title: Calix[4]thiacrowns as ditopic hosts for homo- and heterobinuclear accommodation: first report of a chopsticks-type pi-coordination.
abstract: [reaction: see text] Calix[4]thiacrowns with hetero-L(1) and a homodonor set (L(2)) were synthesized and characterized by X-ray analysis. From the reaction of L(2) with AgPF(6), disilver complex [Ag(2)(L(2))](PF(6))(2) (1) was isolated. By comparing 1,3-alternate conformations of L(2) and 1, we found a considerable decrease of dihedral angles of two opposite aromatic rings upon complexation. This finding can be explained in terms of the "chopsticks process", which illustrates how Ag(+)-arene pi-coordination occurs. Heterobinuclear complexation of L(1) in solution was also observed.
authors.affiliation: Department of Chemistry (BK21) and Institute of Natural Science, Gyeongsang National University, Jinju 660-701, Korea.
authors.forename: Jai Young
authors.initials: JY
authors.lastname: Lee
authors.forename: Jongchul
authors.initials: J
authors.lastname: Kwon
authors.forename: Chul Soon
authors.initials: CS
authors.lastname: Park
authors.forename: Ji-Eun
authors.initials: JE
authors.lastname: Lee
authors.forename: Wonbo
authors.initials: W
authors.lastname: Sim
authors.forename: Jong Seung
authors.initials: JS
authors.lastname: Kim
authors.forename: Joobeom
authors.initials: J
authors.lastname: Seo
authors.forename: Il
authors.initials: I
authors.lastname: Yoon
authors.forename: Jong Hwa
authors.initials: JH
authors.lastname: Jung
authors.forename: Shim Sung
authors.initials: SS
authors.lastname: Lee