Cope Rearrangement

1,5-hexadiene ⇌ 1,5-hexadiene (rearranged)

Tổng quan

The Cope rearrangement is a [3,3]-sigmatropic rearrangement of 1,5-dienes that proceeds through a chair-like transition state. No bonds are broken or formed to reagents; the sigma bond migrates through the diene framework. The oxy-Cope variant (followed by keto-enol tautomerism) is particularly useful in synthesis.

Ví dụ thực tế

The Cope rearrangement demonstrates that molecules can rearrange thermally without any catalyst or reagent, just by heating.

Tầm quan trọng công nghiệp

Sigmatropic rearrangements like the Cope are used in natural product synthesis and in understanding thermal stability of organic materials.

Tính chất

Loại: Organic
Thuận nghịch: Có
Năng lượng: Thu nhiệt
ΔH: 0,0 kJ/mol
Chất xúc tác: Heat (200-300 C)

Phản ứng liên quan

Swern Oxidation Oxidation of Secondary Alcohol to Ketone Claisen Condensation (Ethyl Acetate) Kolbe Electrolysis Baeyer-Villiger Oxidation Beckmann Rearrangement (Cyclohexanone Oxime) Catalytic Hydrogenation of Ethylene Condensation Polymerization (Nylon 6,6) Oxidation of Primary Alcohol to Aldehyde Epoxidation of Alkenes (mCPBA)

Frequently Asked Questions

What is the equation for Cope Rearrangement?

The balanced equation is: 1,5-hexadiene ⇌ 1,5-hexadiene (rearranged).

What type of reaction is Cope Rearrangement?

Cope Rearrangement is a organic reaction. It is reversible under certain conditions.

Is Cope Rearrangement exothermic or endothermic?

Cope Rearrangement is endothermic (absorbs energy). The enthalpy change (ΔH) is 0.0 kJ/mol.

What conditions are needed for Cope Rearrangement?

This reaction requires a catalyst (Heat (200-300 C)).