Domanda del libro di testo
Use Figure 23.1 to identify the family of lipids to which each of these molecules belongs.
b.
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Ch.23 Lipids
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
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TOC.tableOfContents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Non è quello che usi tu?Cambia libro di testo
Capitolo 23, Problema 2
One of the constituents of the carnauba wax used in floor and furniture polish is an ester of a 32-carbon straight-chain alcohol with a C20:0 straight-chain carboxylic acid. Draw the structure of this ester. (Use subscripts to show the numbers of connected CH2 groups.)
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Understand the problem: The ester is formed by the reaction of a 32-carbon straight-chain alcohol and a 20-carbon straight-chain carboxylic acid. Esters are formed through a condensation reaction between an alcohol and a carboxylic acid, releasing water.
Write the general formula for an ester: The ester functional group is represented as RCOOR', where R is the alkyl group from the carboxylic acid and R' is the alkyl group from the alcohol.
Identify the alcohol: The alcohol is a 32-carbon straight-chain alcohol, which can be written as CH₃(CH₂)₃₀CH₂OH. This structure includes a hydroxyl group (-OH) attached to the terminal carbon of the chain.
Identify the carboxylic acid: The carboxylic acid is a 20-carbon straight-chain acid, which can be written as CH₃(CH₂)₁₈COOH. This structure includes a carboxyl group (-COOH) at the terminal carbon of the chain.
Combine the alcohol and carboxylic acid to form the ester: The hydroxyl group (-OH) from the alcohol reacts with the carboxyl group (-COOH) from the acid, forming an ester bond (-COO-) and releasing water. The resulting ester structure is CH₃(CH₂)₁₈COOCH₂(CH₂)₃₀CH₃.
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Ester Formation
Ester formation is a chemical reaction between an alcohol and a carboxylic acid, resulting in the creation of an ester and water. In this case, the ester is formed from a 32-carbon straight-chain alcohol and a C20:0 straight-chain carboxylic acid. Understanding this process is crucial for drawing the correct structure of the ester.
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3:30
Common Naming: Esters Concept 2
Structural Representation of Organic Compounds
Organic compounds are often represented using structural formulas that depict the arrangement of atoms. In this context, it is important to accurately represent the long carbon chains and functional groups, such as the ester linkage, to convey the molecular structure clearly. Using subscripts to indicate the number of CH₂ groups helps in visualizing the carbon backbone.
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2:26Introduction to Organic Chemistry Concept 1
Fatty Acids and Alcohols
Fatty acids are carboxylic acids with long hydrocarbon chains, while alcohols are organic compounds containing hydroxyl (-OH) groups. The specific fatty acid mentioned, C20:0, indicates a saturated fatty acid with 20 carbon atoms, which is essential for understanding the properties of the ester formed with the 32-carbon alcohol. Recognizing the characteristics of these components aids in predicting the behavior and structure of the resulting ester.
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2:00Fatty Acids Concept 1
Pratica correlata
Domanda del libro di testo
Draw the complete structural formula of arachidonic acid (Table 23.1) in a way that shows the cis stereochemistry of its four double bonds.
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Domanda del libro di testo
Write an equation for the complete hydrogenation of triolein, the triacylglycerol with three oleic acid acyl groups for which you drew the structure in Problem 23.3. Name the fatty acid from which the resulting acyl groups are derived.
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Domanda del libro di testo
Can there be any chiral carbon atoms in triacylglycerols? If so, which ones can be chiral and what determines their chirality?
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