Concept explainers
(a)
Interpretation: The structure of (R)- and (S)-penicillamine is to be drawn.
Concept introduction: The chemical compounds in which carbon is bonded with acidic and basic group along with hydrocarbon side chain are known as amino acids. The configuration of compound is R and S when the substituents around stereogenic center, from higher priority to lower priority, are present in clockwise and anticlockwise direction, respectively.
(b)
Interpretation: The disulfide formed by the oxidation of (S)-penicillamine is to be predicted.
Concept introduction: The chemical compounds in which carbon is bonded with acidic and basic group along with hydrocarbon side chain are known as amino acids. A disulphide bond is formed when two amino acids containing

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Chapter 27 Solutions
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