Aldehydes and ketones- oxid. and reduc. Flashcards
1
Q
What are aldehydes reduced to?
A
primary alcohols
2
Q
What are ketones reduced to?
A
secondary alcohols
3
Q
How can you reduce aldehydes/ketones?
A
-catalytic hydrogenation
-reduction with NaBH4
4
Q
What is the catalyst and temperature for catalytic hydrogenation?
A
Ni , 150C
5
Q
For molecules containing both C=O and C=C bonds, what happens during catalytic hydrogenation?
A
both will become saturated, is non-specific
6
Q
Why is the reduction with NaBH4 specific to the C=O bond?
A
-nucleophiles cannot attack alkenes as electron rich double bond repels them
-so NaBH4 can be used to selectively reduce aldehydes and ketones
7
Q
What condition is the reduction with NaBH4 carried out in?
A
aqueous
8
Q
A
