Journal of the American Chemical Society, Vol.121, No.30, 7090-7097, 1999
Interaction of curved and flat molecular surfaces. The structures of crystalline compounds composed of fullerene (C-60, C60O, C-70, and C120O) and metal octaethylporphyrin units
Solutions of C-60, C60O, or C-70 and metal complexes of octaethylporphyrin (OEPH2) yield crystals that contain both the fullerene and the porphyrin. The structures of C-60. 2Co(II)(OEP). CHCl3, C-60. 2Zn(II)(OEP). CHCl3, and C60O . 2Co(II)(OEP). CHCl3 are isomorphous and contain an ordered C-60 cage surrounded by two M-II(OEP) units. Although there is no covalent bond between the fullerene and porphyrin components, the separation between these units is shorter than normal van der Waals contact. Crystals of C-70. Co-II(OEP). C6H6. CHCl3, C-70. Ni-II(OEP). C6H6. CHCl3, and C-70. Cu-II(OEP). C6H6. CHCl3 are also isomorphous with an ordered fullerene, but have only one porphyrin/fullerene contact. Crystalline C-60. ClFeIII(OEP). CHCl3 lacks the close face-to-face porphyrin/porphyrin contact that is common to all of the other structures reported here but retains the intimate contact between the porphyrin and the fullerene. In (C120O). Co-II(OEP). 0.6C(6)H(6). 0.4CHCl(3) the fullerene dimer is enclosed by two Con(OEP) moieties. Unfortunately disorder in the fullerene portion obscures details of the geometry of the bridging region between the fullerenes.