[(eta(5)-C(5)Me(5))Ru](+) coordinates to the six-membered aromatic rin
gs of the bifluorenylidene (BFD) chromophore to afford mononuclear [(e
ta(5)-C(5)Me(5))Ru(BFD)](+) and dinuclear [[(eta(5)-C(5)Me(5))Ru](2)(B
FD)](2+) compounds which could be isolated as trifluoromethane sulfona
te salts, 1(OTf) and 2(OTf)(2), respectively. The X-ray structure of 1
was determined and both compounds were studied by spectroelectrochemi
cal methods and their reduced species by EPR.