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Chem Organic Carbonyl > Carbonyl > Flashcards

Carbonyl Flashcards

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1
Q

What does aldehyde reduced to

A

Primary alcohol

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2
Q

What does aldehyde oxidise

A

Carboxylic acid

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3
Q

What does ketone reduced

A

Secondary alcohol

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4
Q

Aldehyde and ketone reduced to alcohol requirements

A

LiAlH4 (lithium aluminum hydride) in dry ether

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5
Q

Aldehyde to carboxylic acid acidified potassium dichromate (VI)

A

Orange to green
+6 to +3

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6
Q

Aldehyde to carboxylic acid fehling reagent

A

Deep blue to red

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7
Q

Aldehyde to carboxylic acid Benedict solution

A

Deep blue solution to red precipitate

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8
Q

Aldehyde to carboxylic acid tolled reagent

A

Colourless to silver mirror

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9
Q

Positive result for fehling and Benedict reagent for aldehyde and ketone

A

Aldehyde
Blue to brick red precipitate

Ketone

Stay blue

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10
Q

Tollen reagent

A

Aldehyde
Silver mirror forms

ketone

Negative

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11
Q

Test for CH3CO ( iodoform reaction)

A

Aldehyde (ethanal) and in methyl ketone (carbonyl group in the second carbon)

Heated with alkaline solution of iodine

Forms yellow precipitate with iodoform

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12
Q

Iodoform test and alcohol

A

If an alcohol contains a R-CH(OH)-CH3 group will also produce a yellow precipitate
—> all methyl secondary alcohol (exam-2-ol) and the primary alcohol ethanol

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13
Q

Test for carbonyl compounds

A

2,4-DNPH
Aldehyde and ketone undergo condensation reaction

Deep orange precipitate positive results

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14
Q

2,4-DNPH melting point

A

Used to identify individuals carbonyl which specific aldehyde or ketone had reacted with 2,4-DNPH

Which then can be compared to literature value

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Chem Organic Carbonyl (2 decks)

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