Diindeno[1,2,3,4-defg;1',2',3',4'-mnop]chrysenes 2 were straightforwardly prepared in around 20% yield from 9,10-diarylphenanthrenes 3 by palladium-catalyzed intramolecular arylations. The bowl-to-bowl inversion barrier for buckybowl 2-iPr is predicted to be approximately 7 kcal mol(-1) based on density functional theory calculations and this value is consistent with the results of a variable-temperature (1)H-NMR study.
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