815617-79-9Relevant academic research and scientific papers
Heterobimetallic metallaborane chemistry: Synthesis and characterization of a Lightly Stabilized molybdairidahexaborane, [{Cp*Ir}{(CO)3(THF)Mo}B4H8], and Its Direct Conversion to [{Cp*Ir}{(CO)3(L)Mo}B4H 8] (L = CO, PPh3, NCPh, CNBu, NH3, PPh 3=CHC(O)OMe)
Macias, Ramon,Fehlner, Thomas P.,Beatty, Alicia M.,Noll, Bruce
, p. 5994 - 6001 (2008/10/09)
The reaction of [Cp*IrB4H10] (1) with [{η6-(C6H4)(CH3) 2}Mo(CO)3] in tetrahydrofuran (THF) leads to [Cp*Ir(CO)3(THF)MoB4H8] (2), which was characterized by NMR spectroscopy. Intermediate 2 subsequently decomposes to give the tetracarbonyl analogue [Cp*Ir-(CO)4MoB 4H3] (3). In the presence of free CO, the same reaction constitutes a high-yield synthesis of 3. The treatment of 2 (formed in situ) with different Lewis bases led to the replacement of the THF ligand at the molybdenum center and generation of [Cp*Ir(CO)3-(L)MoB 4H8] (L = PPh3 (4), NCPh (5), CNBu (6), NH 3 (7)). Reaction of the benzonitrile derivative 5 with PPh 3-CHCO2Me afforded the ylide compound [Cp*Ir(CO)3(PPh3=CHCO2-Me)M 0B4H8] (8). All compounds have been spectroscopically characterized, and 3 and 5-7 have been structurally characterized in the solid state. This work demonstrates that, similarly to metal clusters, metallaboranes with labile metal ligands can serve as versatile synthons.
