132645-87-5Relevant articles and documents
The anion [Mg6Cl8Cp*5]-: A final intermediate on the way to the molecular donor-free grignard compound MgClCp*?
Vollet, Jean,Hartig, Jens R.,Baranowska, Katarzyna,Schnoeckel, Hansgeorg
, p. 2101 - 2103 (2006)
The reaction at - 70 °C of decamethylmagnesocene MgCp* 2 (Cp* = pentamethylcyclopentadienyl) with monovalent aluminum chloride, AlCl, stabilized with diethyl ether and dissolved in toluene, results in tetrameric tetrahedrotetrakis- (pentamethylcyclopentadienylaluminum), [AlCp*]4, and the dimeric bis(pentamethylcyclopentadienylmagnesium chloride diethyl etherate), [MgCp*Cl·Et2O]2. At a slightly higher temperature and by stepwise decrease of the diethyl ether concentration before reaction, a preferred formation of metal clusters such as dodekakispentamethylcyclopentadienylpentacontaaluminum, Al 50Cp*12, was frequently observed. Interestingly, after working up the residue of this reaction, a new kind of Grignard compound could be isolated. We report here on the synthetic details and X-ray structure of a donor-free Grignard compound with an inverse magnesocene motif, μ-Cp*Mg2, in the anionic part of the compound, [Mg 6Cl8Cp*5][AlCp*2]·C 6H6(1).
