Hydrogenation Oxidation
Hydrogenation Oxidation - Related Videos
06:06
Hydrogenation
0 Views •
2023
Source: Vy M. Dong and Zhiwei Chen, Department of Chemistry, University of California, Irvine, CA This experiment will demonstrate the hydrogenation of chalcone as an example of an alkene hydrogenation reaction (Figure 1). In this experiment, palladium on carbon (Pd/C) will be used as a heterogeneous catalyst for the process. A balloon will be used to supply the hydrogen atmosphere. Figure 1: Diagram showing the hydrogenation of chalcone to 3-phenylpropiophenone.
03:14
Oxidation Numbers
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2020
In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules. Oxidation Number (Oxidation State) In the case of an ionic compound, oxidation numbers are assigned based on the number of electrons transferred between reacting species. For example, in the formation of calcium...
03:11
Oxidation-Reduction Reactions
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2020
Oxidation–Reduction Reactions Earth’s atmosphere contains about 20% molecular oxygen, O2, a chemically reactive gas that plays an essential role in the metabolism of aerobic organisms and in many environmental processes that shape the world. The term oxidation was originally used to describe chemical reactions involving O2, but its meaning has evolved to refer to a broad and important reaction class known as oxidation–reduction (redox) reactions. Some redox reactions involve the transfer of...
08:56
Catalytic Reactor: Hydrogenation of Ethylene
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2023
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA The hydrogenation of ethylene (C2H4) to ethane (C2H6) has often been studied as a model reduction reaction in characterizing new metal catalysts.1-2 While supported nickel is not the most active metal catalyst for this reaction, it is active enough that reaction can take place at < 200°C. The reaction typically involves adsorbed, dissociated hydrogen (H2) reacting...
05:41
Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods
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Cited by 4 •
2016
A protocol for the photochemical oxidative growth of small crystalline iridium oxide nanoparticles on the surface of CdSe@CdS seeded rod nanoparticles is presented.
FAQs
NAD⁺ acts as an electron-accepting cofactor by receiving hydrogen equivalents during oxidation and becoming NADH. This conversion stores reducing power in a form that can participate in later reactions. Because NAD⁺ and NADH are interconverted, cells can connect oxidation of nutrient-derived molecules with reactions that require hydrogenation, helping coordinate energy conversion and biosynthesis.
The two processes are linked through transfers of electrons and hydrogen equivalents between participating molecules. When one compound is oxidized, another can receive the released reducing power and become more reduced. Enzymes organize these exchanges into sequential reactions, allowing cells to capture chemical energy gradually rather than releasing it in a single uncontrolled event.
Enzymes guide specific oxidation-reduction reactions, while cofactors such as NAD⁺ carry reducing power between reaction steps. This organization determines which molecules interact and when electrons or hydrogen equivalents move. Controlled transfer supports metabolic balance by coordinating energy-releasing reactions with energy-consuming processes, including biosynthetic reactions that require reducing power.
During cellular respiration, oxidation of nutrient-derived molecules transfers electrons and hydrogen equivalents to carriers such as NAD⁺, producing NADH. The resulting reducing power connects earlier nutrient-processing reactions with later energy-conversion steps. This staged arrangement enables cells to capture energy from nutrients through linked reactions rather than treating oxidation as an isolated chemical event.
Researchers can examine which compounds are oxidized, which receive hydrogen equivalents, and how NAD⁺ and NADH participate in the sequence. Mapping these transfers helps identify where energy is released, where reducing power is stored, and where it is consumed. Such analysis clarifies how nutrient transformation supports both energy conversion and the maintenance of metabolic balance.
Photosynthesis and biosynthetic pathways require coordinated movement of reducing power, not only the breakdown of nutrients. Hydrogenation reactions can use available reducing power to modify substrates, while oxidation reactions help generate or redistribute it. Studying both directions shows how cells connect energy-conversion pathways with the molecular construction processes needed for growth and survival.