Problem 2 Write structures of the compound... [FREE SOLUTION]

Chapter 11: Problem 2

Write structures of the compounds whose IUPAC names are as follows: (i) 2-Methylbutan-2-ol (ii) 1 -Phenylpropan-2-ol (iii) 3,5 -Dimethylhexane \(-1,3,5\) -triol (iv) \(2,3-\) Diethylphenol (v) 1 - Ethoxypropane (vi) 2-Ethoxy-3-methylpentane vii) Cyclohexylmethanol (viii) 3-Cyclohexylpentan-3-ol (ix) Cyclopent-3-en-1-ol (x) 4-Chloro-3-ethylbutan-1-ol.

Short Answer

Expert verified

Draw the structures as described for each IUPAC name, following the carbon logic and functional groups.

Step by step solution

Draw 2-Methylbutan-2-ol

Start with the butane backbone, which has 4 carbon atoms. At carbon 2, add a methyl group (CH3). At the same carbon, place the hydroxyl group (OH), making it an alcohol.

Sketch 1-Phenylpropan-2-ol

Begin with a propane chain (3 carbon atoms). At carbon 1, attach a phenyl group (C6H5). At carbon 2, add a hydroxyl group (OH).

Construct 3,5-Dimethylhexane-1,3,5-triol

Create a hexane chain of 6 carbons. Add two methyl groups on carbons 3 and 5. Place hydroxyl groups (OH) on carbons 1, 3, and 5.

Illustrate 2,3-Diethylphenol

Start with a phenol ring (benzene with an OH group on carbon 1). Attach ethyl groups (CH2CH3) on carbon 2 and 3 of the benzene ring.

Develop 1-Ethoxypropane

Make a propane chain (3 carbons) and connect an ethoxy group (CH3CH2O-) to carbon 1.

Outline 2-Ethoxy-3-methylpentane

Draw a pentane chain (5 carbons). Attach an ethoxy group (CH3CH2O-) to carbon 2 and a methyl group (CH3) to carbon 3.

Depict Cyclohexylmethanol

Draw a cyclohexane ring (6 carbon ring) and attach a methanol group (CH2OH) to it.

Formulate 3-Cyclohexylpentan-3-ol

Create a pentane backbone (5 carbons). Attach a cyclohexyl group (a cyclohexane ring) to carbon 3 and also place an OH group on the same carbon.

Visualize Cyclopent-3-en-1-ol

Sketch a cyclopentene ring (a 5-carbon ring with a double bond between carbons 3 and 4). Attach a hydroxyl group to carbon 1.

Design 4-Chloro-3-ethylbutan-1-ol

Start with a butane chain (4 carbons). At carbon 1, add an OH group; at carbon 3, add an ethyl group (CH2CH3); and at carbon 4, add a chlorine atom (Cl).

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Organic Compounds

Organic compounds are primarily made up of carbon and hydrogen atoms. They can also include other elements such as oxygen, nitrogen, and halogens. These compounds are classified based on their carbon backbone and functional groups.

The carbon backbone determines the basic structure:

Alkanes: Saturated hydrocarbons with single carbon-carbon bonds.
Alkenes: Unsaturated hydrocarbons with at least one double bond.
Alkynes: Unsaturated hydrocarbons with at least one triple bond.
Aromatic: Compounds containing benzene rings, such as phenols.

The presence of functional groups like hydroxyl (-OH) and ethoxy (C2H5O-) imparts specific chemical properties. These functional groups are crucial for IUPAC nomenclature since they affect the compound's reactivity and interaction with other molecules.

Alcohol Structures

Alcohols are organic compounds featuring one or more hydroxyl (OH) groups, which are attached to the carbon atoms of the hydrocarbon chain. The classification of alcohols can be based on the number of hydroxyl groups:

Monohydric alcohols: Contain one OH group.
Dihydric alcohols: Contain two OH groups.
Trihydric alcohols: Contain three OH groups, such as in "3,5-Dimethylhexane-1,3,5-triol."

The location of the hydroxyl group contributes to the alcohol's classification:

Primary alcohols: OH group attached to a terminal carbon.
Secondary alcohols: OH group connected to a carbon atom that is attached to two other carbon atoms.
Tertiary alcohols: OH group bound to a carbon atom connected to three carbon atoms.

The position of the hydroxyl group is essential for accurately naming an alcohol according to IUPAC conventions. The carbon closest to the functional group is given the lowest possible number in the carbon chain.

Chemical Structure Drawing

Chemical structure drawing involves visualizing and representing the arrangement of atoms within a molecule. Accurate drawing is critical for understanding molecular geometry and interactions. Start with a clear understanding of IUPAC names, which guide the structure. To draw a chemical structure:

Identify the longest carbon chain (or ring) indicated in the name.
Number the carbon atoms to provide the lowest possible numbers for substituents or functional groups.
Arrange substituents such as methyl (CH3), ethyl (C2H5), and phenyl (C6H5) groups according to their designated positions in the name.
Include functional groups like hydroxyl (OH), chloro (Cl), or ethoxy (C2H5O-) based on their priority in IUPAC nomenclature.

Visual tools such as wedge-dash notations can illustrate 3D orientations, showing whether substituents are above or below the plane of the carbon backbone. Correct structure drawing enhances the understanding of molecular properties and reactivity.

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Short Answer

Step by step solution

Draw 2-Methylbutan-2-ol

Sketch 1-Phenylpropan-2-ol

Construct 3,5-Dimethylhexane-1,3,5-triol

Illustrate 2,3-Diethylphenol

Develop 1-Ethoxypropane

Outline 2-Ethoxy-3-methylpentane

Depict Cyclohexylmethanol

Formulate 3-Cyclohexylpentan-3-ol

Visualize Cyclopent-3-en-1-ol

Design 4-Chloro-3-ethylbutan-1-ol

Key Concepts

Organic Compounds

Alcohol Structures

Chemical Structure Drawing

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