Mono crystals ruthenium

A singular chiral adduct was formed between C70 and two RujfCOjg units which are known for the complexation of arenes. From the corresponding mono -adduct it was known that the trinuclear ruthenium moieties add preferentially to the hexagons of highest local curvature [143]. Assuming addition of two Ru3(CO)9 units at opposite poles, three constitutional isomers of [[Ru3(CO)9 2(ft-T2, /2, rf-C7o)] are possible in analogy to the addition of achiral divalent addends to a-type bonds (cf. Sect. 4.2.1) [54,131 ] One of them has symmetry and two have C2-symmetry. Of the three formed isomers, the major one afforded crystals suitable for X-ray analysis it has an inherently chiral addition pattern and corresponds to structure ( )-59 [143] (Fig. 9). 

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