what is hydrogenation?

Answer 1

Hydrogenation is a process in which the net result is an addition of hydrogen (H2). The usual targets of hydrogenation are unsaturated organic compounds, such as alkenes, alkynes, ketones, nitriles, and imines.Most hydrogenation reactions need catalysts.(All reactions between organic compounds and H2 require metal catalysts. With rare exception, no reaction below 480 °C occurs between H2 and organic compounds in the absence of metal catalysts. The catalyst adsorbs both the hydrogen gas and the organic molecule and facilitates their interaction. Platinum group metals, particularly platinum, palladium, rhodium, and ruthenium, are highly effective as catalysts.)

The classical example of a hydrogenation is the addition of hydrogen on unsaturated bonds between carbon atoms, converting alkenes to alkanes. Numerous important applications are found in the pharmaceutical and petrochemical industries.

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Answer 2

Hydrogenation is a class of chemical reactions in which the net result is an addition of hydrogen (H2). The usual targets of hydrogenation are unsaturated organic compounds, such as alkenes, alkynes, ketones, nitriles, and imine.[1] Most hydrogenations involve the direct addition of diatomic hydrogen under pressure in the presence of catalysts. Some hydrogenations involve the indirect addition of hydrogen, these are called transfer hydrogenations.

The classical example of a hydrogenation is the addition of hydrogen on unsaturated bonds between carbon atoms, converting alkenes to alkanes. Numerous important applications are found in the pharmaceutical and petrochemical industries.

The reverse of hydrogenation is dehydrogenation.

Answer 3

hydrogenation is the chemical reaction of a substance with molecular hydrogen, usually in the presence of a catalyst. A common hydrogenation is the hardening of animal fats or vegetable oils to make them solid at room temperature and improve their stability. Hydrogen is added (in the presence of a nickel catalyst) to carbon-carbon double bonds in the unsaturated fatty acid portion of the fat or oil molecule:Another hydrogenation is the synthesis of methanol from carbon monoxide. Hydrogenation reactions are important in petroleum refining; production of gasoline by cracking involves destructive hydrogenation (hydrogenolysis), in which large molecules are broken down to smaller ones and reacted with hydrogen. Most hydrogenation reactions are reversible and proceed to favorable equilibria at high pressure and moderate temperature.