Chiral derivatives of exo-metallofullerenes: Synthesis and X-ray study of solvate of platinumfullerene cluster with cyclooctene, η2-C60Pt[(+)-DIOP] · C8H14

Article abstract of DOI:10.1007/BF01431621

A novel optically active exo-metallofullerene derivative, η²-C₆₀Pt[(+)-DIOP] (1) (DIOP is 2,3-o,o′-isopropylidene-2,3-dihydroxy-1,4-bis(diphenylphosphinobutane)), is formed as a result of the cleavage of the chelate metallocycle in Pt[(+)-DIOP]₂ and the substitution of the bidentate (+)-DIOP ligand with C₆₀. Cluster 1 was also obtained by replacement of the phosphine ligands in η²-C₆₀Pt(PPh₃)₂ by (+)-DIOP. Compound 1 was identified by its electronic absorption spectra, ³¹P NMR spectra, and the elemental analysis data. A single-crystal X-ray study of the 1 cyclooctene solvate, η²-C₆₀Pt[(+)-DIOP] · C₈H₁₄ was performed. Packing of the fullerene cores in a crystal of 1 · C₈H₁₄ corresponds to the diamond structure subjected to the significant orthorhombic distortions.