Crystal structures of 2,3,7,8,12,13,17,18-octabromo- 5,10,15,20-tetrakis(pentafluorophenyl)- porphyrin as the chloroform monosolvate and tetrahydrofuran monosolvate.

The crystal structures of the title compounds, two solvates (CHCl₃ and THF) of a symmetric and highly substituted porphyrin, C₄₄H₂Br₈F₂₀N₄ or OBrTPFPP, are described. These structures each feature a non-planar porphyrin ring, exhibiting a similar conformation of the strained ring independent of solvent identity. These distorted porphyrins are able to form hydrogen bonds and subvan der Waals halogen interactions with enclathrated solvent; supramolecular interactions of proximal macrocycles are additionally affected by solvent choice. The crystal studied for compound 1·CHCl₃ was refined as an inversion twin. One pentafluorophenyl group was modelled as disordered over two sites [occupancy ratio = 0.462 (7):0.538 (7)]. The chloroform solvate was also modelled as disordered over two orientations [occupancy ratio = 0.882 (7): 0.118 (7). [ABSTRACT FROM AUTHOR]