60391-90-4Relevant academic research and scientific papers
Small Rings, 74. - Hexa-tert-butyl-3,3'-bicyclopropenyl
Maier, Guenter,Schick, Andreas,Bauer, Ines,Boese, Roland,Nussbaumer, Michael
, p. 2111 - 2118 (2007/10/02)
Title compound 3 can be prepared by reductive coupling of tri-tert-butylcyclopropenylium tetrafluoroborate (4a) with lithium.Upon treatment with AgBF4 3 does not undergo valence isomerization to the Dewar form of hexa-tert-butylbenzene (2) but is reoxidized under backformation of substrate 4a.The photochemical behavior of 6 is also unusual: Irradiation at room temperature results in gas evolution.However, instead of 7, the ?-diketone 5 is isolated.Monoketone 7 is only formed if 6 is irradiated in an organic matrix at -196 deg C. Key words: Steric hindrance / Redox chemistry / Bicyclopropenyl / Small rings
