Benzocyclobutadiene dications

Cyclooctatetraene dications 225407 4m and benzocyclobutadiene dications 226471 472 are well studied. The parent cyclooctatetraene dication is still elusive, despite repeated attempts to prepare it under a variety of superacid conditions. 

Dications and dianions derived from benzocyclobutadiene have also been reported. (Vhen a dihydroxybenzocyclobutene was dissolved in a very strong acid at low temperature the H- and C-n.m.r. spectra indicated that a dication with a fully delocalised system of 6 TT-electrons resulted [121,122] ... 

Bamberger, 4 Benzoannulenes, 331 Benzoannulenes, dehydro, 332 Benzobiphenylenes, 230 Benzocyclobutadienes, 216 Benzocyclobutadienes, dianions, dications, 220 Benzocyclononatetraenide salts, 265... 

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See also in sourсe #XX -- [ ]

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