Intramolecular C-H center dot center dot center dot pi interactions in metal-porphyrin complexes
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Cambridge Structural Database (CSD) was screened in order to find intramolecular C-H...pi interactions with a chelate ring of coordinated porphyrin. It was found 154 crystal structures with 244 intramolecular C-H...pi interactions in transition metal complexes with derivatives of porphyrin. Comparison of interacting distances indicates that interactions of hydrogen atoms in positions 2 and 6 of axially coordinated pyridine are more favorable with ruffled than with planar porphyrin.
Keywords:C-H center dot center dot center dot pi interactions / transition metal complexes / chelate ring / porphyrin / axial ligands
Source:International Journal of Molecular Sciences, 2004, 5, 4-7, 174-185
- Mdpi Ag, Basel
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