Transposición de Cope

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

Descripción general

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.

Ejemplo cotidiano

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

Importancia industrial

Los reordenamientos sigmatrópicos como el de Cope se utilizan en la síntesis de productos naturales y en la comprensión de la estabilidad térmica de materiales orgánicos.

Preguntas frecuentes

What is the equation for Transposición de Cope?
The balanced equation is: 1,5-hexadiene ⇌ 1,5-hexadiene (rearranged).
What type of reaction is Transposición de Cope?
Transposición de Cope is a orgánica reaction. It is reversible under certain conditions.
Is Transposición de Cope exothermic or endothermic?
Transposición de Cope is endothermic (absorbs energy). The enthalpy change (ΔH) is 0.0 kJ/mol.
What conditions are needed for Transposición de Cope?
This reaction requires a catalyst (Heat (200-300 C)).