SN2 reactions that involve substitution at a chirality configuration of one molecule to another, because we know the SN2 reaction will os with inversion. (a) Illustrate how this is true by assigning R,S configurations to the 2-chlorobutane enantiomers based on the following data. [The configuration of (-)-2-butanol is give in Section 5.8C.] HO (+)-2-Chlorobutane (-)-2-Butanol SN2 [a]3 = +36.00 (Enantiomerically pure) [a = -13.52 (Enantiomerically pure) %3D (b) When enantiomerically pure (+)-2-chlorobutane is allowed to react with potassiu iodide in acetone in an SN2 reaction, the 2-iodobutane that is produced has a minus optical rotation. What is the configuration of (-)-2-iodobutane? Of (+)-2-iodobutan
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.
![• PRACTICE PROBLEM 6.6 S 2 reactions that involve substitution at a chirality center can be used to relate the
configuration of one molecule to another, because we know the SN2 reaction will occur
with inversion.
(a) Illustrate how this is true by assigning R,S configurations to the 2-chlorobutane
enantiomers based on the following data. [The configuration of (-)-2-butanol is given
in Section 5.8C.]
HO-
(+)-2-Chlorobutane
(-)-2-Butanol
SN2
[a]3 = +36.00
(Enantiomerically pure)
[a] = -13.52
(Enantiomerically pure)
noin
(b) When enantiomerically pure (+)-2-chlorobutane is allowed to react with potassium
iodide in acetone in an SN2 reaction, the 2-iodobutane that is produced has a minus
optical rotation. What is the configuration of (-)-2-iodobutane? Of (+)-2-iodobutane?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff54fd0cc-fae2-40fc-9cb4-fe45765f163b%2F16f33164-90d2-4c5c-96b7-ad9fbc0b26c2%2Fgabb6dd_processed.jpeg&w=3840&q=75)
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