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El octacloroazuleno es una sustancia

Yan Lou1, Joanne Chang, Jeffrey Jorgensen

  • 1Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, USA. david.m.lemal@dartmouth.edu

Journal of the American Chemical Society
|December 19, 2002
PubMed
Resumen

Los investigadores sintetizaron el primer perhaloazuleno, un compuesto halogenado de azuleno. Esta nueva síntesis abre nuevas vías para explorar los compuestos aromáticos halogenados y sus propiedades químicas únicas.

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Área de la Ciencia:

  • Química orgánica es la química orgánica.
  • Compuestos halogenados Compuestos halogenados.
  • Los sistemas aromáticos son sistemas aromáticos.

Sus antecedentes:

  • Los derivados de azuleno son conocidos por sus propiedades electrónicas y estructurales únicas.
  • Los compuestos aromáticos perhalogenados a menudo exhiben una reactividad y estabilidad distintas.
  • La síntesis de nuevos azulenos halogenados sigue siendo un área de interés.

Objetivo del estudio:

  • Para sintetizar el primer perhaloazuleno.
  • Para investigar el comportamiento de cloración del hexacloroazuleno.
  • Para explorar la reactividad de los derivados de azuleno altamente clorados.

Principales métodos:

  • Síntesis del 1,3,4,5,6,7-hexacloroazuleno a partir del hexaclorobutadieno y el ciclopentadieno.
  • Clorinación electrofílica y de radicales libres del hexacloroazuleno.
  • Transformaciones químicas del decaclorotetrahidroazuleno utilizando bases de fosfazeno, catálisis ácida y reducción con mercurio.

Principales resultados:

  • Síntesis exitosa del primer perhaloazuleno.
  • La cloración del hexacloroazuleno se produce por adición, no por sustitución.
  • La cloración radical produce el decaclorotetrahidroazuleno.
  • El decáclorotetrahidroazuleno puede convertirse en nonaclorodihidroazuleno, heptaclorazuleno u octaclorazuleno dependiendo de las condiciones de reacción.
  • El octachloroazuleno es sensible y no puede convertirse fácilmente en su contraparte fluoro.

Conclusiones:

  • La síntesis de perhaloazulenes es alcanzable.
  • Los azulenos altamente clorados exhiben reacciones únicas de adición y eliminación.
  • La estabilidad del octacloroazuleno limita más reacciones de intercambio de halógenos.