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Exploratory semi-empirical SCF calculations are done on mono, di, tri, tetra, and pentabenzocorannulenes to assess the effect of sequential benzannulation to the corannulene moiety. Computed results predict a gradual reduction in the bowl-to-bowl inversion barrier in each step of the successive benzannulations and eventually for pentabenzocorannulene the barrier is only 1.4kcalmol−1 at the MNDO level...
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