Introduction of a Simple Experiment for the Undergraduate Organic Chemistry Laboratory Demonstrating the Lewis Acid and Shape-Selective Properties of Zeolite Na-Y

• Vincent Maloney ^[1] ; Zach Szczepanski ^[1] ; Keith Smith ^[2]
  1. [1] Purdue University

     Purdue University

     Township of Wabash, Estados Unidos

     
  2. [2] Cardiff University

     Cardiff University

     Castle, Reino Unido

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 94, Nº 9, 2017, págs. 1343-1346
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • A simple, inexpensive, discovery-based experiment for undergraduate organic laboratories has been developed that demonstrates the Lewis acid and shape-selective properties of zeolites. Calcined zeolite Na-Y promotes the electrophilic aromatic bromination of toluene with a significantly higher para/ortho ratio than observed under conventional conditions. The experiment can be completed in one three-hour laboratory period. The zeolite can be recovered and regenerated for later reuse. A broad range of organic course topics from orientation in electrophilic aromatic substitution to photochemistry can be discussed.