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Content Provider | AK Lectures |
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Description | Although carbohydrate molecules do exist to a very small extent in their open chain form, they generally prefer to be in their cyclic form. This is because the cyclic form of carbohydrates is lower in energy and thermodynamically more stable than the open chain counterparts. In order to transform an open chain carbohydrate into its ring form, an intramolecular nucleophilic addition reaction must take place. In this reaction, a hydroxyl group on the open chain sugar nucleophilically attacks the carbon of the carbonyl of that same sugar. Typically, sugars such as aldohexoses (i.e. glucose) exist as a six-membered ring while ketohexoses (i.e. fructose) may exist as either five-membered or six-membered rings. Ribose is an example of a aldopentose that exists only as a five-membered ring. |
Language | English |
Access Restriction | Open |
Subject Keyword | Biochemistry extent carbonyl five-membered reaction sugars chain sugar nucleophilically attacks sugar energy |
Content Type | Video |
Educational Role | Teacher Student |
Educational Use | Self Learning Lecture Reading |
Resource Type | Video Lecture |
Education Level | Under Graduate |
Subject | Organic chemistry |
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