The reaction of [RhCl(eta(4)-Ph2R2C4CO)](2) (R = Ph, 2-naphthyl) with the dimeric complexes [RuCl2(p-cymene)](2) p-cymene = 1-methyl-4-(1-methylethyl)benzene, [RuCl2(1,3,5-Et3C6H3)](2), [MCl2(Cp*)](2) (M = Rh, Ir; Cp* = 1,2,3,4,5-pentamethylcyclopenta-2,4-dien-1-yl), [RuCl2(CO)(3)](2), [RuCl2(dcypb)(CO)](2) (dcypb=butane-1,4-diylbis[dicyclohexylphosphine]), [(dppb)ClRu(mu-Cl)(2)(mu-OH2)RuCl(dppb)] (dppb = butane-1,4-diylbis[diplienylphosphine]), and [(dcypb)(N-2)Ru(mu-Cl)(3)RuCl(dcypb)] was investigated. In all cases, mixed, chloro-bridged complexes were formed in quantitative yield (see 5-8, 9-16, 18, 19, 21, and 22). The six new complexes 5, 8, 9 13, 15, and 22 were characterized by single-crystal X-ray analysis (Figs. 1-3).