Alcool Flashcards

1
Q

Hybridation

A

Sp3

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2
Q

Etat a T° ambiante

A

Non gazeux

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3
Q

Acidité

A

Alcool I > Alcool II > Alcool III (mais acidité faible)

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4
Q

Formation d’ether-oxyde

A

Deshydratation inter-moléculaire

2 alcools identiques + agent déshydratant (H2SO4/H3PO4) –> ether-oxyde symétrique

SN1 : Alcool II / III
SN2 : Alcool I

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5
Q

Reaction de Williamson

A

Formation d’ether oxyde DISsymétrique

Pas compris la réaction (SN2)

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6
Q

Esterification de Fischer

A

SN
Acide Carboxylique + Alcool –> Ester + H2O

  • Reaction catalysée par acides minéraux forts
  • Equilibre entre esterification/hydrolyse
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7
Q

Formation d’alcène

A

Déshydratation intra-moléculaire

Alcool + agent déshydratant tmtc –> Alcène + H2O

  • Reaction régioselective
    E1 : Alcool II / III
    E2 : Alcool I
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8
Q

Rôle de la T° dans les déshydratations

A
  • T° élevé : formation d’alcene, E majoritaire

- T° faible : formation d’ether-oxyde, SN majoritaire

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9
Q

Acétalisation / Cétalisation

A

Aldéhyde + alcool –> hémiAcétal (+alcool) –> acétal

Cétone + alcool –> hémicétal (+alcool) –> cétal

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10
Q

Oxydation

A

Alcool I –> Aldéhyde –> Acide carboxylique
Alcool II –> Cétone
Alcool III –> NADA

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