Abstract: MATH/CHEM/COMP 2002, Dubrovnik, June 24-29, 2002
SYMMETRY AND CHIRALITY IN METAL
Viatcheslav I. Sokolov
Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, Moscow, Russian Federation
Polyunsaturated carbon clusters discovered in 1985  known as fullerenes are unique in their structure in several ways. They form a family of similar molecules which can be considered as a collective allotropic form of carbon. Fullerenes had been early recognized as potential ligands of various hapticity for metals . Formally it may vary from h1 to h6. The complete symmetry analysis of mono- and di- h5 and h6 metal complexes of C60 and C70 (with identical metal fragments MLn) had been carried out and some chiral pair combinations found, namely, one combination for C60(h6-MLn)2 and several cases of h5/h5, h5/h6, and h6/h6 ML2 for C70 [3, 4]. It was also shown that Pople’s Framework Group Approach  is useful for description of the fullerene derivatives . Fullerenes h2-coordinated to transition metals are equivalent in terms of symmetry to other 1,2-derivatives, for example, to osmate esters among which the chiral pairs had been identified earlier . Chiral and optically active derivatives of fullerenes has been recently reviewed .
Symmetries of some metal complexed fullerenes with partially violated electronic structures will be also considered.
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