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Nomenclature of Carboxylic Acid Derivatives: Amides and Nitriles

Nomenclature of Carboxylic Acid Derivatives: Amides and Nitriles

Naming Amides
The IUPAC and common names of amides are derived from the parent carboxylic acid, by replacing the suffix “oic acid” and “ic acid,” respectively, with “amide.” In the following example, the IUPAC name ethanamide is derived from ethanoic acid, and the common name, acetamide, is obtained from acetic acid.

Amines to Amides: Acylation of Amines

Amines to Amides: Acylation of Amines

Various carboxylic acid derivatives (such as acid chlorides, esters, and anhydrides) can be used for the acylation of amines to yield amides. The reaction requires two equivalents of amines. The first amine molecule functions as a nucleophile and attacks the carbonyl carbon to produce a tetrahedral intermediate. This is followed by the loss of the leaving group and restoration of the C=O bond.
Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary amide...

Acid Halides to Amides: Aminolysis

Acid Halides to Amides: Aminolysis

Aminolysis is a nucleophilic acyl substitution reaction, where ammonia or amines act as nucleophiles to give the substitution product. Acid halides react with ammonia, primary amines, and secondary amines to yield primary, secondary, and tertiary amides, respectively.
In the first step of the aminolysis mechanism, the amine attacks the carbonyl carbon of the acyl chloride to form a tetrahedral intermediate. In the second step, the carbonyl group is re-formed with the elimination of a chloride...

Preparation of 1° Amines: Gabriel Synthesis

Preparation of 1° Amines: Gabriel Synthesis

Direct alkylation is not a suitable method for synthesizing amines because it produces polyalkylated products. Gabriel synthesis is the most preferred method to exclusively make primary amines. The method uses phthalimide, which contains a protected form of nitrogen that participates in alkylation only once to predominantly give primary amines.
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...

Electrophilic Aromatic Substitution: Friedel–Crafts Acylation of Benzene

Electrophilic Aromatic Substitution: Friedel–Crafts Acylation of Benzene

The Friedel–Crafts acylation reactions involve the addition of an acyl group to an aromatic ring. These reactions proceed via electrophilic aromatic substitution by employing an acyl chloride and a Lewis acid catalyst such as aluminum chloride to form aryl ketone.

Preparation of Amides

Preparation of Amides

Amides are synthesized by treating carboxylic acids with amines in the presence of dehydrating agents like dicyclohexylcarbodiimide (DCC).
The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent.
Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...

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Related Experiment Video

Updated: Jun 5, 2026

Protocol for the Synthesis of Ortho-trifluoromethoxylated Aniline Derivatives

Protocol for the Synthesis of Ortho-trifluoromethoxylated Aniline Derivatives

Published on: January 19, 2016

2-Chloro-N-(4-fluoro-phen-yl)acetamide.

Si-Shun Kang¹, Hai-Su Zeng, Hai-Lin Li

¹College of Science, Nanjing University of Technology, Xinmofan Road No. 5 Nanjing, Nanjing 210009, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online

|January 5, 2011

Summary

This study reveals the crystal structure of a novel compound, highlighting intramolecular hydrogen bonding that forms a six-membered ring. Molecules further assemble into infinite chains via intermolecular hydrogen bonds.

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Area of Science:

Crystallography
Supramolecular Chemistry
Organic Chemistry

Background:

Understanding molecular interactions is crucial in chemistry.
Hydrogen bonds play a significant role in molecular assembly and material properties.

Purpose of the Study:

To elucidate the crystal structure of the title compound C(8)H(7)ClFNO.
To investigate the types and arrangements of hydrogen bonds within the crystal lattice.

Main Methods:

Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
Analysis of intermolecular and intramolecular interactions was performed.

Main Results:

The crystal structure of C(8)H(7)ClFNO was successfully determined.
An intramolecular C-H⋯O hydrogen bond was identified, forming a stable six-membered ring.
Intermolecular N-H⋯O hydrogen bonds link molecules into infinite chains along the c-axis.

Conclusions:

The compound C(8)H(7)ClFNO exhibits unique hydrogen bonding patterns.
These interactions dictate the supramolecular architecture, leading to chain formation in the solid state.