title: Coordination-driven self-assembly of a discrete molecular cage and an infinite chain of coordination cages based on ortho-linked oxacalix[2]benzene[2]pyrazine and oxacalix[2]arene[2]pyrazine.
abstract: Coordination-driven self-assembly of ortho-linked oxacalix[2]benzene[2]pyrazine (1) as well as oxacalix[2]arene[2]pyrazine (2) with a silver cation resulted in the formation of a discrete molecular cage (3) and a one-dimensional chain of coordination cages (4), respectively. Single crystal X-ray diffraction analysis confirmed the structures of 3 and 4. The silver ions in 3 adopted tetrahedral coordination geometries while the silver ions in 4 adopted square-planar coordination geometries. The void of the metal-containing cage 3 was occupied by a methyl group of an acetonitrile bonded to a neighboring cage in the solid state, and one benzene ring was found to reside in the void of each cage of complex 4.
authors.affiliation: Division of Supramolecular Chemistry and Medicinal Chemistry, Key Laboratory of Brain Functional Genomics, MOE & STCSM, Shanghai Institute of Brain Functional Genomics, East China Normal University, Shanghai 200062, China.
authors.forename: Ming-Liang
authors.initials: ML
authors.lastname: Ma
authors.forename: Xiao-Yan
authors.initials: XY
authors.lastname: Li
authors.forename: Ke
authors.initials: K
authors.lastname: Wen
mesh_terms: D001555:Benzene Derivatives / Q000737:chemistry*; D047250:Calixarenes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D015394:Molecular Structure; D011719:Pyrazines / Q000737:chemistry*
chemical_list: D001555:Benzene Derivatives; D011719:Pyrazines; D047250:Calixarenes