Resonancia en Química orgánica
Transcript of Resonancia en Química orgánica
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Resonancia en Química orgánica
Electivo de Química III°medio 2017
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PROPIEDADES ELECTRÓNICAS DE COMPUESTOS ORGÁNICOS: RESONANCIA
• Teoría que inicialmente se propuso para explicar la estructura del benceno
• Indica que los dobles enlaces del benceno no están localizados, si no que los electrones se deslocalizan por sobre y bajo el plano
• Movimiento de electrones, no núcleos en una molécula.
C sp2
Orbitales
Híbrido de resonancia
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ESTRUCTURAS RESONANTES VS HIBRIDOS
(IRREAL VS REAL)
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•Involucra la deslocalización de electrones.
•Las estructuras resonantes sumadas representan a la molécula real (Híbrido de resonancia)
• Son estructuras más contribuyentes las especies sin carga
Cl Cl
Mas contribuyente
RESONANCIA
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Ejemplo2
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CH2 CH2 CH2 CH2 CH2
CH2
+
+
+
+
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Sistemas resonantes con mas de dos contribuyentes
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