Hartree-Fock and density functional theory calculations showed that the B, C, D, and E fullerene C 70 cycles were not coplanar. The interrelation between acoplanarity and pyramidality of atoms was studied. The bond lengths, valence and torsion angles, and charges and chemical shifts of fullerene C 70 atoms were jointly analyzed. Most attention was given to the acoplanarity of hexagons E in the aromatic belt.
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Зверев et al. (2006) studied this question.
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