SYNTHESIS OF THE CATIONIC COMPLEXES [(C(5)H(4)CPH(2))(2)RU](2- MOLECULAR AND CRYSTAL-STRUCTURES OF (4)RUC(5)H(4)CPH(2)](+)[CF3SO3](-)CENTER-DOT-CHCL3 AND [C(5)H(5)RUC(5)H(4)CPH(2)](PF6-)-P-+() AND [PH(2)(HO)CC(5)H(4)RUC(5)H(4)CPH(2)](+) )

The formation of the previously unknown [(C(5)H(4)CPh(2))(2)Ru](2+) di cation was established by H-1 and C-13 NMR spectroscopy. This cation r eadily hydrolizes to form the monocation, [Ph(2)(HO)CC5H4RuC5H(4)CPh(2 )](+). The latter was characterized by NMR spectroscopy and X-ray stru ctural analysis. For comparison, [C(5)H(5)RuC(5)H(4)CPh(2)](PF6-)-P-was also studied by X-ray structural analysis. The increase in the M-C -alpha distance and the decrease in the angle of inclination of the CP h(2) group to the metal atom in disubstituted ruthenocene compared to those in monosubstituted ruthenocene is related to the presence of a b ulky substituent in the second Cp ligand and is likely due to the crys tal packing effect. IR spectra and X-ray structural analysis attest to the existence of the OH ... OSO2CF3 hydrogen bond in crystals of the trifluoromethanesulfonate monocation.