osumc2014

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For some reason i keep finding mixed answers for this. Does anomeric carbon of beta-D-Fructose point up or down? I think its up but in structure of sucrose, it points down and still is beta. Im confused.
 

G1SG2

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For some reason i keep finding mixed answers for this. Does anomeric carbon of beta-D-Fructose point up or down? I think its up but in structure of sucrose, it points down and still is beta. Im confused.
The -OH group on the anomeric carbon of beta-D-Fructose points up. If it points up, its beta. If it points down, then its alpha.
 

osumc2014

10+ Year Member
7+ Year Member
Jun 27, 2007
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Resident [Any Field]
The -OH group on the anomeric carbon of beta-D-Fructose points up. If it points up, its beta. If it points down, then its alpha.
Yea, I was just checking if it was different for furanoses or not cause they got that extra -CH2OH group at the anomeric carbon.
 
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