An x-ray crystal structure that confirms the soccer ball-shaped carbon framework of C(60) (buckminsterfullerene) is reported. An osmyl unit was added to C(60) in order to break its pseudospherical symmetry and give an ordered crystal. The crystal structure of this derivative, C(60)(OsO(4))(4-tert-butylpyridine)(2), reveals atomic positions within the carbon cluster.

Treatment of C60 with osmium tetroxide and pyridine gives the osmate ester (2:1 adduct) establishing that oxygen functionality can be added to C60 without disrupting the carbon framework.

ChemInform Abstract The alkoxide-bridged Ru dimers (IIIa) (space group C2/c, Z = 8) and (IIIb) are prepared according to the scheme. The ethoxide dimer (IIIb) reacts with CO (IV) to form the adduct (V) (P421c, Z = 8). An analogous adduct of (IIIa) is observed by 1H NMR but is unstable. Reaction of the 2,6-di-tert.-butylphenoxide (VI) with the tetramer (I) gives the η5-oxocyclohexadienyl complex (VII) ( P21/n, Z=4). The electronic structure of ((η5-C5H5)Ru(µ-OMe))2 is investigated by using Fenske-Hall MO calculations.

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