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What functional groups glucose have? Is it an aldehyde or a ketone and why?

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dreamygirl | Student, Undergraduate | (Level 2) eNoter

Posted August 5, 2010 at 11:01 AM via web

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What functional groups glucose have? Is it an aldehyde or a ketone and why?

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ndnordic | High School Teacher | (Level 2) Associate Educator

Posted August 5, 2010 at 11:39 PM (Answer #1)

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glucose, as a solid, has five hydroxyl (OH) groups, and one aldehyde group (CHO) at the end in a linear structure. However, in the body glucose is generally found in a ring form as a alcohol. (see link below)

Aldehydes in general have the structure R-CHO where R is any carbon containing group attached to the carbon, and their is a double bond between the carbon and the oxygen.  Ketones are similar but their general structure is RCOR' , where both R and R' are carbon containing groups, and there is a double bond between the carbon and the oxygen.

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