Question 1

&#8203;Aldehydes and ketones cannot undergo nucleophilic addition-elimination reactions because:&#10;A)&#8203;they are extremely stable molecules and do not react chemically in most cases.&#10;B)&#8203;they do not have an electronegative atom attached to the carbonyl group to act as a good leaving group.&#10;C)&#8203;they do not have an electronegative atom attached to the &#945;-carbon to act as a good leaving group.&#10;D)&#8203;the bond angles in these molecules are not conducive for simultaneous nucleophilic addition and elimination.

Accepted Answer

Aldehydes and ketones lack an electronegative atom attached to the carbonyl group to act as a good leaving group. This is necessary for nucleophilic addition-elimination reactions to occur.

Question 2

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.

Accepted Answer

KMnO₄ and hot HNO₃ are used to oxidize the aldehyde to the corresponding carboxylic acid, which is then converted to the amino acid using NH₂OH.

Deck 19: Par 4