Problems and exercisesHemiacetal Formation
1. Where is the carbonyl?
When (S)-4-hydroxypentanal is dissolved in THF and its IR spectrum is recorded, the C=O band is not seen. Why?
2. Glucose
Glucose in aqueous solution exists almost entirely as a six-membered ring, as a mixture of two anomers, α and β. Which groups react to form the ring? What is an anomer?