Figure 2 Deviations of the individual atoms (Å) from the mean plane of the 24-membered porphyrin core in (a) (I) and (b) (II), indicative of similar severe ruffling of the macrocycle in the two compounds. [Symmetry codes: (i) x, y, z; (ii) −y, x, −z + 1; (iii) −x, −y, z; (iv) y, −x, −z + 1.]