Syntheses and Properties of 7,9-Diphenyl- and 7,8,9-Triphenylcyclopent[<i>a</i>]acenaphthylenide Ions
作者:Koichi Komatsu、Ryuji Fujiura、Kunio Okamoto
DOI:10.1246/cl.1988.265
日期:1988.2.5
The 7,9-diphenyl- (3) and 7,8,9-triphenylcyclopent[a]acenaphthylenide ions (2) have been prepared and fully characterized in comparison with the pentaphenylcyclopentadienide ion (1). The anions 2 and 3 are nearly 1 pK unit more stabilized and about 0.05 V more readily oxidized than the anion 1. Whereas the one-electron oxidation of 2 affords the persisting radical, the oxidation of 3 gives the dimeric compound quantitatively.
与五苯基环戊二烯离子(1)相比,我们制备了 7,9-二苯基(3)和 7,8,9-三苯基环戊并[a]苊烯离子(2),并对其进行了全面表征。与阴离子 1 相比,阴离子 2 和 3 的稳定性高出近 1 pK 单位,且更容易氧化约 0.05 V。2 的单电子氧化产生了持久自由基,而 3 的氧化则定量产生了二聚化合物。