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Aldehydes/Ketones and optical isomerism
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Total cards: 3•Content version: v4•Public deck•Updated: 8/1/2026
Card preview (3)
#1
Front (Question)
Describe how to dustinguish between separate samples of the two stereoisomers of CH3CH2CH2CH2(OH)CN
Back (Answer)
• shine polarised light through sample • enantiomers rotate light in opposite directions
#2
Front (Question)
Explain why a reaction produces a racemic mixture
Back (Answer)
• Planar carbonyl group • has equal chance of being attacked on either side • equal amounts of enantiomers made
#3
Front (Question)
describe how propanone and propanal can be distinguishes using a- chemical test (3 marks) b- proton NMR spectra (2 marks)
Back (Answer)
chemical test - add feelings solution - propanal = brick red ppt - porpanone = no reaction proton NMR - propanal = 3 peaks (3 proton env) - propanone = 1 peak (1 proton env)