chad ochem quiz

[Vsno123]

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In the carbohydrate quiz, I noticed that the ketohexose formed a 5 membered ring. Can ketohexoses form 6 membered rings too if the oxygen from OH attacks the isomer with the newly formed chiral center (after tautomerization)?

 

[Demps]

In the carbohydrate quiz, I noticed that the ketohexose formed a 5 membered ring. Can ketohexoses form 6 membered rings too if the oxygen from OH attacks the isomer with the newly formed chiral center (after tautomerization)?

What oxygen are you talking about? Give me the carbon number in fischer projection please.

 

[Vsno123]

What oxygen are you talking about? Give me the carbon number in fischer projection please.

after it tautomerizes, i'm referring to C-5

 

[Demps]

If it tautomerizes, it wouldn't be called ketohexose anymore. It is aldohexose. But yes, tautomerization can happen and that is how glucose and fructose are interconvertable.

 

[Vsno123]

If it tautomerizes, it wouldn't be called ketohexose anymore. It is aldohexose. But yes, tautomerization can happen and that is how glucose and fructose are interconvertable.

Oh yeah! thank you.