Organic Chemistry Study Guide and Solutions Manual, Books a la Carte Edition (8th Edition)
8th Edition
ISBN: 9780134649771
Author: Paula Yurkanis Bruice
Publisher: PEARSON
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Textbook Question
Chapter 23, Problem 28P
When transaminated, the three branched-chain amino acids (valine, leucine, and isoleucine) form compounds that have the characteristic odor of maple syrup. An enzyme known as branched-chain α-keto acid dehydrogenase converts these compounds into CoA esters. People who do not have this enzyme have the genetic disease known as maple syrup urine disease, so called because their urine smells like maple syrup.
- a. Draw the compounds that smell like maple syrup.
- b. Draw the CoA esters.
- c. Branched-chain α-keto acid dehydrogenase has live coenzymes. Identify them.
- d. Suggest a way to treat maple syrup urine disease.
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REPORT FOR EXPERIMENT 9 (continued)
NAME
F. Solubility vs. Temperature; Saturated and Unsaturated Solutions
Data Table: Circle the choices which best describe your observations.
NaCl
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1.0 g +5 mL water
+1.4 g
dissolved completely? yes/no
saturated or unsaturated?
dissolved completely? yes/no
saturated or unsaturated?
2.4 g +5 mL water
+heat
dissolved completely? yes/no
saturated or unsaturated?
2.4 g +5 mL water
after cooling
dissolved completely? yes/no
saturated or unsaturated?
NHC
dissolved completely? yes/no
saturated or unsaturated?
dissolved completely? yes/no
saturated or unsaturated?
dissolved completely? yes/no
saturated or unsaturated?
dissolved completely? yes/no
saturated or unsaturated?
G. Ionic Reactions in Solution
1. Write the word and formula equations representing the chemical reaction that occurred
between the barium chloride solution, BaCl,(aq), and the sodium sulfate solution,
Na SO (aq).
Word Equation:
Formula Equation:
2. (a) Which of the…
In the drawing areas below, draw the two most expected stable conformations of the following molecule:
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Be sure your drawings make it possible to distinguish between the conformations.
After you've drawn the conformations, answer the question below the drawing areas.
Х
S
: ☐
☑
5
Draw the structure of the organic reactant, and write the chemical formula of the reagent used to form the given product.
Click and drag to start
drawing a structure.
+
T
☑
OH
NO₂
NO2
Chapter 23 Solutions
Organic Chemistry Study Guide and Solutions Manual, Books a la Carte Edition (8th Edition)
Ch. 23.1 - Prob. 2PCh. 23.1 - Prob. 3PCh. 23.2 - How many conjugated double bonds are there in a....Ch. 23.2 - Instead of adding to the 4a position and...Ch. 23.2 - Prob. 7PCh. 23.3 - Prob. 8PCh. 23.3 - Acetolactate synthase is another TPP-requiring...Ch. 23.3 - Acetolactate synthase transfers the acyl group of...Ch. 23.3 - Prob. 12PCh. 23.5 - Which compound is more easily decarboxylated?
Ch. 23.5 - Prob. 14PCh. 23.5 - Explain why the ability of PLP to catalyze an...Ch. 23.5 - Explain why the ability of PLP to catalyze an...Ch. 23.5 - The enzyme that catalyzes the C C bond cleavage...Ch. 23.5 - Propose a mechanism for the ,-elimination reaction...Ch. 23.6 - Ethanolamine ammonia lyase, a coenzyme...Ch. 23.6 - Prob. 20PCh. 23.7 - How do the structure of tetrahydrofolate and...Ch. 23.7 - What is the source of the methyl group in...Ch. 23.8 - Thiols such as ethanethiol and propanethiol can be...Ch. 23 - How does the metal ion in carboxypeptidase A...Ch. 23 - Prob. 24PCh. 23 - Prob. 25PCh. 23 - For each of the following reactions, name both the...Ch. 23 - Prob. 27PCh. 23 - When transaminated, the three branched-chain amino...Ch. 23 - What acyl groups have we seen transferred by...Ch. 23 - Propose a mechanism for the following reaction:Ch. 23 - Draw the products of the following reaction, where...Ch. 23 - When UMP is dissolved in T2O, exchange of T for H...Ch. 23 - Dehydratase is a PLP-requiring enzyme that...Ch. 23 - In addition to the reaction mentioned in Section...Ch. 23 - PLP can catalyze both ,-elimination reactions...Ch. 23 - The glycine cleavage system is a group of four...Ch. 23 - Prob. 37PCh. 23 - FADH2 reduces , -unsaturated thioesters to...
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