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Figure 4
Ball-and-stick representations of the porphyrin molecules in (a) (I)[link] (only one of the two units is shown, as both have very similar conformations), (b) (II)[link] and (c) (III)[link]. The figures show the saddle-type distortion of the porphyrin cores from planarity in (I)[link] and (II)[link], and to a lesser extent in (III)[link], which is required to minimize repulsion between the inner pyrrole H atoms.

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 65| Part 1| December 2009| Pages o3-o7
doi:10.1107/S0108270108040018
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