Organic Chemistry
9th Edition
ISBN: 9781305080485
Author: John E. McMurry
Publisher: Cengage Learning
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Chapter 5.SE, Problem 60AP
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A chemist synthesized compound X as a racemic mixture. When the ketone group in X was
enzymatically reduced to the corresponding alcohol, a 100% yield was obtained of the product
shown below. Choose the statement that best describes this result.
ОН
enzyme
C;H1
`OCH,CH;
pH 4.0
C3H1
`OCH,CH3
ОН
ÕH
X (racemic)
(100% yield)
One enantiomer of compound X reacts quickly with the enzyme. The other enantiomer of compound X is
unreactive, but rapidly equilibrates with the reactive enantiomer under the reaction conditions.
Since compound X was racemic, it makes sense that only a single product was obtained.
O The product is a meso compound, so either enantiomer of compound X gives the same product.
One enantiomer of compound X reacts quickly with the enzyme, while the other enantiomer of compound X
remains unchanged.
DHA is a fatty acid derived from sh oil and an abundant fatty acid in vertebrate brains. Hydrogenation of DHA forms docosanoic acid [CH3(CH2)20CO2H] and ozonolysis forms CH3CH2CHO, CH2(CHO)2 (ve equivalents), and HCOCH2CH2CO2H. What is the structure of DHA if all double bonds have the Z conguration?
Chemical compound A is an alkene that when treated with ozone followed by treatment of Zn in HOAc produces only (CH3CH2CH2) 2C = O.
What is the structure of A? If A is reacted with peroxyacetic acid, what product would be obtained? Write the corresponding structure. Is this substance optically active? Please include a detailed explanation.
Chapter 5 Solutions
Organic Chemistry
Ch. 5.2 - Prob. 1PCh. 5.2 - Prob. 2PCh. 5.2 - Prob. 3PCh. 5.2 - Prob. 4PCh. 5.3 - Is cocaine (Worked Example 5-2) dextrorotatory or...Ch. 5.3 - Prob. 6PCh. 5.5 - Prob. 7PCh. 5.5 - Prob. 8PCh. 5.5 - Prob. 9PCh. 5.5 - Assign R or S configuration to the chirality...
Ch. 5.5 - Draw a tetrahedral representation of...Ch. 5.5 - Prob. 12PCh. 5.6 - One of the following molecules (a)–(d) is...Ch. 5.6 - Prob. 14PCh. 5.6 - Assign R or S configuration to each chirality...Ch. 5.7 - Prob. 16PCh. 5.7 - Which of the following have a meso form? (Recall...Ch. 5.7 - Does the following structure represent a meso...Ch. 5.8 - Prob. 19PCh. 5.8 - Prob. 20PCh. 5.9 - Prob. 21PCh. 5.11 - Prob. 22PCh. 5.11 - Prob. 23PCh. 5.11 - The lactic acid that builds up in tired muscles is...Ch. 5.11 - The aconitase-catalyzed addition of water to...Ch. 5.SE - Which of the following structures are identical?...Ch. 5.SE - Prob. 27VCCh. 5.SE - Prob. 28VCCh. 5.SE - Assign R or S configuration to each chirality...Ch. 5.SE - Prob. 30VCCh. 5.SE - Prob. 31APCh. 5.SE - Which of the following compounds are chiral? Draw...Ch. 5.SE - Prob. 33APCh. 5.SE - Eight alcohols have the formula C5H12O. Draw them....Ch. 5.SE - Draw compounds that fit the following...Ch. 5.SE - Prob. 36APCh. 5.SE - Prob. 37APCh. 5.SE - Prob. 38APCh. 5.SE - What is the stereochemical configuration of the...Ch. 5.SE - Prob. 40APCh. 5.SE - Prob. 41APCh. 5.SE - Prob. 42APCh. 5.SE - Prob. 43APCh. 5.SE - Assign R or S configuration to each chirality...Ch. 5.SE - Assign R or S configuration to each chirality...Ch. 5.SE - Prob. 46APCh. 5.SE - Assign R or S configuration to each chirality...Ch. 5.SE - Assign R or S configurations to the chirality...Ch. 5.SE - Assign R or S stereochemistry to the chirality...Ch. 5.SE - Prob. 50APCh. 5.SE - Draw examples of the following: (a) A meso...Ch. 5.SE - Prob. 52APCh. 5.SE - Prob. 53APCh. 5.SE - Prob. 54APCh. 5.SE - On reaction with hydrogen gas by a platinum...Ch. 5.SE - Prob. 56APCh. 5.SE - Prob. 57APCh. 5.SE - One of the steps in