green
Carboxylic acid - addition of sodium carbonate - bubbles of CO2 produced, turns limewater cloudy
