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Ch. 19 - Amines
Wade - Organic Chemistry 9th Edition
Wade9th EditionOrganic ChemistryISBN: 9780135213728당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Wade 9th EditionCh. 19 - Amines문제 2a,b,c
19장, 문제 2a,b,c

Draw the structures of the following compounds:
(a) tert-butylamine
(b) α-aminopropionaldehyde
(c) 4-(dimethylamino)pyridine

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1
Step 1: Understand the structure of tert-butylamine. The 'tert-butyl' group is a branched alkyl group with the formula (CH₃)₃C-. Attach an amine group (-NH₂) to the central carbon of the tert-butyl group. The resulting structure is (CH₃)₃C-NH₂.
Step 2: Analyze the structure of α-aminopropionaldehyde. The term 'α-amino' indicates that an amine group (-NH₂) is attached to the carbon adjacent to the aldehyde group (-CHO). Start with propionaldehyde (CH₃-CH₂-CHO), and add an amine group to the α-carbon (the carbon next to the aldehyde group).
Step 3: Break down the name 4-(dimethylamino)pyridine. Pyridine is a six-membered aromatic ring containing one nitrogen atom. The '4-' indicates that the substituent is attached to the fourth carbon relative to the nitrogen. The 'dimethylamino' group is -N(CH₃)₂, which is a nitrogen atom bonded to two methyl groups. Attach this group to the fourth carbon of the pyridine ring.
Step 4: Draw the structures for each compound based on the descriptions above. For tert-butylamine, draw a central carbon atom bonded to three methyl groups and one amine group. For α-aminopropionaldehyde, draw a three-carbon chain with an aldehyde group at one end and an amine group on the α-carbon. For 4-(dimethylamino)pyridine, draw a pyridine ring with a dimethylamino group attached to the fourth carbon.
Step 5: Verify the structures by checking that all valencies are satisfied and that the functional groups are correctly placed as per the IUPAC names provided in the problem.

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주요 개념

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Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. In organic chemistry, recognizing functional groups such as amines, aldehydes, and others is crucial for understanding the properties and reactivity of compounds. For example, tert-butylamine contains an amine group, which influences its basicity and solubility.
추천 영상:
02:36
Identifying Functional Groups

Structural Representation

Structural representation refers to the way in which the arrangement of atoms in a molecule is depicted. This can include Lewis structures, condensed formulas, or skeletal structures. Accurately drawing these structures is essential for visualizing molecular geometry and understanding how different atoms are connected, which is vital for compounds like a-aminopropionaldehyde and 4-(dimethylamino)pyridine.
추천 영상:
05:09
Representations of L-Configuration

Isomerism

Isomerism is the phenomenon where compounds with the same molecular formula can have different structures or arrangements of atoms. This concept is important when drawing organic compounds, as different isomers can exhibit distinct physical and chemical properties. For instance, the presence of different substituents in 4-(dimethylamino)pyridine can lead to various isomeric forms, affecting their reactivity and interactions.
추천 영상:
06:47
Monosaccharides - D and L Isomerism
관련 실천
교과서 질문

Determine which of the heterocyclic amines just shown are aromatic. Give the reasons for your conclusions.

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교과서 질문

Which of the amines listed next is resolved into enantiomers? In each case, explain why interconversion of the enantiomers does or does not take place.

(a) cis-2-methylcyclohexanamine 

(b) N-ethyl-N-methylcyclohexanamine 

(c) N-methylaziridine 

(d) ethylmethylanilinium iodide

(e) methylethylpropylisopropylammoniumiodide

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교과서 질문

Give correct names for the following amines:

(a)

(b)

(c)

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교과서 질문

Draw the structures of the following compounds:

(d) 2-methylaziridine

(e) N-ethyl-N-methylhexan-3-amine

(f) m-chloroaniline

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