Metátesis de olefinas
2 R–CH=CH–R' ⇌ R–CH=CH–R + R'–CH=CH–R'
Descripción general
Olefin metathesis exchanges substituents around carbon-carbon double bonds using a ruthenium or molybdenum carbene catalyst. The mechanism involves [2+2] cycloaddition to form a metallacyclobutane, followed by cycloreversion. Chauvin, Grubbs, and Schrock shared the 2005 Nobel Prize for this reaction.
Ejemplo cotidiano
Ring-closing metathesis is used to produce macrocyclic drug molecules like the hepatitis C drug simeprevir.
Importancia industrial
Fundamental en la síntesis de polímeros especiales (ROMP), fármacos de alto valor añadido y en la industria petroquímica para producir alquenos de fracción específica.
Propiedades
- Tipo
- Orgánica
- Reversible
- Sí
- Energía
- Exotérmico
- ΔH
- -5,0 kJ/mol
- Catalizador
- Grubbs catalyst (Ru-based)
Reacciones relacionadas
Preguntas frecuentes
What is the equation for Metátesis de olefinas?
The balanced equation is: 2 R–CH=CH–R' ⇌ R–CH=CH–R + R'–CH=CH–R'.
What type of reaction is Metátesis de olefinas?
Metátesis de olefinas is a orgánica reaction. It is reversible under certain conditions.
Is Metátesis de olefinas exothermic or endothermic?
Metátesis de olefinas is exothermic (releases energy). The enthalpy change (ΔH) is -5.0 kJ/mol.
What conditions are needed for Metátesis de olefinas?
This reaction requires a catalyst (Grubbs catalyst (Ru-based)).