Ketohexose

Encyclopedia : K : KE : KET : Ketohexose

A ketohexose is a hexose with a keto group on one end. Ketohexose is a monosaccharide consisting of six carbon atoms and a ketone group.

The Ketohexoses have three chiral centres ("asymmetric carbon atoms") and so 8 different stereoisomers are possible.

The 4 D-ketohexoses are:

CH₂OH       CH₂OH         CH₂OH        CH₂OH
|           |             |            |
C=O         C=O           C=O          C=O
|           |             |            |
HC-OH     HO-CH           HC-OH      HO-CH
|           |             |            |
HC-OH       HC-OH       HO-CH        HO-CH
|           |             |            |
HC-OH       HC-OH         HC-OH        HC-OH
|           |             |            |
CH₂OH       CH₂OH         CH₂OH        CH₂OH
D-Piscose    D-Fructose   D-Sorbose    D-Tagatose

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