Cope Rearrangement

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

개요

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.

일상 속 예시

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

산업적 중요성

코프 반응과 같은 시그마트로픽 자리옮김은 천연물 합성과 유기 재료의 열 안정성 이해에 사용됩니다.

성질

유형
Organic
가역 반응
예
에너지
흡열
ΔH
0.0 kJ/mol
촉매
Heat (200-300 C)

관련 반응

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 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)).