[Ru2(p-PriC6H4Me)2(μ-Cl)Cl]2; potassium tert-butylate; 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene in 1,1-dimethylpropan-1-ol T=120°C; 16 h; Inert atmosphereSchlenk technique;