title: Syntheses, structures, and properties of intercalation compounds of silver(I) complex with [2.2]paracyclophane.
abstract: Reaction of [2.2]paracyclophane (pcp) with silver(I) trifluoroacetate (AgCF(3)CO(2)) and silver(I) pentafluoroproprionate (AgC(2)F(5)CO(2)) has led to isolation of three novel intercalation polymers: [Ag(4)(pcp)(CF(3)CO(2))(4)](C(6)H(6)) (1), [Ag(4)(pcp)(CF(3)CO(2))(4)](C(6)H(3)Me(3)) (2), and [Ag(4)(pcp)(C(2)F(5)CO(2))(4)](pcp) (3). Structure studies using single crystal X-ray diffraction have shown that all compounds contain two-dimensional layered frameworks based on cation-pi interactions, in which pcp exhibits an unprecedented micro-tetra-eta(2) coordination mode. Guest molecules which weakly interact with the host pcp via C-H.pi interactions are intercalated between layers. The guest-eliminated complexes (1a and 2a) and guest-reincorporated ones (1b or 1c and 2b or 2c), accompanied by small structural changes, were confirmed by (1)H NMR, thermogravimetric analysis, mass spectra, and X-ray powder diffraction patterns. The structural changes from 1 --> 1a --> 1c (=1) can take place reversibly in the process of exposure of 1a to benzene vapor. The original framework of complex 2 is also completely recovered by immersing 2a in mesitylene as well as exposing it to mesitylene vapor.
authors.affiliation: Department of Chemistry, Kinki University, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan. munakata@chem.kindai.ac.jp
authors.forename: Megumu
authors.initials: M
authors.lastname: Munakata
authors.forename: Shu Qin
authors.initials: SQ
authors.lastname: Liu
authors.forename: Hisashi
authors.initials: H
authors.lastname: Konaka
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Kuroda-Sowa
authors.forename: Yusaku
authors.initials: Y
authors.lastname: Suenaga
authors.forename: Masahiko
authors.initials: M
authors.lastname: Maekawa
authors.forename: Hisao
authors.initials: H
authors.lastname: Nakagawa
authors.forename: Yuji
authors.initials: Y
authors.lastname: Yamazaki