Textbook Question
Draw the structures of the following compounds. (Includes both new and old names.)
i. cyclopent-3-ene-1-thiol
j. dimethyl disulfide
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12. Alcohols, Ethers, Epoxides and Thiols
Naming Thiols
Problem 7e
Textbook Question
Draw the structure that corresponds to the name provided.
(e) (1S,4S)-4-isopropylcyclopent-2-enethiol
Verified step by step guidance1
Start by identifying the main structure: cyclopent-2-ene. This indicates a cyclopentane ring with a double bond between the second and third carbon atoms.
Next, consider the stereochemistry indicated by (1S,4S). This means that the first and fourth carbon atoms in the ring have specific stereochemistry. Use wedge and dash bonds to represent these stereocenters, with 'S' indicating the counterclockwise arrangement of substituents when viewed from the front.
Add the isopropyl group to the fourth carbon atom. An isopropyl group is a branched alkyl group with the formula \( \text{C}_3\text{H}_7 \), typically represented as \( \text{-CH(CH}_3\text{)}_2 \). Attach this group to the fourth carbon, considering the stereochemistry.
Include the thiol group (\( \text{-SH} \)) on the second carbon atom. Thiol groups are similar to alcohols but contain sulfur instead of oxygen. Ensure the thiol group is correctly positioned relative to the double bond.
Verify the structure by checking the placement of all groups and the stereochemistry. Ensure that the double bond, isopropyl group, and thiol group are correctly positioned according to the IUPAC name provided.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Stereochemistry
Stereochemistry involves the study of the spatial arrangement of atoms in molecules and its impact on chemical properties. In this context, the (1S,4S) notation indicates the specific 3D orientation of the substituents on the cyclopentene ring, which is crucial for accurately drawing the molecule's structure.
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IUPAC Nomenclature
IUPAC nomenclature is a standardized system for naming chemical compounds. Understanding this system is essential for interpreting the name '4-isopropylcyclopent-2-enethiol,' which describes the molecule's structure, including the cyclopentene ring, the isopropyl group at position 4, and the thiol group at position 2.
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Functional Groups
Functional groups are specific groups of atoms within molecules that determine the chemical reactivity and properties of those molecules. In this case, the thiol group (-SH) is a key functional group that must be correctly positioned on the cyclopentene ring to accurately represent the compound's structure.
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