Concept explainers
Interpretation:
The reason for the fact that
Concept introduction:
By convention, the terms dextrorotation and levorotation (or laevorotation) represent the movement of plane polarized light clockwise or anticlockwise, respectively, for a compound as seen by the observer whom the light is approaching. The compound exhibiting dextrorotation is said to be dextrorotatory and that exhibiting levorotation is said to be levorotatory.
The dextrorotation and levorotation can be quantized by measuring the degree of specific rotation of the compound,
The value of dextrorotation is positive (+) and that of levorotation is negative (-).
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- Several compounds have been found to inhibit -lactamase, and drugs based on these compounds can be taken in combination with penicillins and cephalosporins to restore their effectiveness when resistance is known to be a problem. The commonly prescribed formulation called Augmentin is a combination of the -lactamase inhibitor shown below with amoxicillin (shown above). It is used to treat childhood ear infections when resistance is suspected, and many kids know it as the white liquid that tastes like bananas. Which of the statements below are true statements? 1. The stereochemistry of the fusion between the four-and five-membered rings in the inhibitor and amoxicillin are different. 2. The inhibitor possesses enol ether and allylic alcohol functional groups while the antibiotic possesses a phenol and a secondary amide functional group. 3. Neither the inhibitor nor the antibiotic contains strained rings. 4. Both 1 and 2 are true.arrow_forward(i) Acetylation of glucose with acetic anhydride gives glucose pentacetate. Write the structure of the pentacetate. (ii) Explain – Why glucose pentacetate does not react with hydroxylamine?arrow_forwardCarbohydrates a. Compound Z is an aldopentose. If Z is oxidized with nitric acid the product is optically active. If Z undergoes one Ruff degradation and the product of that degradation is reduced to the alditol using H₂/Ni the resulting product is optically inactive. If compound Z undergoes two Ruff degradations, D-glyceraldehyde (shown below) is obtained. Draw the usual Fischer projection of Z (aldehyde at the top). (Hint: work backwards from D- glyceraldehyde.) H HIC OH CH₂OH D-Glyceraldehydearrow_forward
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