Abstract
The cover picture shows the domains of the electron localization function (ELF) being enveloped by the corresponding 0.8 isosurface in [C70(CH3)2]2−, which was taken as a model compound in the theoretical investigations of the linear polymeric fulleride chains [C]. Such chains were synthesised by reducing C70 with alkaline earth or rare earth metals in liquid ammonia. For the strontium compound [Sr(NH3)8]C70⋅3 NH3 it was possible to determine precisely the individual positions of the carbon atoms in the fulleride by single-crystal X-ray structure analysis. The structural features of the monomeric units in the chain agree very well with the results of quantum-chemical calculations for the model compound. By analysing the ELF, the nature of the various CC bonds in the cage can be determined. The consequences for the reaction behaviour of reduced C70 are discussed in more detail by M. Jansen et al. on p. 2769 ff.
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