Gain of hydrogen

In certain cases, you can describe a reduction as the gain of hydrogen atoms in going from reactant to product. For example, carbon monoxide and hydrogen gas can be reduced to methyl alcohol  

In this reduction process, the CO has gained the hydrogen atoms. 

Neither oxidation nor reduction can take place without the other. When those electrons are lost, something has to gain them. Consider, for example, the net-ionic equation (the equation showing just the chemical substances that are changed during a reaction — see Chapter 7) for a reaction with zinc metal and an aqueous copper(ll) sulfate solution  

This overall reaction is really composed of two half-reactions  

To help yourself remember which reaction is oxidation and which is reduction in terms of electrons, memorize the phrase LEO goes GER (Lose Electrons Oxidation Gain Electrons Reduction). 

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Because many reactions involving oxidation and reduction do not involve loss or gain of hydrogen and/or oxygen, it is more useful to define oxidation and reduction in terms of electrons. 

In the reaction the nitrate ion is reduced, as oxygen is removed from the nitrogen atom, and it gains hydrogen to form ammonia, NHS. The gain of hydrogen is also a definition of reduction. 

Reduction is (1) gain of electrons (2) loss of oxygen or gain of hydrogen. 

Reduction is defined as the gain of hydrogen, or the loss of oxygen, or the gam of electrons. 

Debije M.G., Bernhard W.A., Thermally stable sites for electron capture in directly ionized DNA free radicals produced by the net gain of hydrogen a C5/C6 of cytosine and thymine in crystalline oligodeoxynucleotides. J. Phys. Chem. A, 2002,106,4608-4615. 

Quite remarkably, paramagnetic Cp Pt radicals tend to escape from undesirable (f and (f electron configurations via a net loss or gain of hydrogen atoms, instead of the ligand-ligand or metal-metal coupling reactions observed for related Rh species (98). 

Reduction is defined as a gain of electrons, gain of hydrogen atoms, or loss of oxygen atoms. A chlorine atom is reduced to a chloride ion by gaining one electron when it reacts with a metal such as sodium ... 

One way to recognize reduction, particularly in organic chemistry, is the gain of hydrogen. Oxidation and reduction are discussed in Section 13.6. 

Oxidation The gain of oxygen, loss of hydrogen, or loss of electrons Reduction The loss of oxygen, gain of hydrogen, or gain of electrons... 

The gain of electrons The loss of oxygen The gain of hydrogen... 

In organic chemistry, oxidation and reduction processes are different from ordinary redox reactions because in many cases they do not involve direct electron transfer but may involve a decrease in electron density around a molecule or loss/gain of hydrogen. Oxidation reactions are useful to convert alcohols into carbonyl compounds, nitriles into acids, and amines into imines. SSA along with a suitable reagent such as oxone or sodium nitrite serves as a powerful oxidant. This part of the chapter encompasses the oxidation reactions catalyzed by SSA. 

The gain of electrons. Alternatively, the gain of hydrogen, the loss of oxygens, or both. 

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