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Hay un radical neutro que contiene xenón, HXeOO.
Leonid Khriachtchev1, Mika Pettersson, Jan Lundell
1Laboratory of Physical Chemistry, FIN-00014 University of Helsinki, Finland.
Journal of the American Chemical Society
|February 6, 2003
Resumen
Los investigadores crearon una nueva molécula que contiene xenón, HXeO, utilizando fotólisis UV y movilización térmica. Este descubrimiento innovador en la química de los gases nobles revela la estabilidad intrínseca del HXeO, abriendo caminos para especies relacionadas.
Área de la Ciencia:
- Química Inorgánica La Química Inorgánica es la química inorgánica.
- Química Física es la química física.
- La espectroscopia es una técnica de espectroscopia.
Sus antecedentes:
- Los compuestos de gases nobles son de gran interés debido a sus inusuales características de unión.
- El estudio de las especies de concha abierta proporciona información sobre la reactividad química y la estabilidad.
- La estructura electrónica única del xenón permite la formación de nuevos enlaces químicos.
Objetivo del estudio:
- Para sintetizar y caracterizar una nueva especie de concha abierta que contiene xenón, específicamente HXeO.
- Para investigar la estabilidad y las propiedades de enlace de la molécula HXeO.
- Explorar el potencial para la creación de hidritos de gases nobles relacionados como HKrO y HArO.
Principales métodos:
- Fotólisis UV de las mezclas sólidas H(2) O/Xe o N(2) O/HBr/Xe a temperaturas criogénicas (7 K).
- Movilización térmica de los átomos de oxígeno a temperaturas superiores o iguales a 30 K.
- Espectroscopia infrarroja para detectar la absorción de estiramiento H-Xe.
- Cálculos ab initio para determinar la estructura electrónica y la unión de HXeO.
Principales resultados:
- Preparación exitosa de la especie HXeO ((2) Sigma) de caparazón abierto.
- Identificación de la banda de absorción de estiramiento H-Xe a 1466.1 cm ((-1) en el Xe. sólido.
- Observación de un desplazamiento espectral significativo a 1070,3 cm(-1) después de la deuteración (DXeO).
- Los cálculos teóricos confirmaron la estabilidad intrínseca del HXeO, atribuyéndolo a la unión iónica y covalente combinada.
Conclusiones:
- La formación de radicales HXeO demuestra la estabilización y movilidad de los átomos de oxígeno en el xenón sólido.
- El estudio proporciona una fuerte evidencia de la estabilidad inherente de HXeO, desafiando las suposiciones anteriores sobre la química de los gases nobles.
- Estos hallazgos sugieren que los hidruros similares de gases nobles más ligeros, como HKrO y HArO, también pueden ser estables y sintetizables.
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