Concept explainers
Interpretation:
The reason for insolubility of amino acids in diethyl ether unlike most of the
Concept introduction:
Polar compound soluble in polar solvents and non-polar compounds dissolves in non-polar solvents (like dissolves like).
Amino acids exist as zwitterion at certain pH, in which the amount of positive charge and negative charge on an amino acid becomes balanced.
Answer to Problem 47P
Diethyl ether is a non-polar solvent. Amines and carboxylic acids are more resemble to non-polar compound and amino acids are polar compounds, so it is insoluble in diethyl ether.
Explanation of Solution
Diethyl ether is a non-polar solvent, so it solubilize neutral or compounds having some single charge (either +ve or -ve).
Most of amines and carboxylic acids are neutral or it may have single charges, but both cases the compound is more resemble to non-polar compound.
In case of amino acids, Amino acids exist as zwitterion at certain pH, in which the amount of positive charge and negative charge on an amino acid becomes balanced. So, the amino acids are polar compounds.
The reason for insolubility of amino acids in diethyl ether unlike most of the amine and carboxylic acids was explained.
Want to see more full solutions like this?
Chapter 22 Solutions
Organic Chemistry
- Which of the following are true concerning the chemical bond that forms between the carboxyl (RCOOH) group of one amino acid and the amino (RCNH2) group of another? a.The bond is called a peptide bond. b.It is formed by inserting a water molecule between them. c.It is formed by a dehydration reaction. d.A polypeptide has more of these bonds than a protein.arrow_forwardAmino acids can be synthesized by reductive amination. Draw the structure of the organic compound that you would use to synthesize valine.arrow_forwardWhich is true regarding amino acids? This describes a specific molecule with both amine and carboxylic acid functional groups This describes a specific molecule with amine or carboxylic acid functional groups This describes a category of molecules with both amine and carboxylic acid functional groups This describes a category of molecules with amine or carboxylic acid functional groupsarrow_forward
- Draw and name the type of bond that forms between amino and carboxyl groups in peptides.arrow_forwardWhich of the following is/are true? Methionine is an essential amino acid Valine contains two chiral carbons Glycine is an achiral amino acid The alpha-amino group and the alpha-carboxyl group of an amino acid can be neutral at a particular pH.arrow_forwardHow is phenyl isothiocyanate useful in determining protein structure?arrow_forward
- Give at least 5 examples of biological compounds having an amide functional group and identify the biochemical importance of each compound.arrow_forwardExplain why a peptide C-N bond is stronger than an ester C-O bond.arrow_forwardCholesterol is reacted with acidified potassium dichromate. Determine the structure of the product formed and explain if further oxidation can occur.arrow_forward
- Explain the basic principle of the reaction between the amino acid histidine and the ninhydrin reagent.arrow_forwardDescribe the basic structure of phospholipids and glycolipids. What functions do these lipids have in living organisms?arrow_forwardThe structure of ethyl amine and 2-aminoethanoic acid ?arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningOrganic And Biological ChemistryChemistryISBN:9781305081079Author:STOKER, H. Stephen (howard Stephen)Publisher:Cengage Learning,General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage Learning
- Chemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage LearningChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage Learning