Diels-Alder Reaction (Butadiene + Ethylene)

C₄H₆ + C₂H₄ → C₆H₁₀

Tổng quan

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.

Người tham gia

Vai trò	Chất	Hệ số	Trạng thái
Chất phản ứng	Ethylene C₂H₄	1	(g)
Sản phẩm	Cyclohexane C₆H₁₂	1	(l)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

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

Tính chất

Loại: Organic
Thuận nghịch: Có
Năng lượng: Tỏa nhiệt
ΔH: -40,0 kJ/mol

Phản ứng liên quan

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.