Abstract
Inclusion compound of a macrocyclic cavitand cucurbit[8]uril (C 48H 48N 32O 16, CB[8]) with a square-planar palladium(II) complex of a polyamine ligand cyclam, {[Pd(cyclam)]@CB[8]}Cl 2·16⅓H 2O ( 1), was synthesized and characterized by X-ray crystallography, elemental analysis, IR, and electrospray ionization (ESI) mass spectrometry. The complex [Pd(cyclam)] 2+ undergoes chemical oxidation within the CB[8] cavity leading to the formation of the palladium(IV) inclusion compound { trans-[Pd(cyclam)Cl 2]@CB[8]}Cl 2·14H 2O ( 2). The Pd(II) and Pd(IV) complexes are completely encapsulated within the CB[8] cavity. The cyclam ring in 1 and 2 adopts the most stable configuration ( trans-III (S,S,R,R)).
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