Alcènes Flashcards

Les réactions des alcènes

1
Q

Addition de H-X

A

suit MARKOVNIKOV

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2
Q

Addition de l’eau

A

Catalyseur : H2SO4

suit MARKOVNIKOV

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3
Q

Addition de X2

A

formation de pont

donne un mélange racémique

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4
Q

hydrogénation H2

A

catalyseur méttalique (Pd/C)

ADDITION CIS donne un mélange racémique

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5
Q

Hydroboration BH3

A

1) BH3
2)H2O2/NaOH
ADDITION CIS(H et OH) suit anti-MARKOVNIKOV

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6
Q

KMnO4 dilué

A

à froid

ADDITION CIS qui donne un diol

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7
Q

KMnO4 concentré

A

à chaud

donne cétone et/ou acide carboxylique

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8
Q

époxydation

A

Nécessite: péracide

donne : un pont oxygéné et un acide carboxylique

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9
Q

addition radicalaire de H-X

A

catalyseur (hv ou chauffage) plus R-O-O-R

suit anti-MARKOVNIKOV

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10
Q

halogénation en alpha

A

catalyseur: (hv ou chaffage) + AINB
réagi avec un cyclopentane dont la tete est un azote N et les carbones de part et d’autre forment une liaison double chacun avec un oxygène

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11
Q

définir MARKOVNIKOV

A

c’est la formation du carbocation le plus stable

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