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Updated: Jun 1, 2026
08:43
Protocol for the Synthesis of Ortho-trifluoromethoxylated Aniline Derivatives
Published on: January 19, 2016
N-[Bis(4-fluoro-phen-yl)methyl-ene]aniline
Summary
Researchers synthesized a novel fluorinated organic compound, C(19)H(13)F(2)N, using a straightforward addition reaction. Crystal analysis revealed specific dihedral angles and intermolecular hydrogen bonding, forming zigzag chains in the solid state.
Area of Science:
- Organic Chemistry
- Crystallography
- Materials Science
Background:
- Fluorinated organic compounds possess unique electronic and physical properties.
- Understanding molecular geometry and crystal packing is crucial for predicting material behavior.
Purpose of the Study:
- To synthesize and characterize a novel difluorinated organic compound.
- To investigate the molecular structure, including dihedral angles between aromatic rings.
- To analyze the intermolecular interactions and crystal packing.
Main Methods:
- Synthesis via nucleophilic addition reaction between bis-(4-fluoro-phen-yl)methanone and aniline.
- Single-crystal X-ray diffraction for structural determination.
- Analysis of dihedral angles and hydrogen bonding interactions.
Main Results:
- Successful synthesis of the target compound C(19)H(13)F(2)N.
- Determination of significant dihedral angles (81.04° and 64.15°) between fluoro-benzene and aniline rings.
- Identification of intermolecular C-H⋯F hydrogen bonds facilitating zigzag chain formation in crystal packing.
Conclusions:
- The synthesized compound exhibits a distinct non-planar molecular geometry.
- Intermolecular C-H⋯F hydrogen bonds play a key role in the supramolecular architecture.
- The study provides insights into the structure-property relationships of fluorinated diarylmethanes.
Related Concept Videos
01:10Nomenclature of Aryl and Heterocyclic Amines
The simplest aromatic amine is phenylamine, which contains an –NH2 functionality directly attached to an aromatic ring. The name aniline is designated for this skeleton. As shown in Figure 1, the common names of the functionalized anilines involve prefixes ortho-, meta-, and para- to indicate the substitution position. Different functionalized aniline derivatives also have notable trivial names.
01:19Diazonium Group Substitution: –OH and –H
Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
01:17Nomenclature of Primary Amines
Primary, secondary, and tertiary amines are compounds consisting of one, two, and three alkyl groups connected to the amino group (–NH2), respectively. As depicted in Figure 1, the common name of the primary amines is obtained by adding the suffix -amine to the alkyl substituent attached to the amino group as the corresponding alkylamine.
01:18Basicity of Aromatic Amines
The basicity of aromatic amines is much weaker than that of aliphatic amines due to the involvement of the lone pair of electrons over the N atom in resonance with the aryl rings. Generally, the electron-donating ability of any substituents on the aryl ring of aromatic amines increases the basicity of the amine by increasing electron density, and hence the availability of lone pair on the nitrogen. On the other hand, electron-withdrawing functional groups on the aryl ring of amines decrease the...
01:28Preparation 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...
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...
01:26Physical Properties of Amines
Amines with low molecular weight are usually gaseous at room temperature, while those with high molecular weight are liquid or solids in nature. Usually, low molecular weight amines have a rotten fish-like smell. Diamines typically have a pungent smell. For instance, cadaverine and putrescine, depicted in Figure 1, are two molecules responsible for decaying tissue.