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 14, Problem 14.73P
14-73 Lipoic acid is a growth factor for many bacteria
and protozoa and an essential component of several enzymes involved in human
COOH
Lipoic acid
- Name the two
functional groups in lipoic acid.
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Students have asked these similar questions
The following molecule belongs to a class of compounds called enediols; each carbon of
the double bond carries an-OH group. Draw structural formulas for the a-hydroxyketone
and the a-hydroxyaldehyde with which this enediol is in equilibrium.
CH-OH
a-Hydroxyaldehyde =
C-OH= a -Hydroxyketone
ČH3
An enediol
Which of these most likely has the highest boiling point?
O2-pentanol
O diethyl ether
O butanoic acid
O 1-pentanol
O 2-pentanone
pentanal
Aldehydes and ketones react with one molecule of an alcohol to form compounds called hemiacetals, in which there is one hydroxyl group and one ether-like group. Reaction of a hemiacetal with a second
molecule of alcohol gives an acetal and a molecule of water.
ROH, H+
OH
OR
Aldehyde/ketone
Alcohol
ROH, H+
Draw the structural formulas for the hemiacetal and the acetal formed between the following compounds:
OH
OH
OR
OR
• Use the wedge/hash bond tools to indicate stereochemistry where it exists.
+ H₂O
Chapter 14 Solutions
Introduction to General, Organic and Biochemistry
Ch. 14.1 - Prob. 14.1PCh. 14.1 - Prob. 14.2PCh. 14.2 - Problem 14-3 Draw structural formulas for the...Ch. 14.2 - Prob. 14.4PCh. 14.2 - Prob. 14.5PCh. 14.3 - Problem 14-6 Write the common name for each ether.Ch. 14.4 - Prob. 14.7PCh. 14 - 14-8 Answer true or false. The functional group of...Ch. 14 - 14-9 What is the difference in structure between a...Ch. 14 - 14-10 Which of the following are secondary...
Ch. 14 - 14-11 Which of the alcohols in Problem 14-10 are...Ch. 14 - 14-12 Write the 1UPAC name of each compound. (e)...Ch. 14 - Prob. 14.13PCh. 14 - Prob. 14.14PCh. 14 - 14-15 Both alcohols and phenols contain an —OH...Ch. 14 - Prob. 14.16PCh. 14 - 14-17 Explain in terms of noncovalent interactions...Ch. 14 - Prob. 14.18PCh. 14 - Prob. 14.19PCh. 14 - 14-20 Show hydrogen bonding between methanol and...Ch. 14 - 14-21 Show hydrogen bonding between the oxygen of...Ch. 14 - 14-22 Arrange these compounds in order of...Ch. 14 - 14-23 Arrange these compounds in order of...Ch. 14 - 14-24 2-Propanol (isopropyl alcohol) is commonly...Ch. 14 - 14-25 Explain why glycerol is much thicker (more...Ch. 14 - Prob. 14.26PCh. 14 - Prob. 14.27PCh. 14 - 14-28 Give the structural formula of an alkene or...Ch. 14 - Prob. 14.29PCh. 14 - 14-30 Show how to distinguish between cyclohexanol...Ch. 14 - 14-31 Compare the acidity of alcohols and phenols,...Ch. 14 - 14-32 Both 2,6-diisopropylcyclohexanol and the...Ch. 14 - 14-33 Write equations for the reaction of...Ch. 14 - 14-34 Write equations for the reaction of...Ch. 14 - 14-35 Write equations for the reaction of each of...Ch. 14 - 14-36 Show how to convert cyclohexanol to these...Ch. 14 - Prob. 14.37PCh. 14 - Prob. 14.38PCh. 14 - 14-39 Name two important alcohols derived from...Ch. 14 - 14-40 Name two important alcohols derived from...Ch. 14 - Prob. 14.41PCh. 14 - 14-42 Write the common name for each ether. ch3...Ch. 14 - Prob. 14.43PCh. 14 - 14-44 Answer true or false. (a) The functional...Ch. 14 - Prob. 14.45PCh. 14 - Prob. 14.46PCh. 14 - 14-47 Following are structural formulas for...Ch. 14 - 14-48 Explain why methanethiol, CH3SH, has a lower...Ch. 14 - 14-49 Answer true or false. Today, the major...Ch. 14 - Prob. 14.50PCh. 14 - 14-51 (Chemical Connections 14B) When was...Ch. 14 - 14-52 (Chemical Connections 14B) What was Alfred...Ch. 14 - Prob. 14.53PCh. 14 - 14-54 (Chemical Connections 14C) What is the color...Ch. 14 - 14-55 (Chemical Connections 140 The legal...Ch. 14 - 14-56 (Chemical Connections 14D) What does it mean...Ch. 14 - 14-57 (Chemical Connections 14E) What are the...Ch. 14 - Prob. 14.58PCh. 14 - Prob. 14.59PCh. 14 - 14-60 Write a balanced equation for the complete...Ch. 14 - 14-61 Knowing what you do about electronegativity,...Ch. 14 - 14-62 Draw structural formulas and write IUPAC...Ch. 14 - Prob. 14.63PCh. 14 - 14-64 