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Related Concept Videos

Diazonium Group Substitution: –OH and –H01:19

Diazonium 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.
Nucleophilic Aromatic Substitution of Aryldiazonium Salts: Aromatic SN101:14

Nucleophilic Aromatic Substitution of Aryldiazonium Salts: Aromatic SN1

Treating arylamines with nitrous acid gives aryldiazonium salts that are effective substrates in nucleophilic aromatic substitution reactions. The diazonio group in these salts can be easily displaced by different nucleophiles, yielding a wide variety of substituted benzenes. The leaving group departs as nitrogen gas, and this easy elimination is the driving force for the substitution reaction.
In the Sandmeyer reaction, for example, the diazonio group is replaced by a chloro, bromo, or cyano...
Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions01:20

Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions

Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene01:13

Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene

Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
Nucleophilic Aromatic Substitution: Elimination–Addition01:11

Nucleophilic Aromatic Substitution: Elimination–Addition

Simple aryl halides do not react with nucleophiles. However, nucleophilic aromatic substitutions can be forced under certain conditions, such as high temperatures or strong bases. The mechanism of substitution under such conditions involves the highly unstable and reactive benzyne intermediate. Benzyne contains equivalent carbon centers at both ends of the triple bond, each of which is equally susceptible to nucleophilic attack. This 50–50 distribution of products is confirmed through isotopic...
Electrophilic Aromatic Substitution: Friedel–Crafts Acylation of Benzene01:11

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.

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Molecules (Basel, Switzerland)·2014
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5-tert-Butyl 3-ethyl 1-isopropyl-4,5,6,7-tetra-hydro-1H-pyrazolo-[4,3-c]pyridine-3,5-dicarboxyl-ate.

Acta crystallographica. Section E, Structure reports online·2011
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(3S,12R,20S,24R)-20,24-Ep-oxy-dammarane-3,12,25-triol.

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6-Benzyl 4-ethyl 2-chloro-5,6,7,8-tetra-hydro-pyrido[4,3-d]pyrimidine-4,6-di-carboxyl-ate.

Acta crystallographica. Section E, Structure reports online·2011
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N-Cyclo-propyl-N-[2-(2,4-difluoro-phen-yl)-2-hy-droxy-1-(1H-1,2,4-triazol-1-yl)prop-yl]-2-(5-methyl-2,4-dioxo-1,2,3,4-tetra-hydro-pyrimidin-1-yl)acetamide dichloro-methane 0.62-solvate.

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Related Experiment Video

Updated: Jun 1, 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

N'-(4-Fluoro-benzyl-idene)acetohydrazide.

Huan-Mei Guo, Li Liu, Jie Yang

    Acta Crystallographica. Section E, Structure Reports Online
    |May 19, 2011
    PubMed
    Summary

    Researchers synthesized a novel fluorinated organic compound, C(9)H(9)FN(2)O, using 4-fluoro-benzophenone and acethydrazide. The study revealed its planar molecular structure and crystal packing facilitated by hydrogen bonds.

    Area of Science:

    • Organic Chemistry
    • Crystallography
    • Supramolecular Chemistry

    Background:

    • Benzophenone derivatives are widely studied for their diverse chemical properties and applications.
    • Hydrazide compounds are crucial building blocks in organic synthesis and medicinal chemistry.
    • Understanding molecular and crystal structures provides insights into material properties and reactivity.

    Purpose of the Study:

    • To synthesize and characterize a novel compound derived from 4-fluoro-benzophenone and acethydrazide.
    • To investigate the molecular geometry and planarity of the synthesized compound.
    • To elucidate the intermolecular interactions and crystal packing of the title compound.

    Main Methods:

    • Chemical synthesis involving the reaction of 4-fluoro-benzophenone with acethydrazide.

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    Preparation and In Vivo Use of an Activity-based Probe for N-acylethanolamine Acid Amidase
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    Preparation and In Vivo Use of an Activity-based Probe for N-acylethanolamine Acid Amidase

    Published on: November 23, 2016

    Modification and Functionalization of the Guanidine Group by Tailor-made Precursors
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    Modification and Functionalization of the Guanidine Group by Tailor-made Precursors

    Published on: April 27, 2017

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    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

    Preparation and In Vivo Use of an Activity-based Probe for N-acylethanolamine Acid Amidase
    11:01

    Preparation and In Vivo Use of an Activity-based Probe for N-acylethanolamine Acid Amidase

    Published on: November 23, 2016

    Modification and Functionalization of the Guanidine Group by Tailor-made Precursors
    09:45

    Modification and Functionalization of the Guanidine Group by Tailor-made Precursors

    Published on: April 27, 2017

  • Single-crystal X-ray diffraction analysis to determine molecular and crystal structure.
  • Analysis of bond lengths, bond angles, and intermolecular interactions (hydrogen bonding).

    • Main Results:

    • Successful synthesis of the title compound, C(9)H(9)FN(2)O.
    • Determination of a nearly planar molecular conformation with a root-mean-square deviation of 0.065(2) Å for non-hydrogen atoms.
    • Identification of centrosymmetric dimers formed by pairs of intermolecular N-H⋯O hydrogen bonds in the crystal lattice.

    Conclusions:

    • The synthesized compound exhibits a planar molecular structure, which can influence its electronic and photophysical properties.
    • Intermolecular hydrogen bonding plays a significant role in organizing the molecules within the crystal structure, forming dimers.
    • This study contributes to the understanding of structure-property relationships in fluorinated organic compounds and hydrazide derivatives.