Conventions Flashcards

1
Q

Convention de numérotation

A

OH prim., entouré de 1 Carb.
OH second. entouré de 2 Carb.
Carbone 1 Porte le carbonyle
Aldéhyde=+oxydé que l’alcool

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2
Q

Ordre d’oxydation

A

alcool < cétone < aldéhyde < acide carboxylique

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3
Q

Représentation carbone asymétriques

A

Fisher:
Cram:
Fisher simplifié:

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4
Q

Pouvoir rotatoire

A

Lumière déviée à droite: Dextrogyre
Lumière déviée à gauche:
Lévogyre

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5
Q

Aldotriose

A

2 isomères car 1C*

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6
Q

Aldotétrose

A

4 stéréoisomères car 2C*

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7
Q

Comment calculer le nombre de stéréoisomères

A

2^C*

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8
Q

Série D et Série L

A

D si Hydroxyle a droite
L si hydroxyle à gauche
(du dernier C*)

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9
Q

Epimères

A

changement de sens d’un OH, sauf de celui qui définit la série
Ex: Glucose–> Galactose

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10
Q

Epimérases

A

Enzymes catalysant l’inter conversion entre deux épimères. Elles sont capables de modifier un hydroxyle sur un carbone.

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11
Q

Aldopentose

A

8 Stéréoisoméres
4L,4D

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12
Q

Aldohexose

A

16 stéréoisoméres
8L,8D

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13
Q

Cétohexose

A

3C*
8 isomères

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