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Calicene : ウィキペディア英語版
Calicene

Calicene or Triapentafulvalene or 5-(2-Cyclopropen-1-ylidene)-1,3-cyclopentadiene is a Fulvalenes hydrocarbon with chemical formula C8H6, composed of linked a cyclopentadiene ring and a cyclopropene ring.
==Properties==
Very high resonance energy is predicted by Hückel method, however its resonance energy is not high.
The central double bond is polarized with a partial positive charge on the carbon atom of triangular ring and a partial negative charge on the carbon atom of pentagonal ring. Calicene's dipole moment is 4.66D.
Several compounds that contains two or more calicene subunits are aromatic, such as trans-bicalicene〔(ring compound) or poly-2,7-()calicenes (chain compound)

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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