Introduction to General, Organic and Biochemistry
11th Edition
ISBN: 9781285869759
Author: Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher: Cengage Learning
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Chapter 15, Problem 15.37P
15-37 Consider a cyclohexane ring substituted with one
hydroxyl group and one methyl group. Draw a structural formula for a compound of this composition that:
- Does not show cis-trans isomerism and has no stereocenters.
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Chapter 15 Solutions
Introduction to General, Organic and Biochemistry
Ch. 15.1 - Prob. 15.1PCh. 15.2 - Problem 15-2 Assign priorities to the groups in...Ch. 15.2 - Problem 15-3 Assign an R or S configuration to the...Ch. 15.3 - Problem 15-4 3-Amino-2-butanol has two...Ch. 15.3 - Prob. 15.5PCh. 15.3 - Prob. 15.6PCh. 15 - 15-7 Answer true or false. The cis and trans...Ch. 15 - 15-8 What does the term “chiral” mean? Give an...Ch. 15 - 15-9 What does the term “achiral” mean? Give an...Ch. 15 - 15-10 Define the term “stereoisomer.” Name three...
Ch. 15 - 15-11 In what way are constitutional isomers...Ch. 15 - 15-12 Which of the following objects are chiral...Ch. 15 - Prob. 15.13PCh. 15 - Prob. 15.14PCh. 15 - 15-15 Explain why the carbon of a carbonyl group...Ch. 15 - 15-16 Which of the following compounds contain...Ch. 15 - 15-17 Which of the following compounds contain...Ch. 15 - Prob. 15.18PCh. 15 - 15-19 Draw the mirror image for each molecule: OH...Ch. 15 - Prob. 15.20PCh. 15 - 15-21 Answer true or false. For a molecule with...Ch. 15 - Prob. 15.22PCh. 15 - Prob. 15.23PCh. 15 - Prob. 15.24PCh. 15 - Prob. 15.25PCh. 15 - 15-26 For centuries, Chinese herbal medicine has...Ch. 15 - Prob. 15.27PCh. 15 - Prob. 15.28PCh. 15 - Prob. 15.29PCh. 15 - 15-30 (Chemical Connections 15A) What does it mean...Ch. 15 - Prob. 15.31PCh. 15 - Prob. 15.32PCh. 15 - Prob. 15.33PCh. 15 - Prob. 15.34PCh. 15 - 15-35 Following are structural formulas for three...Ch. 15 - Prob. 15.36PCh. 15 - 15-37 Consider a cyclohexane ring substituted with...Ch. 15 - Prob. 15.38PCh. 15 - Prob. 15.39PCh. 15 - Prob. 15.40PCh. 15 - 15-41 Compound A(C5Hh, is not optically active and...Ch. 15 - Prob. 15.42PCh. 15 - 15-43 Triamcinolone acetonide, the active...Ch. 15 - 15-44 Consider the structure of the...Ch. 15 - Prob. 15.45PCh. 15 - 15-46 Consider Lunesta, a nonbenzodiazepine...Ch. 15 - Prob. 15.47P
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- 15-43 Triamcinolone acetonide, the active ingredient in Azmacort Inhalation Aerosol, is a steroid used to treat bronchial asthma. Triamcinolone acetonide Label the eight stereocenters in this molecule. How many stereoisomers are possible for it? (Of these, the stereoisomer with the configura tion shown here is the active ingredient in Azmacort.)arrow_forward15-44 Consider the structure of the immunosuppressant FK-506, a molecule shown to disrupt calcineurin- mediated signal transduction in T-lymphocytes. What is the molecular formula of this immunosuppressant? How manj' stereocenters are present in FK-506? Determine the maximum number of stereoisomers possible. Identify and label the various functional groups present. Consider the two stereocenters in this structure labeled with asterisks (*). Determine the absolute configuration of each stereocenter. FK-506 has been shown to exhibit moderate solubility in various organic solvents. Is this immunosuppressant expected to be soluble in ethanol (CH3CH2OH)? Consider the carbon atom labeled “1." Describe the geometry and approximate bond angles about this carbon atom. Draw the alternative chair conformations of the cyclohexane ring at the lower right of FK-506 and label the more stable conformation. Are there any aromatic components present in FK-506? Patients taking FK-506 have reported several side effects from this medication, including headaches, nausea or diarrhea, and slight shaking. Would you expect the enantiomer of this drug to result in the same side effects?arrow_forward15-7 Answer true or false. The cis and trans stereoisomers of 2-butene are achiral. The carbonyl carbon of an aldehyde, ketone, carboxylic acid, or ester cannot be a stereocenter. Stereoisomers have the same connectivity of their atoms. Constitutional isomers have the same connectivity of their atoms. An unmarked cube is achiral. A human foot is chiral. Every object in nature has a mirror image. The most common cause of chirality in organic molecules is the presence of a tetrahedral carbon atom with four different groups bonded to it. If a molecule is not superposable on its mirror image, the molecule is chiral.arrow_forward
