Organic Chemistry, Books a la Carte Plus Mastering Chemistry with Pearson eText -- Access Card Package (8th Edition)
8th Edition
ISBN: 9780134473147
Author: Paula Yurkanis Bruice
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 21.6, Problem 20P
Why is excess ammonia used in the preceding reaction?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Why is it necessary to keep all materials dry in Grignard reactions?
explain why a high boiling solvent such as ortho-dichlorobenzene is generally not a good choice for running a chemical reaction?
Write the reaction involved in Ferrox Test.
       a. What is the species responsible?
       b. Why is phenol negative in Ferrox Test?
Based on the theoretical result, what is the order of reactivity of primary, secondary, and tertiary alcohols in the Lucas Test?
        a. Lucas Reagent contains ZnCl2 in HCl. What is the role of ZnCl2?
Chapter 21 Solutions
Organic Chemistry, Books a la Carte Plus Mastering Chemistry with Pearson eText -- Access Card Package (8th Edition)
Ch. 21.1 - a. Explain why, when the imidazole ring of...Ch. 21.2 - a. Which isomer(R)-alanine or (S)-alanineis...Ch. 21.2 - Prob. 4PCh. 21.3 - Prob. 5PCh. 21.3 - Prob. 6PCh. 21.3 - Draw the predominant form for glutamate in a...Ch. 21.3 - a. Why is the pKa of the glutamate side chain...Ch. 21.4 - Calculate the pI of each of the following amino...Ch. 21.4 - a. Which amino acid has the lowest pI value? b....Ch. 21.4 - Prob. 12P
Ch. 21.4 - Prob. 13PCh. 21.4 - Explain why the pI of lysine is the average of the...Ch. 21.5 - What aldehyde is formed when valine is treated...Ch. 21.5 - Prob. 16PCh. 21.5 - Prob. 17PCh. 21.5 - Prob. 18PCh. 21.5 - Prob. 19PCh. 21.6 - Why is excess ammonia used in the preceding...Ch. 21.6 - Prob. 21PCh. 21.6 - What amino acid is formed using the...Ch. 21.6 - Prob. 23PCh. 21.6 - What amino acid is formed when the aldehyde used...Ch. 21.7 - Esterase is an enzyme that catalyzes the...Ch. 21.8 - Draw the tetrapeptide Ala-Thr-Asp-Asn and indicate...Ch. 21.8 - Draw the resonance contributors of the peptide...Ch. 21.8 - Which bonds in the backbone of a peptide can...Ch. 21.9 - An opioid pentapeptide has the following...Ch. 21.9 - What is the configuration about each of the...Ch. 21.9 - Glutathione is a tripeptide whose function is to...Ch. 21.10 - What dipeptides would be formed by heating a...Ch. 21.10 - Suppose you are trying to synthesize the dipeptide...Ch. 21.10 - Show the steps in the synthesis of the...Ch. 21.10 - a. Calculate the overall yield of bradykinin when...Ch. 21.11 - Show the steps in the synthesis of the...Ch. 21.13 - Prob. 37PCh. 21.13 - In determining the primary structure of insulin,...Ch. 21.13 - A decapeptide undergoes partial hydrolysis to give...Ch. 21.13 - Explain why cyanogen bromide does not cleave on...Ch. 21.13 - Indicate the peptides produced from cleavage by...Ch. 21.14 - Prob. 43PCh. 21.14 - Three peptides were obtained from a trypsin...Ch. 21.14 - Prob. 45PCh. 21.15 - How would a protein that resides in the nonpolar...Ch. 21.16 - a. Which would have the greatest percentage of...Ch. 21.17 - When apples that have been cut are exposed to...Ch. 21 - Glycine has pK2 values of 2.34 and 9.60. At what...Ch. 21 - Prob. 50PCh. 21 - A titration curve is a plot of the pH of a...Ch. 21 - Prob. 52PCh. 21 - Aspartame (its structure is on page 1007) has a pl...Ch. 21 - Draw the form of aspartate that predominates at...Ch. 21 - Show how phenylalanine can be prepared by...Ch. 21 - A professor was preparing a manuscript for...Ch. 21 - What aldehydes are formed when the following amino...Ch. 21 - Prob. 58PCh. 21 - Determine the amino acid sequence of a polypeptide...Ch. 21 - Prob. 60PCh. 21 - Prob. 61PCh. 