Explain why the boiling point of ethylene...Ch. 14 - Prob. 14.65PCh. 14 - 14-66 1,4-Butanediol, hexane, and 1-pentanol have...Ch. 14 - 14-67 Of the three compounds given in Problem...Ch. 14 - Prob. 14.68PCh. 14 - 14-69 Show how to prepare each compound from...Ch. 14 - 14-70 Show how to prepare each compound from...Ch. 14 - 14-71 The mechanism of the acid-catalyzed...Ch. 14 - Prob. 14.72PCh. 14 - 14-73 Lipoic acid is a growth factor for many...Ch. 14 - 14-74 Following is a structural formula for the...Ch. 14 - Prob. 14.75PCh. 14 - Prob. 14.76PCh. 14 - Prob. 14.77PCh. 14 - 14-78 Consider alkenes A, B, and C. each of which...Ch. 14 - Prob. 14.79P
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- 14-55 (Chemical Connections 140 The legal definition of being under the influence of alcohol is based on blood alcohol content. What is the relationship between breath alcohol content and blood alcohol content?arrow_forward16-28 Following is the structural formula of metformin, the hydrochloride salt of which is marketed as the antidiabetic medication Glucophage. Metformin was introduced into clinical practice in the United States in 1995 for the treatment of type 2 diabetes. More than 25 million prescriptions for this drug were written in 2000, making it the most commonly prescribed brand-name diabetes medication in the nation. NH NH H3(\ 3 N N Nh2ch3 h Metformin Complete the Lewis structure for metformin, showing all valence electrons. Which nitrogen is the most likely site of protonation? Draw the structural formula of Glucophage.arrow_forward13-33 Following is the structural formula of albuterol (Proventil), one of the most widely used inhalation bronchodilators. HO Z Name the functional groups present in albuterol Draw a structural formula for the product formed when albuterol is treated with one equivalent of aqueous sodium hydroxide. Draw a structural formula for the product formed when albuterol is treated with one equivalent of hydrochloric acid.arrow_forward
- 14-31 Compare the acidity of alcohols and phenols, which are both classes of organic compounds that contain an —OH group.arrow_forward14-21 Show hydrogen bonding between the oxygen of di ethyl ether and a hydrogen of water.arrow_forward16-54 Several poisonous plants, including Atropa belladonna, contain the alkaloid atropine. The name “belladonna” (which means “beautiful lady”) probably comes from the fact that Roman women used extracts from this plant to make themselves more attractive. Atropine is widely used by ophthal mologists and optometrists to dilate the pupils for eye examination. Classify the amino group in atropine as primary, secondary, or tertiary. Locate all stereocenters in atropine. Account for the fact that atropine is almost insoluble in water (1 g in 455 mL of cold water) but atropine hydrogen sulfate is very soluble (1 g in 5 mL of cold water). Account for the fact that a dilute aqueous solution of atropine is basic (pH approximately 10.0).arrow_forward
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- 16-58 Following is a structural formula of desosamine, a sugar component of several macrolide antibiotics, including the erythromycins. The configuration shown here is that of the natural product. Erythromycin is produced by a strain of Streptomyces erythreus originally found in a soil sample from the Philippine Archipelago. ch3 T Desosamine Name all the functional groups in desosamine. (Chapter 10) How many stereocenters are present in desosamine? How many stereoisomers are possible for it? How many pairs of enantiomers are possible for it? Draw the alternative chair conformations for desosamine and label which groups are equatorial and which are axial. (d > Which of the alternative chair conformations for desosamine is more stable?arrow_forward17-79 Write an equation for each conversion. (a) 1-Pentanol to pentanal (b) 1-Pentanol to pentanoic acid (c) 2-Pentanol to 2-pentanone (d) 2-Propanol to acetone (e) Cyclohexanol to cyclohexanonearrow_forward16-46 Arrange these three compounds in order of decreas ing ability to form intermolecular hydrogen bonds: CH3OH, CH3SH, and (CH3)2NH.arrow_forward
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