Textbook Question
Show how you would accomplish the following conversions.
c. trans-hex-3-ene to meso-hexane-3,4-diol
1349
views
Ch.8 - Reactions of Alkenes
Wade9th EditionOrganic ChemistryISBN: 9780135213728
Not the one you use?Change textbookSelect a different textbook
Table of contents
- Ch.1 - Structure and Bonding107
- Ch. 2 - Acids and Bases; Functional Groups115
- Ch.3 - Structure and Stereochemistry of Alkanes100
- Ch.4 - The Study of Chemical Reactions99
- Ch.5 - Stereochemistry93
- Ch.6 - Alkyl Halides; Nucleophilic Substitution118
- Ch. 7 - Structure and Synthesis of Alkenes; Elimination158
- Ch.8 - Reactions of Alkenes171
- Ch.9 - Alkynes91
- Ch.10 - Structure and Synthesis of Alcohols143
- Ch.11 - Reactions of Alcohols104
- Ch. 12 - Infrared Spectroscopy and Mass Spectrometry22
- Ch. 13 - Nuclear Magnetic Resonance Spectroscopy45
- Ch. 14 - Ethers, Epoxides, and Thioethers72
- Ch. 15 - Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy89
- Ch. 16 - Aromatic Compounds74
- Ch. 17 - Reactions of Aromatic Compounds126
- Ch. 18 - Ketones and Aldehydes193
- Ch. 19 - Amines129
- Ch. 20 - Carboxylic Acids77
- Ch. 21 - Carboxylic Acid Derivatives141
- Ch. 22 - Condensations and Alpha Substitutions of Carbonyl Compounds175
- Ch. 23 - Carbohydrates and Nucleic Acids93
- Ch. 24 - Amino Acids, Peptides, and Proteins54
Chapter 8, Problem 35d
Show how you would accomplish the following conversions.
d. trans-hex-3-ene to (d,l)-hexane-3,4-diol
Verified step by step guidance1
Step 1: Recognize that the conversion involves adding hydroxyl groups (-OH) to the trans-hex-3-ene molecule. This is a dihydroxylation reaction, which typically converts an alkene into a vicinal diol (two hydroxyl groups on adjacent carbons).
Step 2: Select an appropriate reagent for syn-dihydroxylation. Common reagents include osmium tetroxide (OsO₄) with a co-oxidant like N-methylmorpholine N-oxide (NMO) or potassium permanganate (KMnO₄) under mild conditions. These reagents add hydroxyl groups to the double bond in a syn fashion.
Step 3: Consider the stereochemistry of the product. Since the starting material is trans-hex-3-ene, the addition of hydroxyl groups will result in a meso compound or a racemic mixture (d,l) of hexane-3,4-diol, depending on the reaction conditions. Ensure the reaction conditions favor the formation of the desired stereoisomer.
Step 4: Write the mechanism for the reaction. The alkene undergoes coordination with the reagent (e.g., OsO₄), forming a cyclic intermediate. This intermediate is then hydrolyzed to yield the vicinal diol. Use MathML to represent the chemical structures and reaction mechanism.
Step 5: Verify the product structure. The final product, (d,l)-hexane-3,4-diol, should have hydroxyl groups on carbons 3 and 4, with the stereochemistry reflecting the racemic mixture. Confirm that the reaction conditions and reagents used align with the desired outcome.
Verified video answer for a similar problem:
This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
2mWas this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Alkenes and Their Reactions
Alkenes are hydrocarbons that contain at least one carbon-carbon double bond. They are reactive compounds that can undergo various reactions, such as hydrogenation, hydrohalogenation, and hydration. Understanding the reactivity of alkenes is crucial for converting trans-hex-3-ene into other functional groups, as these reactions will dictate the pathway to the desired product.
Recommended video:
2:09
Alkene Metathesis Concept 1
Stereochemistry
Stereochemistry is the study of the spatial arrangement of atoms in molecules and how this affects their chemical behavior. In the conversion of trans-hex-3-ene to (d,l)-hexane-3,4-diol, it is important to consider the stereochemical configuration of the product, as it contains chiral centers. Recognizing the stereochemical implications of reactions helps in predicting the formation of specific isomers.
Recommended video:
1:38Polymer Stereochemistry Concept 1
Diol Formation
Diols, or glycols, are compounds containing two hydroxyl (-OH) groups. The conversion of alkenes to diols typically involves syn or anti-dihydroxylation reactions, where the addition of hydroxyl groups occurs across the double bond. Understanding the mechanisms of diol formation is essential for successfully synthesizing (d,l)-hexane-3,4-diol from trans-hex-3-ene, as it determines the regioselectivity and stereochemistry of the final product.
Recommended video:
Guided course
02:26Formation of Enolates
Related Practice
Textbook Question
Show how you would accomplish the following conversions.
b. cis-hex-3-ene to (d,l)-hexane-3,4-diol
1560
views
Textbook Question
Give structures of the alkenes that would give the following products upon ozonolysis–reduction.
(a)
2033
views
Textbook Question
Give structures of the alkenes that would give the following products upon ozonolysis–reduction.
(b)
1680
views
Textbook Question
Give structures of the alkenes that would give the following products upon ozonolysis–reduction.
(c)
681
views
Textbook Question
Show how you would accomplish the following conversions.
a. cis-hex-3-ene to meso-hexane-3,4-diol
1194
views