Organic Chemistry-Package(Custom)
4th Edition
ISBN: 9781259141089
Author: SMITH
Publisher: MCG
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Chapter 29, Problem 29.9P
Interpretation Introduction
Interpretation: Among the given
Concept Introduction: Racemic mixture is a mixture of enantiomers in equal amounts. It is optically inactive. Racemic mixture can be resolved by the treatment of enantiomers with chiral reagent. Enantiomers have different chemical properties in chiral environment.
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ION
Glycine molecule shows a large conductivity when dissolved in water because;
A.
В.
Glycine dissociates directly and form
Glycine ionizes internally forming a
amino and carboxylate ions
dipole of two charge centers
D.
Glycine ionizes to form a positive ion by
Glycine ionizes to form a negative ion by
protonation of amino group
deprotonation of carboxylic group
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C.
why are peptide amide bonds exist either as s-cis or s-trans conformation?
A) Both conformations have the large groups anti to each other
B) There is partial double bond character between C and N.
C) There is H-bonding between O and N.
D) The side chains does not affect the conformation
E) None of the above
When two amino acids react to form a peptide bond, one forms:
A.) amide by an electrophilic acylic substitution B.) amide by nucleophilic acylic substitution C.) lactam by nucleophilic acylic substitution D.) lactam by an electrophilic acyl substitution
Chapter 29 Solutions
Organic Chemistry-Package(Custom)
Ch. 29 - Prob. 29.1PCh. 29 - Problem 29.2
What form exists at the isoelectric...Ch. 29 - Problem 29.3
Explain why the of the group of an...Ch. 29 - Problem 29.5
What -halo carbonyl compound is...Ch. 29 - Problem 29.6
The enolate derived from diethyl...Ch. 29 - Problem 29.7
What amino acid is formed when is...Ch. 29 - Problem 29.8
What aldehyde is needed to synthesize...Ch. 29 - Prob. 29.8PCh. 29 - Prob. 29.9PCh. 29 - Prob. 29.10P
Ch. 29 - Prob. 29.11PCh. 29 - Problem 29.13
What alkene is needed to synthesize...Ch. 29 - Problem 29.14
Draw the structure of each peptide....Ch. 29 - Name each peptide using both the one-letter and...Ch. 29 - Prob. 29.15PCh. 29 - Prob. 29.16PCh. 29 - Problem 29.18
Glutathione, a powerful antioxidant...Ch. 29 - Problem 29.19
Draw the structure of the...Ch. 29 - Problem 29.20
Give the amino acid sequence of an...Ch. 29 - a What products are formed when each peptide is...Ch. 29 - Prob. 29.21PCh. 29 - Devise a synthesis of each peptide from amino acid...Ch. 29 - Devise a synthesis of the following dipeptide from...Ch. 29 - Prob. 29.24PCh. 29 - Consider two molecules of a tetrapeptide composed...Ch. 29 - What types of stabilizing interactions exist...Ch. 29 - Prob. 29.27PCh. 29 - Draw the product formed when the following amino...Ch. 29 - With reference to the following peptide: a...Ch. 29 - Devise a synthesis of the following dipeptide from...Ch. 29 - Prob. 29.31PCh. 29 - Prob. 29.32PCh. 29 - Histidine is classified as a basic amino acid...Ch. 29 - Tryptophan is not classified as a basic amino acid...Ch. 29 - What is the structure of each amino acid at its...Ch. 29 - To calculate the isoelectric point of amino acids...Ch. 29 - What is the predominant form of each of the...Ch. 29 - 29.37 What is the predominant form of each of the...Ch. 29 - a. Draw the structure of the tripeptide A–A–A, and...Ch. 29 - Draw the organic product formed when the amino...Ch. 29 - 29.39 Draw the organic products formed in each...Ch. 29 - 29.40 What alkyl halide is needed to synthesize...Ch. 29 - 29.41 Devise a synthesis of threonine from diethyl...Ch. 29 - 29.42 Devise a synthesis of each amino acid from...Ch. 29 - Prob. 29.45PCh. 29 - Prob. 29.46PCh. 29 - Prob. 29.47PCh. 29 - Prob. 29.48PCh. 29 - Prob. 29.49PCh. 29 - 29.48 Brucine is a poisonous alkaloid obtained...Ch. 29 - Prob. 29.51PCh. 29 - Prob. 29.52PCh. 29 - Draw the structure for each peptide: (a) Phe–Ala;...Ch. 29 - 29.52 For the tetrapeptide Asp–Arg–Val–Tyr:
a....Ch. 29 - Prob. 29.55PCh. 29 - Explain why a peptide CN bond is stronger than an...Ch. 29 - Prob. 29.57PCh. 29 - 29.55 Draw the amino acids and peptide fragments...Ch. 29 - Prob. 29.59PCh. 29 - Prob. 29.60PCh. 29 - Prob. 29.61PCh. 29 - 29.59 An octapeptide contains the following amino...Ch. 29 - Prob. 29.63PCh. 29 - Prob. 29.64PCh. 29 - Draw all the steps in the synthesis of each...Ch. 29 - 29.62 Write out the steps for the synthesis of...Ch. 29 - 29.64 Another method to form a peptide bond...Ch. 29 - Prob. 29.68PCh. 29 - Prob. 29.69PCh. 29 - Which of the following amino acids are typically...Ch. 29 - After the peptide chain of collagen has been...Ch. 29 - Prob. 29.72PCh. 29 - Prob. 29.73PCh. 29 - 29.70 The anti-obesity drug orlistat works by...Ch. 29 - Prob. 29.75P
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- What special role does the amino acid cysteine have in the peptides vasopressin and oxytocin?arrow_forwardWhich of the following are true concerning the chemical bond that forms between the carboxyl (RCOOH) group of one amino acid and the amino (RCNH2) group of another? a.The bond is called a peptide bond. b.It is formed by inserting a water molecule between them. c.It is formed by a dehydration reaction. d.A polypeptide has more of these bonds than a protein.arrow_forwardGive each of the following amines an IUPAC name. a. b. c.arrow_forward
- What initiates a dehydration process between two amino acids, provided their carboxyl groups are exactly aligned with the amine groups of the other?arrow_forwardname the following amines as primary, secondary,tertiary or quaternaryarrow_forwarda. which amino acid can form an N-linked bond with any carbohydrate b. which amino acid would most likely be found at a rigid turn in a protein structure?arrow_forward
- Classify amines as aliphatic or aromatic amines (by writing the aromaticity rule).arrow_forwardNonearrow_forwardThe hydrolysis of an amide in acidic conditions forms A. a carboxylate salt and an alcohol B. a carboxylate salt and an amine C. an alcohol and an amine salt (an ammonium ion) D. a carboxylic acid and an amine salt (an ammonium ion)arrow_forward
- Is it possible for primary and secondary amines to act as very weak acids? Explain.arrow_forwardA. 2,4-dihydroxybenzaldehyde reacts with ethylamine to form an imine. B. 2,4-dihydroxybenzaldehyde reacts with ethanamide to form an ester. Are the statements True?arrow_forwardWhy are tertiary amines not soluble in water? O a. Primary amine cannot hydrogen bond with water. O b. Amines are non polar compounds. O c. Tertiary amine cannot hydrogen bond with water O d. Secondary amine cannot hydrogen bond with water. Clear my choicearrow_forward
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