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9-Fluorenylidene is an aryl carbene derived from the bridging methylene group of fluorene. Fluorenylidene has the unusual property that the triplet ground state is only 1.1 kcal/mol (4.6 kJ/mol) lower in energy than the singlet state. For this reason, fluorenylidene has been studied extensively in organic chemistry.

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  • 9-Fluorenylidene is an aryl carbene derived from the bridging methylene group of fluorene. Fluorenylidene has the unusual property that the triplet ground state is only 1.1 kcal/mol (4.6 kJ/mol) lower in energy than the singlet state. For this reason, fluorenylidene has been studied extensively in organic chemistry. Fluorenylidene is a reactive intermediate. Reactions involving fluorenylidene proceed through either the triplet or singlet state carbene, and the products formed depend on the relative concentration of spin states in solution, as influenced by experimental conditions. The rate of intersystem crossing is determined by the temperature and concentration of specific spin-trapping agents. (en)
  • El 9-fluorenilideno es un carbeno arilo derivado del puente de metileno del fluoreno . El fluorenilideno tiene la propiedad inusual de que el estado triplete tiene solo 1,1 kcal/mol (4,6 kJ/mol) menos de energía que el estado singlete . ​ Por esta razón, el fluorenilideno se ha estudiado extensamente en química orgánica. El fluorenilideno es un . Las reacciones en las que interviene el fluorenilideno tienen lugar a través del carbeno en estado triplete o singulete, y los productos formados dependen de la concentración relativa de los estados de espín en la solución, según la influencia de las condiciones experimentales. ​ La tasa de cruce intersistema está determinada por la temperatura y la concentración de agentes de captura de espín específicos. ​ (es)
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  • 9H-Fluoren-9-ylidene (en)
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  • Fluorenylidene Carbene.png (en)
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  • 9-Fluorenylidene is an aryl carbene derived from the bridging methylene group of fluorene. Fluorenylidene has the unusual property that the triplet ground state is only 1.1 kcal/mol (4.6 kJ/mol) lower in energy than the singlet state. For this reason, fluorenylidene has been studied extensively in organic chemistry. (en)
  • El 9-fluorenilideno es un carbeno arilo derivado del puente de metileno del fluoreno . El fluorenilideno tiene la propiedad inusual de que el estado triplete tiene solo 1,1 kcal/mol (4,6 kJ/mol) menos de energía que el estado singlete . ​ Por esta razón, el fluorenilideno se ha estudiado extensamente en química orgánica. (es)
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  • Fluorenilideno (es)
  • Fluorenylidene (en)
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