21 - Which is the more effective buffer at...Ch. 21 - Identify the location and type of charge on the...Ch. 21 - Draw the product obtained when a lysine side chain...Ch. 21 - After the polypeptide shown below was treated with...Ch. 21 - Treatment of a polypeptide with 2-mercaptoethanol...Ch. 21 - Show how aspartame can be synthesized using DCCD.Ch. 21 - -Amino acids can be prepared by treating an...Ch. 21 - Reaction of a polypeptide with carboxypeptidase A...Ch. 21 - a. How many different octapeptides can be made...Ch. 21 - Glycine has pKa values of 2.3 and 9.6. Do you...Ch. 21 - A mixture of 15 amino acids gave the fingerprint...Ch. 21 - Write the mechanism for the reaction of an amino...Ch. 21 - Prob. 74PCh. 21 - Show how valine can be prepared by a. a...Ch. 21 - The primary structure of -endorphin, a peptide...Ch. 21 - A chemist wanted to test his hypothesis that the...Ch. 21 - Propose a mechanism for the rearrangement of the...Ch. 21 - A normal polypeptide and a mutant of the...Ch. 21 - Determine the amino acid sequence of a polypeptide...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- What is the chemical composition of the nitrating mixture? Why does the incoming nitro group go para and not ortho?arrow_forwardwhy it is not a good idea to use dichloromethane as a solvent in Grignard reactions.arrow_forwardWhat is the purpose of the following? b) Adding H2SO4 to the methyl benzoate in the nitration reaction. c) Adding boiling chips.arrow_forward
- Why are solventless reactions generally faster than reactions done in solution? Why is it important to ensure that the compounds are mixed well during a solventless reaction?arrow_forwardThe preparation of Wittig reagents requires a strong base like butyllithium. Sodium methoxide, used in this reaction to prepare the Horner-Emmons-Wittig reagent, is a weaker base than butyllithium. Suggest a reason why this weaker base is sufficient to prepare the Horner-Emmons-Wittig reagent.arrow_forward2 A. could there be secondary product? B. Indicate why mud crystal is used in the reaction.arrow_forward
- why is potassium hydroxide added to the reaction mixture for Williamson Ether Synthesis?arrow_forwardwhat is the purpose of addition of acid during the reactionarrow_forwardWrite the reaction involved in Ferrox Test.        a. What is the species responsible?        b. Why is phenol negative in Ferrox Test? Based on the theoretical result, what is the order of reactivity of primary, secondary, and tertiary alcohols in the Lucas Test?         a. Lucas Reagent contains ZnCl2 in HCl. What is the role of ZnCl2? What reagents are used in the esterification of Alcohols and Phenols?         a. Write the reaction involved in Primary Alcohol (Ethanol) and Acetyl Chloride         b. Write the reaction involved in Phenol and Acetyl Chloride What is the purpose of the Chromic acid test?         a. What are the reagents used?         b. Write oxidation reaction of Primary Alcohols and Secondary Alcoholsarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Macroscale and Microscale Organic ExperimentsChemistryISBN:9781305577190Author:Kenneth L. Williamson, Katherine M. MastersPublisher:Brooks ColeEBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT
Macroscale and Microscale Organic Experiments
Chemistry
ISBN:9781305577190
Author:Kenneth L. Williamson, Katherine M. Masters
Publisher:Brooks Cole
EBK A SMALL SCALE APPROACH TO ORGANIC L
Chemistry
ISBN:9781305446021
Author:Lampman
Publisher:CENGAGE LEARNING - CONSIGNMENT
Seven Name Reactions in One - Palladium Catalysed Reaction (047 - 053); Author: Rasayan Academy - Jagriti Sharma;https://www.youtube.com/watch?v=5HEKTpDFkqI;License: Standard YouTube License, CC-BY