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Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
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Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
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Fósforos y arsálumenos aislables

Malte Fischer1, Samuel Nees2,3, Thomas Kupfer2,3

  • 1Leibniz Institut für Katalyse e.V. (LIKAT), A.-Einstein-Str.3a, 18059 Rostock, Germany.

Journal of the American Chemical Society
|March 10, 2021
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores sintetizaron nuevos pnictaalumenes y sistemas de anillos aromáticos de tres miembros utilizando complejos de aluminio y reactivos pnicta-Wittig. Estos compuestos presentan enlaces polarizados únicos y estabilización intramolecular, lo que hace avanzar la química organometálica.

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Área de la Ciencia:

  • Química organometálica
  • Química del grupo principal
  • Química sintética

Sus antecedentes:

  • Los complejos de aluminio como (AlCp*) 4 sirven como precursores de las especies monoméricas reactivas de aluminio.
  • Los reactivos de Pnicta-Wittig, como el TerPnPMe3 (Pn = P, As), son herramientas valiosas para la formación de enlaces múltiples elemento-elemento.

Objetivo del estudio:

  • Investigar la reactividad de las especies monoméricas de aluminio con reactivos de pnicta-Wittig.
  • Para sintetizar y caracterizar los nuevos compuestos de aluminio-pnictógeno.
  • Explorar las características estructurales y la unión en los productos resultantes.

Principales métodos:

  • Reacción de (AlCp*) 4 con TerPnPMe3 a 80 °C.
  • Reacción de MesTerPPMe3 con 2 equivalentes de: AlCp3t o: AlCp*.
  • Caracterización de los productos mediante métodos espectroscópicos y estructurales (implicados).

Principales resultados:

  • Formación limpia de pnictaalumenes Dip con enlaces dobles Pn-Al polarizados.
  • Estabilización intramolecular observada en los pnictaalúmenos a través de las interacciones Al-arilo.
  • Síntesis de sistemas de anillos aromáticos 2π de tres miembros (x = 3t, *).

Conclusiones:

  • El estudio demuestra una vía sintética versátil para nuevos compuestos organoaluminio-pnictógeno.
  • Los resultados destacan la formación de enlaces dobles Pn-Al polarizados y sistemas de anillos aromáticos únicos.
  • Este trabajo amplía el alcance de la química pnicta-Wittig y la síntesis de organoaluminio.