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NMR‐Based Structure Determination of an Intertwined Coordination Cage Resembling a Double Trefoil Knot
Author(s) -
Engelhard David M.,
Freye Sabrina,
Grohe Kristof,
John Michael,
Clever Guido H.
Publication year - 2012
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201200611
Subject(s) - trefoil , supramolecular chemistry , trefoil knot , knot (papermaking) , ion , quantum entanglement , crystallography , chemistry , computer science , theoretical physics , knot theory , physics , stereochemistry , materials science , crystal structure , art , quantum mechanics , organic chemistry , visual arts , composite material , quantum
A knot that ties itself! The entanglement of six ligands coordinated to three Pd II ions results in the quantitative formation of a walnut‐shaped supramolecular cage. Each of the two hemispheres resembles a trefoil knot. The solution‐state structure was elucidated using a combination of NMR experiments and calculated model structures. The final structure was selected from several models by topological analyses and encapsulation of chiral camphorsulfonate ions.