Английская Википедия:Dibenzopentalene
Dibenzopentalene (dibenzo[a,e]pentalene or dibenzo[b,f]pentalene) is an organic compound and a hydrocarbon with formula C16H10. It is of some scientific interest as a stable derivative of the highly reactive antiaromatic pentalene by benzannulation.[1] The first derivative was synthesised in 1912 by Brand.[2] The parent compound was reported in 1952.[3] The NICS value for the 5-membered rings is estimated at 7.4 ppm and that of the six-membered rings -9.8 ppm.[1] Aromatic dicationic salts can be obtained by reaction with antimony pentafluoride in sulfuryl chloride. The dianion forms by reduction with lithium metal or deprotonation of 5,10-dihydroindeno[2,1-a]indene with two equivalents of butyllithium.[4][5] The aromatic nature of the dianion has been confirmed by X-ray analysis.[6] Another isomer of this compound exists called dibenzo[a,f]pentalene with one of the benzene rings positioned on the other available pentalene face.
References
- ↑ 1,0 1,1 Шаблон:Cite journal
- ↑ Brand, K. Über Gefärbte Kohlenwasserstoffe der Diphensuccinden-Reihe. Ber. Detsch. Chem. Ges. 1912, 45, 3071-3077
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
