The diiridium complexes of lithium-ion endohedral fullerene Li@C were synthesised in high yields. X-ray crystallography revealed the η:η-coordination of Li@C and the disorder of the Li ion over two sites close to the coordinated carbons. C NMR study suggested the presence of dynamic behaviour haptotropic rearrangements. UV/Vis and CV characteristics were also investigated experimentally and theoretically.
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