Question
- Despite having an aldehyde group, glucose does not give 2,4-DNP test. What does this indicate?
- Draw the Haworth structure of a-D-(+)-Glucopyranose.
- What is the significance of D and (+) here?
✓
Answer
- This indicates that the aldehyde group in glucose is not free.
- ‘D’ gives the configuration, i.e., the -OH group at C-5 is on the right hand side. (+) sign indicates that the isomer is dextrorotatory.
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