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A LEVEL ORGANIC CHEMISTRY > Carbonyl compounds > Flashcards

Carbonyl compounds Flashcards

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1
Q

Carbonyl to alcohol

A

Reagents: NaBH4
Conditions: aqueous (H2O)
Mechanism: reduction/ nucleophilic addition

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2
Q

Reduction overall equation

A

Carbonyl + 2[H] -> alcohol

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3
Q

Carbonyl to 2-hydroxynitrile

A

Reagent: KCN/ H+
Mechanism: nucleophilic addition

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4
Q

Aldehyde to carboxylic acid

A

Reagent: K2Cr2O7/ c.H2SO4
Conditions: warm
Mechanism: oxidation
Observation: orange to green

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5
Q

Carbonyl tests

A
  1. Brady’s reagent 2,4- dinitrophenylhydrazine
  2. produces orange ppt
  3. filtered, recrystallised and dried
  4. measure melting point
  5. compare with known values
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6
Q

Aldehyde test

A
  1. Tollens reagent (Ag(NH3)2+)
  2. 60°C water bath
  3. oxidised to COOH
  4. Ag+ reduced to Ag(s)
  5. silver mirror ppt
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A LEVEL ORGANIC CHEMISTRY (14 decks)

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