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Magazine Chapter 24: Problem 48
Draw structures corresponding to the following IUPAC names: (a) \(N, N\) -Dimethylaniline (b) (Cyclohexylmethyl)amine (c) \(N\) -Methylcyclohexylamine (d) (2-Methylcyclohexyl)amine (e) 3 - \((N, N\) -Dimethylamino)propanoic acid
Short Answer
Expert verified
Construct structures based on functional group placements specified in names.
Step by step solution
01
Understanding N, N-Dimethylaniline
N, N-Dimethylaniline consists of an aniline group, which is a benzene ring attached to an amine group. In this case, the nitrogen is substituted with two methyl groups (CH3). Draw a benzene ring, attach a nitrogen (amine) group, and then attach two methyl groups to the nitrogen.
02
Drawing (Cyclohexylmethyl)amine
Start with a cyclohexane ring, which is hexagonal and consists of six carbon atoms. To form cyclohexylmethylamine, attach a CH2 group (methyl) to one position of the cyclohexane ring, and then attach an NH2 group (amine) to that CH2 group.
03
Constructing N-Methylcyclohexylamine
Begin with a cyclohexane ring. Attach an NH2 group (amine) directly to one of the carbon atoms on the ring. Then, add a methyl group (CH3) to the nitrogen, creating an N-methylamine group attached to cyclohexane.
04
Drawing 2-Methylcyclohexylamine
Start with a six-carbon cyclohexane ring. Number the carbon atoms in the ring. Attach a methyl group (CH3) to the second carbon, and an NH2 group directly to the third or any single carbon if unspecified to represent the amine structure.
05
Understanding 3-(N, N-Dimethylamino)propanoic acid
This compound involves a three-carbon propane backbone. At the third carbon, attach an N,N-dimethylamino group, which has a nitrogen with two methyl groups. Finally, attach a carboxylic acid group (COOH) to the first carbon of the propane chain.
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
N, N-Dimethylaniline structure
Understanding the structure of N, N-Dimethylaniline is crucial in organic chemistry, particularly in the field of aromatic compounds. N, N-Dimethylaniline is an aniline derivative. Aniline itself is a benzene ring bonded to an amine group \((\text{-NH}_2)\). In N, N-Dimethylaniline, the nitrogen atom of the amine group is bonded not only to the benzene ring but also to two methyl groups \((\text{-CH}_3)\), making it a tertiary amine. To visualize or draw this structure:
- Start with a regular benzene ring, which is a hexagonal ring consisting of six carbon atoms, with alternating double bonds.
- Next, attach a nitrogen atom directly to the benzene ring to form the aniline base.
- Finally, add two methyl groups \((\text{-CH}_3)\) to the nitrogen.
Cyclohexylmethylamine structure
Cyclohexylmethylamine is an intriguing amine as it combines the cyclohexane ring structure with a methylamine group attached. This structure reflects both aliphatic and aromatic properties.
- Start with the cyclohexane ring, which is a six-carbon ring forming a stable hexagonal shape due to sp\(^3\) carbon hybridization.
- Attach a methyl group \((\text{-CH}_2)\) to one of the carbon atoms in the cyclohexane ring.
- Then, link an amine group \((\text{-NH}_2)\) to this methyl group. In essence, the \(\text{CH}_2\) bridge links the cyclohexane ring with the amine group.
N-Methylcyclohexylamine structure
The structure of N-Methylcyclohexylamine incorporates both the cyclohexane ring and a methyl amine substitution. This structure helps to demonstrate typical secondary amine characteristics.
- Begin with the cyclohexane ring, which should consist of six carbon atoms forming a nearly planar hexagon.
- Directly attach an amine \((\text{-NH}_2)\) group to one of the carbons on the cyclohexane structure.
- Add a methyl \((\text{-CH}_3)\) group to the nitrogen in the amine section-forming N-Methylated amine.
2-Methylcyclohexylamine structure
The 2-Methylcyclohexylamine structure is essential for understanding the impact of positional isomerism in cycloalkanes. This compound highlights how substitution position affects chemical properties.
- Construct a cyclohexane ring, noting its flexibility and chair-like conformation.
- Identify the second carbon on the ring; often, numbering starts at the most substituted carbon.
- On this second carbon, attach a methyl group \((\text{-CH}_3)\). This reflects a positional isomer of a methylation.
- Attach an amine group \((\text{-NH}_2)\) directly to one of the carbons in the ring, more commonly to an adjacent carbon when unspecified.
3-(N, N-Dimethylamino)propanoic acid structure
The chemical structure of 3-(N, N-Dimethylamino)propanoic acid involves the combination of an amino group with a carboxylic acid on a propane chain, demonstrating the multifunctionality of organic compounds.
- Start with a straight chain of three carbon atoms to form the propane backbone.
- On the third carbon atom, attach a nitrogen atom that is further bonded to two methyl groups \((\text{-CH}_3)\), forming the dimethylamino group.
- Attach a carboxylic acid group \((\text{-COOH})\) to the first carbon in the chain.
