関連する実験動画

Updated: Jul 11, 2026

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
12:08

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes

Published on: June 24, 2022

f + h2反応の移行状態である

D E Manolopoulos, K Stark, H J Werner

    Science (New York, N.Y.)
    |December 17, 1993
    PubMed
    まとめ

    研究者は,FHの光電子スペクトロスコピーを用いてF + H (((2)) 反応の移行状態を研究した. 理論と実験の間の正確な合意は,この反応の定量的な理解を提供します.

    さらに関連する動画

    Hydrogen Production and Utilization in a Membrane Reactor10:00

    Hydrogen Production and Utilization in a Membrane Reactor

    Published on: March 10, 2023

    関連する概念動画

    Transition State Theory01:25

    Transition State Theory

    Transition-state theory, also known as activated-complex theory, provides a molecular-level explanation of reaction rates in both gas-phase and solution-phase reactions. It extends earlier kinetic models by considering the formation of a short-lived, high-energy configuration during a reaction.The progress of a chemical reaction can be represented using a reaction profile, which plots potential energy against the reaction coordinate. As two reactant molecules approach one another, their...
    SN2 Reaction: Transition State02:26

    SN2 Reaction: Transition State

    An SN2 reaction of an alkyl halide is a single-step process in which bond formation between the nucleophile and the substrate and bond breaking between the substrate and the halide occurs simultaneously through a transition state without forming an intermediate.
    When the nucleophile approaches the electrophilic carbon with its lone pairs, the halide acts as a leaving group and moves away with the electron-pair bonded to the carbon. Dotted partial bonds represent the bonds being formed or broken...
    Energy Diagrams, Transition States, and Intermediates02:13

    Energy Diagrams, Transition States, and Intermediates

    Free-energy diagrams, or reaction coordinate diagrams, are graphs showing the energy changes that occur during a chemical reaction. The reaction coordinate represented on the horizontal axis shows how far the reaction has progressed structurally. Positions along the x-axis close to the reactants have structures resembling the reactants, while positions close to the products resemble the products.  Peaks on the energy diagram represent stable structures with measurable lifetimes, while other...
    Reduction of Alkenes: Catalytic Hydrogenation02:13

    Reduction of Alkenes: Catalytic Hydrogenation

    Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
    Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
    The hydrogenation process takes place on the surface of...
    Hess's Law03:40

    Hess's Law

    There are two ways to determine the amount of heat involved in a chemical change: measure it experimentally, or calculate it from other experimentally determined enthalpy changes. Some reactions are difficult, if not impossible, to investigate and make accurate measurements for experimentally. And even when a reaction is not hard to perform or measure, it is convenient to be able to determine the heat involved in a reaction without having to perform an experiment.
    Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation02:24

    Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

    Introduction
    Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.