Related Experiment Video

Updated: Jun 5, 2026

Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
07:12

Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions

Published on: July 17, 2020

2,8-Dichloro-6H,12H-5,11-ethano-dibenzo[b,f][1,5]diazo-cine

Masoud Faroughi, Andrew C Try, Peter Turner

    Acta Crystallographica. Section E, Structure Reports Online
    |January 5, 2011
    PubMed

    More Related Videos

    Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones10:17

    Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones

    Published on: February 7, 2019

    Continuous Flow Chemistry: Reaction of Diphenyldiazomethane with p-Nitrobenzoic Acid07:06

    Continuous Flow Chemistry: Reaction of Diphenyldiazomethane with p-Nitrobenzoic Acid

    Published on: November 15, 2017

    Related Concept Videos

    Carboxylic Acids to Methylesters: Alkylation using Diazomethane01:33

    Carboxylic Acids to Methylesters: Alkylation using Diazomethane

    Carboxylic acids react with diazomethane in an ether solvent via alkylation at the carboxylate oxygen atom to give methyl esters of the corresponding acid with excellent yields.
    [4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction01:16

    [4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction

    The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
    Disubstituted Cyclohexanes: cis-trans Isomerism02:37

    Disubstituted Cyclohexanes: cis-trans Isomerism

    Depending upon the different spatial orientation of the substituents, the disubstituted cycloalkanes exhibit two types of stereoisomers. The cis isomers have the substituents on the same side of the ring, whereas the trans isomers have the substituents on the opposite sides. These stereoisomers exhibit different physical properties and cannot be interconverted without breaking the carbon-carbon bonds.
    In cyclohexane, the substituents can occupy different positions generating distinct isomers.
    UV–Vis Spectroscopy: Woodward–Fieser Rules01:29

    UV–Vis Spectroscopy: Woodward–Fieser Rules

    UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given structure by adding the contributions...
    Structure of Conjugated Dienes01:16

    Structure of Conjugated Dienes

    Introduction
    Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...
    Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry01:29

    Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry

    Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.