THEORETICAL-STUDY OF HYDROGENATED BUCKMINSTERFULLERENE DERIVATIVES WITH BENZENOID RINGS, C60H60-6N(N=1-8)

The equilibrium geometries, heats of formation, and harmonic vibration al frequencies of hydrogenated buckminsterfullerene derivatives C60H60 -6n. Containing 1-8 benzenoid units were computed using MNDO and AM1 m ethods. Although the Hessian indices indicate that all such structures are true minima, the T symmetry structure of C60H36 With four benzene rings is calculated to be the best prospect for experimental characte rization. The relative stabilities of the various derivatives are prin cipally controlled by angle strain at the sp2 and sp3 carbon atoms.