The alkene shown is subjected to ozonolysis with reductive work-up. How many distinct carbonyl compounds are formed (count compounds, not molecules)?

ATwo
BOne
CThree
DFour

Answer: B

The compound shown is hex-3-ene. It is symmetrical about the double bond, so both carbons give the same fragment, propanal. Two molecules of propanal form, but they are one compound, so the answer is one.

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