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Related Concept Videos

IUPAC Nomenclature of Aldehydes01:16

IUPAC Nomenclature of Aldehydes

Aldehydes are named based on the systematic nomenclature rules set by the IUPAC. For acyclic aldehydes, the longest carbon chain containing the aldehydic (–CHO) group is considered the parent chain. The aldehyde is named by replacing the last letter “e” in the hydrocarbon name with “al”. For instance, a simple, seven-carbon-membered acyclic aldehyde is called heptanal, derived from heptane. The carbon chain is numbered starting from the aldehydic carbon, although the aldehydic carbon’s locant...
Reactions at the Benzylic Position: Oxidation and Reduction00:59

Reactions at the Benzylic Position: Oxidation and Reduction

The benzylic position describes the position of a carbon atom attached directly to a benzene ring. Benzene by itself does not undergo oxidation. In contrast, the benzylic carbon is quite reactive in the presence of strong oxidizing agents such as KMnO4 or H2CrO4. Therefore, alkylbenzenes are readily oxidized to benzoic acid, irrespective of the type of alkyl groups.
NMR Spectroscopy of Benzene Derivatives01:37

NMR Spectroscopy of Benzene Derivatives

Simple unsubstituted benzene has six aromatic protons, all chemically equivalent. Therefore, benzene exhibits only a singlet peak at δ 7.3 ppm in the 1H NMR spectrum. The observed shift is far downfield because the aromatic ring current strongly deshields the protons. Any substitution on the benzene ring makes the aromatic protons nonequivalent, and the protons split each other. The peak is, therefore, no longer a singlet and the splitting pattern and their associated coupling constants depend...
Nomenclature of Carboxylic Acid Derivatives: Acid Halides, Esters, and Acid Anhydrides01:16

Nomenclature of Carboxylic Acid Derivatives: Acid Halides, Esters, and Acid Anhydrides

Naming Acid Halides
The IUPAC and common names of acid halides are derived from the corresponding carboxylic acids, by changing “ic acid” to “yl halide.” For example, as shown below, the IUPAC name ethanoyl chloride is derived from ethanoic acid, and the common name, acetyl chloride, is obtained from acetic acid.
Nomenclature of Aromatic Compounds with Multiple Substituents01:11

Nomenclature of Aromatic Compounds with Multiple Substituents

When more than one substituent is present on the benzene ring, the IUPAC nomenclature depends on the number of substituents present.
For disubstituted benzene derivatives, with two groups attached to the benzene ring, three constitutional isomers are possible. For example, consider dimethyl benzene, often called xylene, where the second methyl group can be substituted at the second, third, or fourth carbon. The relative position of the substituents is represented by prefixes ortho, meta, or...
IUPAC Nomenclature of Ketones01:09

IUPAC Nomenclature of Ketones

Like aldehydes, ketones are named using IUPAC rules; in this case, by replacing “e” in the name of the longest hydrocarbon chain with “one.” In acyclic ketones, the ketonic carbon is given the lowest locant value. For instance, as shown below, a simple five-carbon ketone is named pentan-2-one, instead of pentan-4-one. IUPAC rules also allow the placing of the locant value before the parent name to give an alternate name, 2-pentanone.

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Related Experiment Video

Updated: May 13, 2026

Protocol for the Synthesis of Ortho-trifluoromethoxylated Aniline Derivatives
08:43

Protocol for the Synthesis of Ortho-trifluoromethoxylated Aniline Derivatives

Published on: January 19, 2016

3,5-Bis[(pyridin-4-yl)meth-oxy]benzoic acid.

Hong Lin1, Yi-Ping Zhang

  • 1Jinhua Professional Technical College, No. 1188 Wuzhou Street, Jinhua, Zhejiang 321017, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online
|March 12, 2013
PubMed
Summary

Single crystals of a novel organic compound were synthesized using hydrothermal conditions. The crystal structure reveals nearly planar units linked by hydrogen bonds, forming specific molecular chains.

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Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of &#945;-Imino &#947;-Lactones and Alkylidene Pyrazolones
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Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones

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Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
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Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions

Published on: July 30, 2017

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Last Updated: May 13, 2026

Protocol for the Synthesis of Ortho-trifluoromethoxylated Aniline Derivatives
08:43

Protocol for the Synthesis of Ortho-trifluoromethoxylated Aniline Derivatives

Published on: January 19, 2016

Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of &#945;-Imino &#947;-Lactones and Alkylidene Pyrazolones
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Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones

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Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
19:58

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions

Published on: July 30, 2017

Area of Science:

  • Crystallography
  • Materials Science
  • Organic Chemistry

Background:

  • Understanding the crystal structure of organic compounds is crucial for predicting their properties.
  • Hydrothermal synthesis offers a controlled method for crystal growth.
  • Molecular planarity and intermolecular interactions influence bulk material characteristics.

Purpose of the Study:

  • To synthesize and characterize single crystals of the title compound, C19H16N2O4.
  • To elucidate the crystal structure, including molecular conformation and intermolecular interactions.
  • To investigate the self-assembly behavior of the molecule in the solid state.

Main Methods:

  • Single crystal X-ray diffraction
  • Hydrothermal synthesis
  • Recrystallization

Main Results:

  • Single crystals of C19H16N2O4 were successfully obtained via unintended recrystallization under hydrothermal conditions.
  • The crystal structure analysis revealed a nearly planar [(pyridin-4-yl)methoxy]benzoic acid unit with a dihedral angle of 35.82° between the two main planes.
  • Molecules are organized into chains parallel to [-201] through O-H⋯N hydrogen bonds between the carboxylic acid group and pyridine nitrogen atoms.

Conclusions:

  • The study successfully determined the crystal structure of C19H16N2O4, highlighting its specific molecular geometry.
  • The observed hydrogen bonding pattern dictates the formation of one-dimensional chains, influencing the material's solid-state packing.
  • This structural information provides a foundation for further investigations into the compound's physical and chemical properties.