4.4 Aldehydes & Ketones Flashcards
1
Q
Draw the mechanism for reduction of an aldehyde
A
2
Q
Draw reflux and distillation apparatus
A
3
Q
Reduction of butanone with NaBH4
A
4
Q
Draw a hydroxy nitrile group
A
5
Q
How do you test for the presence of a carbonyl?
A
2,4-DNP
- orange solution to orange ppt
6
Q
Describe the test for differentiating between aldehyde and ketone
A
- Tollens reagent (silver mirror test)
- aldehydes reduce Tollens to silver
- ketones don’t react
7
Q
What is the organic product produced from Tollens?
A
Carboxylic acid
8
Q
How do you test for an aldehyde?
A
- Fehlings test (same as Benedict’s)
- brick red when aldehyde present
9
Q
Describe the Iodoform test
A
- add NaOH and iodine
- detects ketones with carbonyl on carbon 2, 2° alcohols with OH on carbon 2, and ethanol
—> yellow ppt!
