摘要:
Binuclear ruthenocenes bridged by ethenes and thiophene derivatives, Rc-CH=CH-Z-Rc and Rc*-CH=CH-Z CH=CH-Rc* (Z = thiophene, thieno[3,2-b]thiophene, and 2,2'-bithiophene; Rc = ruthenocenyl, R* = 1',2',3',4',5'-pentamethylruthenocenyl) were prepared. These complexes showed a one-step two-electron redox wave in the cyclic voltammograms, in contrast to the benzenoid-bridged dinuclear ruthenocenes. The chemical oxidation of the Rc-CH=CH-Z-Rc complexes gave no stable oxidized species. The two-electron oxidized species of the Rc*-CH=CH-Z-CH=CH-Rc* complexes were comparably stable and contained a fulvene-complex type structure. (C) 2007 Elsevier B.V. All rights reserved.