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Related Concept Videos

Electrophilic Aromatic Substitution: Sulfonation of Benzene01:22

Electrophilic Aromatic Substitution: Sulfonation of Benzene

Sulfonation of benzene is a reaction wherein benzene is treated with fuming sulfuric acid at room temperature to produce benzenesulfonic acid. Fuming sulfuric acid is a mixture of sulfur trioxide and concentrated sulfuric acid.
Amines to Sulfonamides: The Hinsberg Test01:23

Amines to Sulfonamides: The Hinsberg Test

The Hinsberg test is a method to identify primary, secondary and tertiary amines, named after its pioneer, Oscar Hinsberg. Here, amines are treated with benzenesulfonyl chloride, also known as the Hinsberg reagent, in the presence of an excess of aqueous base, followed by acidification. Based on the nature of the amines, different changes are observed.
Generally, a primary amine reacts with the Hinsberg reagent to produce an N-substituted benzenesulfonamide. The electron-withdrawing sulfonyl...
Phase I Reactions: Reductive Reactions01:27

Phase I Reactions: Reductive Reactions

Phase I biotransformation reductive reactions are chemical processes that modify drugs by introducing or revealing polar functional groups via reduction. Enzymes called reductases catalyze these reactions, playing a pivotal role in drug metabolism by transforming lipophilic drugs into more polar, water-soluble metabolites for easy excretion. An essential type of reductive reaction is the carbonyl group reduction, where aldehydes and ketones are reduced to alcohols. An example is the...
Phase II Reactions: Sulfation and Conjugation with α-Amino Acids01:19

Phase II Reactions: Sulfation and Conjugation with α-Amino Acids

Sulfation and α-amino acid conjugation are two critical biotransformation reactions in drug metabolism. Sulfation, a phase II biotransformation reaction, involves adding a polar sulfate group to a drug, enhancing its water solubility and promoting excretion. This process can either co-occur with or occur independently of glucuronidation. Nonmicrosomal sulfotransferase enzymes catalyze the process. The reaction involves 3'-phosphoadenosine-5'-phosphosulfate or PAPS coenzyme activation, sulfur...
Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.
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...

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Crystal structures of three <i>N</i>-acyl-hydrazone isomers.

Acta crystallographica. Section E, Crystallographic communications·2021
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Crystal structures and the Hirshfeld surface analysis of <i>(E)</i>-4-nitro-<i>N</i>'-(<i>o</i>-chloro, <i>o</i>- and <i>p</i>-methyl-benzyl-idene)benzene-sulfono-hydrazides.

Acta crystallographica. Section E, Crystallographic communications·2018
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Crystal structure and Hirshfeld surface analysis of two (<i>E</i>)-<i>N</i>'-(<i>para</i>-substituted benzyl-idene) 4-chloro-benzene-sulfono-hydrazides.

Acta crystallographica. Section E, Crystallographic communications·2018
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Crystal structure and Hirshfeld surface analysis of (<i>E</i>)-<i>N</i>'-[4-(piperidin-1-yl)benzyl-idene]aryl-sulfono-hydrazides.

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Crystal structure and Hirshfeld surface analysis of (<i>Z</i>)-4-chloro-<i>N</i>'-(4-oxo-thia-zol-idin-2-yl-idene)benzene-sulfono-hydrazide monohydrate.

Acta crystallographica. Section E, Crystallographic communications·2018
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Crystal structure and Hirshfeld surface analysis of (<i>E</i>)-<i>N</i>'-benzyl-idene-4-chloro-benzene-sulfono-hydrazide and of its (<i>E</i>)-4-chloro-<i>N</i>'-(<i>ortho</i>- and <i>para</i>-methyl-benzyl-idene)benzene-sulfono-hydrazide derivatives.

Acta crystallographica. Section E, Crystallographic communications·2018

Related Experiment Video

Updated: Jun 1, 2026

Preparation of Contiguous Bisaziridines for Regioselective Ring-Opening Reactions
04:38

Preparation of Contiguous Bisaziridines for Regioselective Ring-Opening Reactions

Published on: July 28, 2022

o-Toluene-sulfonamide: a redetermination.

B Thimme Gowda, Sabine Foro, K Shakuntala

    Acta Crystallographica. Section E, Structure Reports Online
    |May 18, 2011
    PubMed
    Summary
    This summary is machine-generated.

    This study refined the crystal structure of a compound with chemical formula C(7)H(9)NO(2)S. The refined structure reveals a bent amino N-atom and a 3D supramolecular network formed by hydrogen bonds.

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    Preparation of Contiguous Bisaziridines for Regioselective Ring-Opening Reactions
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    Published on: July 28, 2022

    Preparation of N-(2-alkoxyvinyl)sulfonamides from N-tosyl-1,2,3-triazoles and Subsequent Conversion to Substituted Phthalans and Phenethylamines
    10:42

    Preparation of N-(2-alkoxyvinyl)sulfonamides from N-tosyl-1,2,3-triazoles and Subsequent Conversion to Substituted Phthalans and Phenethylamines

    Published on: January 3, 2018

    Area of Science:

    • Crystallography
    • Supramolecular Chemistry
    • Organic Chemistry

    Background:

    • The crystal structure of C(7)H(9)NO(2)S was initially determined using powder diffraction.
    • Previous structural data provided a foundational understanding of the compound's arrangement.

    Purpose of the Study:

    • To refine the crystal structure of C(7)H(9)NO(2)S to a higher precision.
    • To provide a more accurate description of the molecular geometry and intermolecular interactions.

    Main Methods:

    • Single-crystal X-ray diffraction.
    • Structure refinement techniques.
    • Analysis of crystallographic data.

    Main Results:

    • The crystal structure was refined to significantly higher precision than previously reported.
    • A specific C-C-S-N torsion angle of -65.8(2)° was determined for the amino N-atom, indicating a bent geometry.
    • The formation of a three-dimensional framework/supramolecular structure was confirmed.

    Conclusions:

    • The refined crystal structure offers a more precise understanding of C(7)H(9)NO(2)S.
    • Hydrogen bonding between the sulfonamide group and sulfonyl oxygen atoms plays a crucial role in stabilizing the observed 3D supramolecular architecture.