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chem also from the markscheme > carbonyl compounds > Flashcards

carbonyl compounds Flashcards

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1
Q

test for a carbonyl group

A

2,4-DNP; forms orange precipitate

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2
Q

test for -COCH3

A

alkaline iodine; forms yellow precipitate

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3
Q

how to tell an aldehyde from a ketone

A

warm with fehling solution; forms red precipitate (blue to red)
-or-
warm with tollens reagent; forms silver mirror

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4
Q

what mechanism is carbonyl + KCN + HCN

A

nucleophilic addition

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5
Q

nucleophilic addition produces a chiral molecule; explain why the product mixture is not optically active

A

planar carbonyl carbon can be attacked on either side; so a racemic mixture is formed

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chem also from the markscheme (19 decks)

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