fat metabolism is the...Ch. 5.SE - The dehydration of citrate to yield cis-aconitate,...Ch. 5.SE - The first step in the metabolism of glycerol,...Ch. 5.SE - One of the steps in fatty-acid biosynthesis is the...Ch. 5.SE - Prob. 62APCh. 5.SE - Draw tetrahedral representations of the two...Ch. 5.SE - The naturally occurring form of the amino acid...Ch. 5.SE - Prob. 65APCh. 5.SE - Prob. 66APCh. 5.SE - Prob. 67APCh. 5.SE - Allenes are compounds with adjacent carbon-carbon...Ch. 5.SE - Prob. 69APCh. 5.SE - Prob. 70APCh. 5.SE - How many stereoisomers of...Ch. 5.SE - Draw both cis- and trans-1,4-dimethylcyclohexane...Ch. 5.SE - Draw both cis- and trans-1,3-dimethylcyclohexane...Ch. 5.SE - cis-1,2-Dimethylcyclohexane is optically inactive...Ch. 5.SE - Prob. 75APCh. 5.SE - Prob. 76APCh. 5.SE - Prob. 77AP
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- Draw and name the seven aldehydes and ketones with the formula C5H10O. Which are chiral?arrow_forwardNitromethane is reacted with ethyl prop-2-enoate with EtO-Na+, EtOH 3 equivalents to give the product X(C16). X then reacts with H2/Raney Ni to give the product Y(C14), which in turn reacts with Na to give Z (C12). Indicate which products X, Y and Z are.arrow_forwardA compound with formula C7H12O is treated with sodium borohydride in methanol to yield 2,2-dimethylcylopentanol. Write a reaction scheme showing the structures of the reactant, the reagents, and the product. Will the product be optically active? Explain.arrow_forward
- Compound X has molecular formula C5H10. In the presence of a metal catalyst, compound X reacts with one equivalent of molecular hydrogen to yield 2-methylbutane. (1) Suggest three possible structures for compound X. (2) Hydroboration-oxidation of compound X yields a product with no chirality centers. Identify the structure of compound X.arrow_forwardAn optically active monoterpene (compound A) with molecular formula C10H18O undergoes catalytic hydrogenation to form an optically inactive compound with molecular formula C10H20O (compound B). When compound B is heated with acid, followed by reaction with O3 and then with dimethyl sulfide, one of the products obtained is 4-methylcyclohexanone. Give possible structures for compounds A and B.arrow_forwardOn treatment with Cl2/hν, a compound with the formula C9H12 yields only a single monochloride. What is a possible structure of the compound?arrow_forward
- In an advanced synthetic chemistry experiment, a researcher prepares a compound, ZY-7, by reacting a ketone (C5H10O) with hydroxylamine (NH2OH), followed by heating in the presence of an acid catalyst. The resulting compound, ZY-7, is then treated with a solution of sodium nitrite (NaNO2) and hydrochloric acid (HCl) at low temperature. Identify the class of compound that ZY-7 most likely belongs to after this series of reactions." A) Amide B) Oxime C) Nitro compound D) Diazonium salt E) Ester Don't use chatgpt please provide valuable answerarrow_forwardMuch of our understanding of conformational analysis has arisen from studies on the reactions of rigid steroid nuclei. For example, the concept of trans-diaxial ring opening of epoxycyclohexanes was proposed to explain the stereoselective reactions seen with steroidal epoxides. Predict the product when each of the following steroidal epoxides is treated with LiAlH4.arrow_forwardThe stereochemistry of the products of reduction depends on the reagent used, as you learned in Sections 20.5 and 20.6. With this in mind, how would you convert 3,3-dimethylbutan-2-one [CH3COC(CH3)3] to: (a) racemic 3,3-dimethylbutan-2- ol [CH3CH(OH)C(CH3)3]; (b) only (R)-3,3-dimethylbutan-2-ol; (c) only (S)-3,3-dimethylbutan-2-ol?arrow_forward
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