Sucrose is not a reducing sugar because it lacks the ability to form either aldehyde or a ketone in a basic solution. It cannot perform as a reducing agent in solutions at a pH above 7, according to Reference.com.Know More
Sucrose, the primary ingredient in table sugar, is a disaccharide consisting of a fructose ring and a glucose ring. It has the chemical formula C6H12O6. Due to the molecular shape of sucrose, there is no place for the aldehyde or ketone formation.
To be classified as a reducing sugar, there must be an open-chain form, including an aldehyde or free hemiacetal group. A monosaccharide that contains the aldehyde group is an aldose, and one containing a ketone group is a ketos. A redox reaction oxidizes the aldehyde and reduces the other compound in solution. The ketone group in the open chain allows the sugar to isomerize to produce an aldehyde when in solution, so fructose and other ketone-bearing sugars are also reducing sugars, even though the ketone cannot be oxidized unless the sugar decomposes.
Chemists use reagents, such as Benedict's solution or other test reagents, to check for reducing sugars. As these reagents react with the sugar, they bring a color change not observed with non-reducing sugars, including sucrose.Learn more about Chemistry
Sucrose has nine stereocenters, as well as one isomer, and can be hydrolysed into glucose and fructose. The hydrolysis reaction is typically slow but can be accelerated by the addition of the enzyme sucrase.Full Answer >
The picric acid test for reducing sugar is a method for detecting the presence of certain kinds of sugar in a solution. Picric acid is added to potash in one-to-one proportions to produce picrate of potassium, which changes color in the presence of glucose and inverted cane sugar.Full Answer >
Diethyl ketone is another name for the chemical compound 3-pentanone. This compound is a ketone, which is better known as a carbonyl group attached to two carbon chains, with two ethyl groups attached on either side of it. It has the molecular formula C5H10O.Full Answer >
An alpha-beta unsaturated ketone is an organic molecule that contains a ketone carbonyl group and a double bond between the alpha and beta carbons in the chain. The carbons in the chain are named based on their proximity to the carbonyl group of the ketone.Full Answer >