D-Fructose can be reduced with NaBH4. Modify the molecule to show a product of the reaction. You will need to add or remove atoms or bonds. -OH H- CO HO +H H- -OH -OH -OH NaBH HO How is stereochemistry affected in this reaction? A new stereocenter is formed at C2. No new stereocenters are formed. A new stereocenter is formed at C1. give optically a H- -OH CO -H -OH HOH OH What kind of product(s) is/are expected? Two diastereomers are formed. Only one isomer is formed. Two enantiomers are formed. The product(s) is/are meso. Which of the aldopentoses would give optically active alditols upon reduction with NaBH4? 毛毛毛毛 CH₂OH CH₂OH CH₂OH CH₂OH D-ribose D-arabinose D-Xylose D-lyxose D-arabinose D-ribose D-Xylose D-lyxose
Carbohydrates
Carbohydrates are the organic compounds that are obtained in foods and living matters in the shape of sugars, cellulose, and starch. The general formula of carbohydrates is Cn(H2O)2. The ratio of H and O present in carbohydrates is identical to water.
Starch
Starch is a polysaccharide carbohydrate that belongs to the category of polysaccharide carbohydrates.
Mutarotation
The rotation of a particular structure of the chiral compound because of the epimerization is called mutarotation. It is the repercussion of the ring chain tautomerism. In terms of glucose, this can be defined as the modification in the equilibrium of the α- and β- glucose anomers upon its dissolution in the solvent water. This process is usually seen in the chemistry of carbohydrates.
L Sugar
A chemical compound that is represented with a molecular formula C6H12O6 is called L-(-) sugar. At the carbon’s 5th position, the hydroxyl group is placed to the compound’s left and therefore the sugar is represented as L(-)-sugar. It is capable of rotating the polarized light’s plane in the direction anticlockwise. L isomers are one of the 2 isomers formed by the configurational stereochemistry of the carbohydrates.
Ll.94.
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