Fructose has the molecular formula C₆H₁₂O₆ and contains a ketonic functional group at carbon number 2. It shares similarities with glucose in having six carbons in a straight chain.
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The molecular formula of fructose is C₆H₁₂O₆. Fructose is a monosaccharide, and its structure includes a ketone functional group (C=O) within the carbon chain. Specifically, fructose is a ketohexose, distinguishing it from glucose, which is an aldohexose. The carbonyl group in fructose is located within the five-membered ring structure, forming a ketose sugar. This molecular arrangement contributes to the sweet taste of fructose, and its presence in various natural sources, such as fruits and honey, makes it a common dietary sugar with a distinct metabolic pathway compared to glucose.