ORGANIC CHEMISTRY-W/STUD.SOLN.MAN.
10th Edition
ISBN: 9781260001099
Author: Carey
Publisher: MCG
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Chapter 26, Problem 29P
Interpretation Introduction
Interpretation:
The amino acid obtained by the hydrolysis of the given compound in concentrated hydrochloric acid for several hours at
Concept Introduction:
An optically active amino acid has a carbon atom in its structure, which is attached to the four different atoms or groups.
There is no symmetry element in an optically active amino acid.
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Check out a sample textbook solutionStudents have asked these similar questions
The amino acid (S)-alanine has the physical characteristics listed under the structure.
How does the melting point of a racemic mixture of (R)- and (S)-alanine compare to the melting point of (S)-alanine?
The amino acid (S)-alanine has the physical characteristics listed under the structure.
a.What is the melting point of (R)-alanine?
b.How does the melting point of a racemic mixture of (R)- and (S)-alanine compare to the melting point of (S)-alanine?
c. What is the specific rotation of (R)-alanine, recorded under the same conditions as the reported rotation of (S)-alanine?
d.What is the optical rotation of a racemic mixture of (R)- and (S)-alanine?
e.Label each of the following as optically active or inactive: a solution of pure (S)alanine; an equal mixture of (R)- and (S)-alanine; a solution that contains 75% (S)- and 25% (R)-alanine.
(1) Which is an achiral amino acid?
(2) Which is the basic and the acidic amino acid?
(3) Which is a a cyclic amino acid?
Chapter 26 Solutions
ORGANIC CHEMISTRY-W/STUD.SOLN.MAN.
Ch. 26.1 - Prob. 1PCh. 26.2 - Prob. 2PCh. 26.2 - Prob. 3PCh. 26.3 - Prob. 4PCh. 26.3 - Prob. 5PCh. 26.4 - Prob. 6PCh. 26.4 - Prob. 7PCh. 26.4 - Prob. 8PCh. 26.5 - Prob. 9PCh. 26.6 - Prob. 10P
Ch. 26.6 - Prob. 11PCh. 26.6 - Prob. 12PCh. 26.7 - Prob. 13PCh. 26.7 - Prob. 14PCh. 26.7 - Prob. 15PCh. 26.7 - Prob. 16PCh. 26.7 - Prob. 17PCh. 26.9 - Prob. 18PCh. 26.10 - Digestion of the tetrapeptide of Problem 26.18...Ch. 26.12 - Prob. 20PCh. 26.12 - Prob. 21PCh. 26.15 - Prob. 22PCh. 26.15 - Prob. 23PCh. 26.16 - Prob. 24PCh. 26.17 - Prob. 25PCh. 26.18 - Prob. 26PCh. 26 - Prob. 27PCh. 26 - Prob. 28PCh. 26 - Prob. 29PCh. 26 - Prob. 30PCh. 26 - Prob. 31PCh. 26 - Prob. 32PCh. 26 - Prob. 33PCh. 26 - Prob. 34PCh. 26 - Prob. 35PCh. 26 - Prob. 36PCh. 26 - Prob. 37PCh. 26 - Prob. 38PCh. 26 - Prob. 39PCh. 26 - Prob. 40PCh. 26 - If you synthesized the tripeptide Leu-Phe-Ser from...Ch. 26 - Prob. 42PCh. 26 - Prob. 43PCh. 26 - Prob. 44PCh. 26 - Prob. 45DSPCh. 26 - Prob. 46DSPCh. 26 - Prob. 47DSPCh. 26 - Prob. 48DSPCh. 26 - Prob. 49DSPCh. 26 - Prob. 50DSP
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- Which of these molecules is not a natural amino acid?arrow_forwardDraw the structure of leu-enkephalin, a pentapeptide that acts as an analgesic and opiate, and has the following sequence: Tyr–Gly–Gly–Phe–Leu. (The structure of a related peptide, met-enkephalin, appeared in Section 22.6B.)arrow_forwardThe amino acid (S)-alanine has the physical characteristics listed under the structure. What is the optical rotation of a racemic mixture of (R)- and (S)-alanine?arrow_forward
- What observations led Linus Pauling and his colleaguesto hypothesize that the peptide bond exists as a resonancehybrid?arrow_forwardDraw the structure of optically Inactive tripeptide made from 3 amino acids given in the figure.arrow_forwardUse perspective drawings and Fischer projections to show the stereochemistry of D- andL-amino acids. Explain why the naturally occurring amino acids are called L-amino acidsarrow_forward
- Draw the structure of the dipeptide Lys-Pro that is predominant at pH 8. Include all of the atoms and appropriate charges. Do not use the short-hand line diagrams.arrow_forwardHow many tripeptides can be synthesized using just three different species of a-amino acids?arrow_forwardα-Amino acids can be prepared by treating an aldehyde with ammonia/trace acid, followed by hydrogen cyanide, followed by acid-catalyzed hydrolysis. What amino acid is formed when the aldehyde that is used is 3-methylbutanal?arrow_forward
- Which of these amino acids has a hydrophobic side chain?arrow_forwardA. Lysine is considered a basic amino acid containing a guanidino group. If all ionizable protons from lysine were deprotonated, what will be the overall charge for the lysine? B. Which of the following is true regarding amino acids? -Leucine and isoleucine have the same molecular mass. -Glycine is a chiral molecule. -Proline is considered to be an ⍺-amino acid. -Lysine (short for L) is a basic amino acid.arrow_forwardFor both of the TWO dipeptides that can result from the reaction between zwitterions of 1b and alanine: i) Give the name of the dipeptide. ii) Give the one- and three-letter sequence for the dipeptide. iii) Draw the structure of the dipeptide.arrow_forward
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