Abstract
Treatment of the dimer complex [C 5Me 5 (CO) 2 Ru] 2 ( 1) with HBF 4 in CH 2Cl 2 at room temperature yields the hydrido-bridged dinuclear complex [(C 5Me 5) 2Ru 2(CO) 4H]BF 4 ( 2), and after refluxing in propionic anhydride [C 5Me 5(CO) 3Ru]BF 4 ( 5) is obtained, UV-irradiation of 1 in the presence of H 2CHal 2 (Hal = Cl, I) or trimethylphosphine leads to the formation of C 5Me 5(CO) 2Ru-Hal ( 3a, 3b) or C 5Me 5(CO)(Me 3P)RuH ( 4) respectively. Exchange reactions of 3a, 3b with LiAlH 4, NaOMe and Me 3 P give the complexes C 5Me 5(CO) 2RuX ( 6a,6b) (X=H, OMe), C 5Me 5(CO)(Me 3P)Ru-Hal ( 7a,7b) (Hal = Cl, I) and C 5Me 5(Me 3P) 2RuI (8). The interaction of 3b or 5 with Me 3PCH 2 leads to the formation of the ylide complex [C 5Me 5(CO)(Me 3P)-RuCH 2PMe 3)Cl ( 9) or the rutheniumacyl-ylide C 5Me 5(CO) 2RuC(O)CHPMe 3 ( 10). 4 reacts with Me 3PCH 2 to give C 5Me 5(CO)(Me 3P)RuMe ( 11) and Me 3P via the intermediate formation of the phosphonium salt Me 4P[Ru(CO) (Me 3P)-C 5Me 5].
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