Stepwise Halide‐Triggered Double and Triple Catenation of Self‐Assembled Coordination Cages |
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| Authors: | Rongmei Zhu Jens Lübben Priv‐Doz?Dr Birger Dittrich Prof?Dr Guido H Clever |
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| Affiliation: | 1. Institute of Inorganic Chemistry, Georg‐August University G?ttingen, Tammannstrasse 4, 37077 G?ttingen (Germany) http://www.clever‐lab.de;2. Institute of Inorganic and Applied Chemistry, University of Hamburg, Martin‐Luther‐King‐Platz 6, 20146 Hamburg (Germany) |
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| Abstract: | A simple self‐assembled Pd2 L 4] coordination cage consisting of four carbazole‐based ligands was found to dimerize into the interpenetrated double cage 3 X@Pd4 L 8] upon the addition of 1.5 equivalents of halide anions (X=Cl?, Br?). The halide anions serve as templates, as they are sandwiched by four PdII cations and occupy the three pockets of the entangled cage structure. The subsequent addition of larger amounts of the same halide triggers another structural conversion, now yielding a triply catenated link structure in which each PdII node is trans‐coordinated by two pyridine donors and two halide ligands. This simple system demonstrates how molecular complexity can increase upon a gradual change of the relative concentrations of reaction partners that are able to serve different structural roles. |
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| Keywords: | cage compounds carbazole host– guest systems supramolecular chemistry systems chemistry |
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