Diels-Alder Reaction (Butadiene + Ethylene)

C₄H₆ + C₂H₄ → C₆H₁₀

Обзор

A conjugated diene (1,3-butadiene) reacts with a dienophile (ethylene) in a [4+2] cycloaddition to form cyclohexene. This pericyclic reaction proceeds through a concerted mechanism with no intermediates, forming two new carbon-carbon bonds and a six-membered ring simultaneously.

Участники

Роль	Вещество	Коэффициент	Состояние
Реагент	Ethylene C₂H₄	1	(g)
Продукт	Cyclohexane C₆H₁₂	1	(l)

Пример из жизни

Otto Diels and Kurt Alder won the 1950 Nobel Prize for discovering this reaction, which is taught in every organic chemistry course.

Промышленное значение

Diels-Alder reactions are used to synthesize steroids, terpenes, alkaloids, and many pharmaceutical intermediates with precise stereochemical control.

Свойства

Тип: Organic
Обратимая: Да
Энергия: Экзотермическая
ΔH: -40,0 kJ/mol

Связанные реакции

Epoxidation of Alkenes (mCPBA) Swern Oxidation Oxidation of Secondary Alcohol to Ketone E2 Elimination (Dehydrohalogenation) Claisen Condensation (Ethyl Acetate) Aldol Condensation of Acetaldehyde Kolbe Electrolysis Baeyer-Villiger Oxidation Beckmann Rearrangement (Cyclohexanone Oxime) Dehydration of Ethanol

Frequently Asked Questions

What is the equation for Diels-Alder Reaction (Butadiene + Ethylene)?

The balanced equation is: C₄H₆ + C₂H₄ → C₆H₁₀.

What type of reaction is Diels-Alder Reaction (Butadiene + Ethylene)?

Diels-Alder Reaction (Butadiene + Ethylene) is a organic reaction. It is reversible under certain conditions.

Is Diels-Alder Reaction (Butadiene + Ethylene) exothermic or endothermic?

Diels-Alder Reaction (Butadiene + Ethylene) is exothermic (releases energy). The enthalpy change (ΔH) is -40.0 kJ/mol.