Related Experiment Video

Updated: Jun 1, 2026

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

Undeca-carbonyl-1κC,2κC,3κC-{tris-[4-(methyl-sulfanyl)-phen-yl]arsine-1κAs}-triangulo-triruthenium(0)

Omar Bin Shawkataly, Imthyaz Ahmed Khan, Siti Syaida Sirat

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

    More Related Videos

    The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes10:51

    The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes

    Published on: April 10, 2015

    Isolating Free Carbenes, their Mixed Dimers and Organic Radicals10:44

    Isolating Free Carbenes, their Mixed Dimers and Organic Radicals

    Published on: April 19, 2019

    Related Concept Videos

    ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH301:11

    ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH3

    All ortho–para directors, excluding halogens, are activating groups. These groups donate electrons to the ring, making the ring carbons electron-rich. Consequently, the reactivity of the aromatic ring towards electrophilic substitution increases. For instance, the nitration of anisole is about 10,000 times faster than the nitration of benzene. The electron-donating effect of the methoxy group in anisole activates the ortho and para positions on the ring and stabilizes the corresponding...
    meta-Directing Deactivators: –NO2, –CN, –CHO, –⁠CO2R, –COR, –CO2H01:13

    meta-Directing Deactivators: –NO2, –CN, –CHO, –⁠CO2R, –COR, –CO2H

    All meta-directing substituents are deactivating groups. These substituents withdraw electrons from the aromatic ring, making the ring less reactive toward electrophilic substitution. For example, the nitration of nitrobenzene is 100,000 times slower than that of benzene because of the deactivating effect of the nitro group. The first step in an electrophilic aromatic substitution is the addition of an electrophile to form a resonance-stabilized carbocation. The energy diagrams for the...
    Aromatic Hydrocarbon Cations: Structural Overview01:18

    Aromatic Hydrocarbon Cations: Structural Overview

    Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
    Removing one hydrogen from the intervening CH2 group with both...
    Radicals: Electronic Structure and Geometry01:07

    Radicals: Electronic Structure and Geometry

    This lesson delves into the geometry of a radical, which is influenced by the electronic structure of the molecule. The principle is similar to that of a lone pair, where the unpaired electron influences the geometry at the radical center.
    Accordingly, the structure of a trivalent radical lies between the geometries of carbocations and carbanions. An sp2-hybridized carbocation is trigonal planar, while an sp3-hybridized carbanion is trigonal pyramidal. Here, the difference in geometry is...
    [3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement01:21

    [3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement

    The Cope rearrangement is classified as a [3,3] sigmatropic shift in 1,5-dienes, leading to a more stable, isomeric 1,5-diene. The reaction involves a concerted movement of six electrons, four from two π bonds and two from a σ bond, via an energetically favorable chair-like transition state.
    Carbocations02:10

    Carbocations

    Carbocations are one of the reaction intermediates formed during several nucleophilic substitutions or elimination reactions. A carbocation is an electron-deficient species with the central carbon atom having six electrons and three bonded atoms. The central carbon in a carbocation is sp2 hybridized with trigonal planar geometry. It has an empty p orbital perpendicular to the plane of the structure that can accept electrons. Thus, carbocations act as strong electrophiles and may react with any...