Static Studies in the Solid State by Crystallography

The X-ray structure of meso-hexa(pentahuorophenyl)hexaphyrin 80 found to be an expanded frans-porphyrin was reported recently by Aveiro s group. In the NMR, the two NH protons appear at -1.98 ppm and the four inside pyrrole CH protons as a singlet at -2.43 ppm, while in the NMR, just two kinds of pentafluorophenyl groups were observed in a 2 1 ratio (99CC385). These results indicate that in solution compound 80 exists in a rapid equilibrium between 80a and 80b. 

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