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​Aldehydes and ketones cannot undergo nucleophilic addition-elimination reactions because:


A) ​they are extremely stable molecules and do not react chemically in most cases.
B) ​they do not have an electronegative atom attached to the carbonyl group to act as a good leaving group.
C) ​they do not have an electronegative atom attached to the α-carbon to act as a good leaving group.
D) ​the bond angles in these molecules are not conducive for simultaneous nucleophilic addition and elimination.

E) A) and C)
F) All of the above

Correct Answer

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B

​If D-phenylalanine is prepared from an aldehyde compound,the chemicals that would be used are:


A) ​KMnO4 and hot HNO3.
B) ​NaBH4.
C) ​CH3MgCl in ether.
D) ​NH2OH.

E) A) and D)
F) None of the above

Correct Answer

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A

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