Abstract
Analysis of the crystal packing of the title porphyrin derivative (C72H54N4O4) suggests no classical hydrogen bonds between neighbor molecules. X-ray crystal structure shows that all benzyl units of this porphyrin have close C–H⋯π weak contacts with phenyl or porphyrinyl units forming a network of porphyrin rings. Also C–H⋯O and parallel aromatic–aromatic weak interactions play an important role in structure extension. All of these interactions control the crystal packing of molecules. X-ray diffraction was used to perform single crystal analysis. The structure was solved in the triclinic space group P-1, with unit cell parameters: a = 8.0597(3) Å, b = 11.6862(4) Å, c = 14.2572(5) Å, α = 96.173(3)°, β = 93.150(4)°, and γ = 93.679(3)°, V = 1329.72(8) Å3, Z = 1.Graphical abstractThe lack of strong intermolecular hydrogen bonds and presence of numerous weak hydrogen bonds are decisive factors in crystal structure of the examined meso-tetrakis[4-(benzyloxy)-phenyl]porphyrin.
Highlights
The color of porphyrins derived from a characteristic central ring results from the electronic properties of these compounds
We report here the crystallographic structure of an asymmetric meso-tetrakis[4-(benzyloxy)phenyl]porphyrin (Scheme 1)
Similar situation occurs between phenyl rings attached directly to porphyrin rings in positions 10 and 20
Summary
The color of porphyrins derived from a characteristic central ring results from the electronic properties of these compounds. In the molecule reported one could clearly discern such type of interactions and their effect on localization of porphyrin molecules in the crystal structure. We report here the crystallographic structure of an asymmetric meso-tetrakis[4-(benzyloxy)phenyl]porphyrin (Scheme 1).
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