I recieved a ball and stick model set for Christmas. I don't understand why this Glucose is named the way it is. I found information on D-Glucose, but nothing with the + in the middle. Is it the same thing?

I recieved a ball and stick model set for Christmas. I don't understand why this Glucose is named the way it is. I found information on D-Glucose, but nothing with the + in the middle. Is it the same thing?

 

The +/- notation refers to which way the compound rotates plane polarized light, "+" for clockwise and "-" or counter-clockwise. The D/L systems refers to how a compound compares to glyceraldehyde in terms of chirality. The D/L system and +/- systems both refer to the chirality of a compound but there is no correlation between the two.

As Mississippichem has said, its to do with how you'r determinging the stereochemistry. Unforuntantly, D/L, +/- and R/S labells are all unrelted to ach other

So D-Glucose is unrelated to D-(+)-Glucose?

So D-Glucose is unrelated to D-(+)-Glucose?

 

D-Glucose happens to be a "+" compound. So D-Glucose is said to be D(+)Glucose.

I see, so one last question. Is D-Glucose known as Dextrose? Thank you for all of your help. I have learned alot.

I see, so one last question. Is D-Glucose known as Dextrose? Thank you for all of your help. I have learned alot.

 

Yes, but "D-Glucose" is preferred because it is more systematic.

Spectacular