INDO calculation was used to study the two structures of C62O3: one of
C-2v symmetry and the other of C-s symmetry, A patch of topology of C
-60 was employed to discuss the symmetry of additive and cycloadditive
products of C-60, and related to C-13 NMR results, Stability comparis
on was made between the devivatives of three-membered and five-membere
d rings, The calculated electronic spectrum far C62O3(C-2v) is in agre
ement with the experimental results.