9HFluorene

9H-Fluorene, often simply called fluorene, is an organic compound with the chemical formula C13H10. It is a polycyclic aromatic hydrocarbon (PAH) consisting of two benzene rings fused to a central five-membered ring. At room temperature, fluorene is a solid, typically appearing as colorless or pale yellow crystals. It has a distinctive, somewhat aromatic odor.

Fluorene is found naturally in coal tar and is also produced industrially through processes like the fractional distillation of coal tar or through specific synthetic routes. It is a relatively stable compound due to its aromatic nature.

In terms of its chemical properties, the methylene group at the 9-position (the carbon atom connecting the two benzene rings) is particularly reactive. This reactivity allows fluorene to undergo various chemical reactions, including oxidation, alkylation, and halogenation.

Fluorene serves as a precursor in the synthesis of various chemicals and materials. It is used in the production of dyes, pharmaceuticals, and polymers. Derivatives of fluorene, such as fluorenone, are important intermediates in organic synthesis. The unique electronic properties of fluorene-based compounds have also led to their exploration in the field of organic electronics, including applications in organic light-emitting diodes (OLEDs) and organic photovoltaics.