Glucose is a monosaccharide containing six carbon atoms and an aldehyde group, and is therefore an aldohexose. The glucose molecule can exist in an open-chain (acyclic) as well as ring (cyclic) form. Glucose is naturally occurring and is found in fruits and other parts of plants in its free state.
Is glucose an aldehyde or ketone?
Glucose and fructose, for example, are carbohydrates with the formula C6H12O6. These sugars differ in the location of the C=O. double bond on the six-carbon chain, as shown in the figure below. Glucose is an aldehyde; fructose is a ketone.
What type of aldehyde is glucose?
Glucose is a pentahydroxy aldehyde. Its herniacetal with one of its own alcohol groups is stable, in contrast to most herniacetals. In fact, glucose exists mainly (> 99.9 percent) in the glucopyranose form, a cyclic hemiacetal.
