Linkage of Sucrose

[drgreen]

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Is Sucrose linked 1,2 or 1,4. Cliffs looks like 1,4 while wiki is 1,2.

 

[Mstoothlady2012]

Cliffs shows 1,2 as well. You have to remember that sucrose is glucose + fructose. Fructose has a kentone group so it forms 5-memebered ring instead of 6-membered. So the carbond numbering starts from the left top carbon (CH2OH).

 

[drgreen]

thanks