A2: Carbonyls Flashcards
1
Q
Product of reducing a Carbonyl with NaBH4/H2O
A
An alcohol
2
Q
Danger of Hydrogen Cyanide (HCN)
A
Colourless, extremely poisonous, boils only slightly above room temperature
3
Q
Carbonyl + HCN
A
A hydroxynitrile
4
Q
Test for Carbonyls
A
2,4 DNP, yellow or orange precipitate forms
5
Q
Test for aldehydes
A
Tollen’s reagent , Silver mirror forms
6
Q
Identifying ketones/aldehydes by melting point
A
Filter out precipitate, recrystalise, measure melting point and compare to databook
7
Q
Identifying alcohols
A
Add acidified potassium dichromate, orange dichromate(VI) ions to green chromium (III) ions
8
Q
A