- 15-17 Which of the following compounds contain stereocenters? Cyclopentanol l-Chloro-2-propanol 2-Methylcyclopentanol 1-Phenyl-l-propanolarrow_forward17-54 Following is the structure of immunosuppressant FK-506, a molecule shown to disrupt calcineurin-mediated signal transduction in T-lymphocytes. (a) There are three carbon—carbon double bonds present in this molecule. Which of the three has the potential for cis/trans isomerism? Assign a cis or trans con?guration to each carbon-carbon double bond that has this possibility. (b) How many stereocenters are present in this molecule? How many stereoisomers are possible for it? (c) Are there any aromatic components in this molecule? (d) Consider the two carbon atoms marked with asterisks. Assign an R or S con?guration of each stereocenter. (e) Because of the presence of a 21-member ring, this molecule is described as a macrocycle. This ring is fashioned by three types of bonds, several carbon-carbon bonds, one ester, one hemiacetal, and one amide. Locate the ester and the hemiacetal. (f) Draw the structural formula of the long chain compound that would result if the hemiacetal were to be cleaved to an alcohol and a carbonyl group.arrow_forward15-16 Which of the following compounds contain stereocenters? (a) 2-Chloropentane(b) 3-Chloropentane (c) 3-Chloro-l-butene(d) 1,2-Dichloropropanearrow_forward
- 15-46 Consider Lunesta, a nonbenzodiazepine hypnotic agent (i.e., sleep-inducing drug) that is frequently advertised on TV commercials. Answer the following questions with respect to the given structure: Lunesta Determine the molecular formula for Lunesta. Identify the functional groups present in Lunesta. How many of Lunesta’s rings are aromatic? Fill in the blanks as shown: Lunesta has stereocenter(s) and therefore possible stereoisomer(s). Of the possible stereocenter(s), is/are R and is/are S. Does Lunesta have an enantiomer? Does it have a diastereomer? Which of the following is true about an enantiomer of Lunesta? Identify all that apply: The enantiomer rotates plane-polarized light in the opposite direction as Lunesta. The enantiomer is a mirror image of Lunesta. The enantiomer has the opposite biological effects as Lunesta (i.e., it keeps you awake). Lunesta does not have an enantiomer. Draw an enantiomer of Lunesta. Examine the derivative of the representation of the six-membered ring found in Lunesta. Draw the alternative chair conformations of this ring and label the more stable chair conformation. (Chapter 11)arrow_forward14-22 Arrange these compounds in order of increasing boiling point. Values in °C are —42, 78, 117, and 198 CH3CH2CH2CH2OH CH3CH2OH HOCH2CH2OH ch3ch2ch3arrow_forward13-21 The reaction of bromine with toluene in the presence of FeCl3 gives a mixture of three products, all with the molecular formula C7H7Br. Name and draw a structural formula for each product.arrow_forward
- 15-26 For centuries, Chinese herbal medicine has used extracts oi Ephedra sinica to treat asthma. The asthma-relieving component of this plant is ephedrine, a very potent dilator of the air passages of the lungs. The naturally occurring stereoisomer is levorotatory and has the following structure. HO ¥ Nhch3 Ephedrine |n|„ = —41° Mark each stereocenter in epinephrine with an asterisk. How many stereoisomers are possible for this compound?arrow_forward15-21 Answer true or false. For a molecule with two stereocenters, 22 = 4 stereoisomers are possible. For a molecule with three stereocenters, 32 = 9 stereoisomers are possible. Enantiomers, like gloves, occur in pairs. 2-Pentanol and 3-pentanol are both chiral and show enantiomerism. 1-Methylcyclohexanol is achiral and does not show enantiomerism. Diastereomers are stereoisomers that are not mirror images.arrow_forward13-13 Answer true or false. A phenyl group has the molecular formula C6H5 — and is represented by the symbol Ph —. Para substituents occupy adjacent carbons on a benzene ring. 4-Bromobenzoic acid can be separated into cis and trans isomers. (d, Naphthalene is a planar molecule. (e) Benzene, naphthalene, and anthracene are polynuclear aromatic hydrocarbons (PAHs). Benzo[a] pyrene causes cancer by binding to DNA and producing a cancer-causing mutation.arrow_forward
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