Calix[4]thiacrowns as ditopic hosts for homo- and heterobinuclear accommodation: first report of a chopsticks-type pi-coordination.
[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.
Lee
Jai Young
JY
Department of Chemistry (BK21) and Institute of Natural Science, Gyeongsang National University, Jinju 660-701, Korea.
Kwon
Jongchul
J
Park
Chul Soon
CS
Lee
Ji-Eun
JE
Sim
Wonbo
W
Kim
Jong Seung
JS
Seo
Joobeom
J
Yoon
Il
I
Jung
Jong Hwa
JH
Lee
Shim Sung
SS