title: An inclusion complex of hexamolybdate inside a supramolecular cage and its structural conversion.
abstract: A self-assembled cage compound consisting of four concave ligands and two square-planar-coordinated Pd(II) ions was found to quantitatively encapsulate a hexamolybdate dianion [Mo(6)O(19)](2-) in solution. The addition of 1 equiv more of [Mo(6)O(19)](2-) to the inclusion complex resulted in the formation of a precipitate from which single crystals were grown. X-ray analysis showed that a structural conversion had taken place upon crystallization: one hexamolybdate anion was found to be wrapped in a chiral, cyclic arrangement of three ligands in the absence of any Pd(II) ions to give a compound of the formula {[Mo(6)O(19)](2-)@(ligand)(3)+2H(+)}. We postulate the stabilization of this arrangement by attractive C-H···O and CF(3)-pyridine interactions.
authors.affiliation: Institute of Inorganic Chemistry, Georg-August University of Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany.
authors.forename: Muxin
authors.initials: M
authors.lastname: Han
authors.forename: Jakob
authors.initials: J
authors.lastname: Hey
authors.forename: Wataru
authors.initials: W
authors.lastname: Kawamura
authors.forename: Dietmar
authors.initials: D
authors.lastname: Stalke
authors.forename: Mitsuhiko
authors.initials: M
authors.lastname: Shionoya
authors.forename: Guido H
authors.initials: GH
authors.lastname: Clever
mesh_terms: D046911:Macromolecular Substances / Q000138:chemical synthesis / Q000737:chemistry; D008958:Models, Molecular; D015394:Molecular Structure; D008982:Molybdenum / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry
chemical_list: D046911:Macromolecular Substances; D009942:Organometallic Compounds; D011725:Pyridines; C044659:molybdate; D008982:Molybdenum; C023666:pyridine