# CH2 group in alkyl glucoside gives two separate HNMR signals

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It seems like the CH2 next to the sugar gives two different NMR signals which is very interesting. Could someone explain me why?

• The real question is why all the other $\ce{CH2}$ groups don’t ;) – Jan Nov 23 '17 at 14:51

• The way people do this is to replace the atom of interest with a special one that has higher priority than the other. For example, you'd replace one of the hydrogens with $\ce{H}*$. Checking both hydrogens in the OP's question gives two different enantiomers without the sugar and two different diastereostereomers with the sugar. – Zhe Nov 27 '17 at 0:22