In which form does glucose exist as a six-membered ring structure?
Understand the Problem
The question is asking about the specific six-membered ring structure of glucose, known as pyranose, and the options provided indicate various forms of glucose, including those that are not six-membered ring structures. The objective is to identify which option corresponds to the correct six-membered ring form of glucose.
Answer
Pyranose form.
Glucose exists as a six-membered ring structure in its pyranose form.
Answer for screen readers
Glucose exists as a six-membered ring structure in its pyranose form.
More Information
Glucose can form a cyclic structure by forming a hemiacetal linkage, which results in a six-membered ring known as the pyranose form. This ring is more stable than a five-membered ring, making the pyranose form the most common structure for glucose in solution.
Tips
A common mistake is confusing the pyranose form with the furanose form, which is a five-membered ring structure. Remember that pyranose has six members.
Sources
- 25.5: Cyclic Structures of Monosaccharides - Anomers - chem.libretexts.org
- Pyranoses and Furanoses: Ring-Chain Tautomerism In Sugars - masterorganicchemistry.com
- Why is the cyclic structure of glucose 6-membered? - quora.com
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