Cyclopentadienylaluminum thiolates – synthesis and structure

The dicyclopentadienylaluminum thiolates [Cp2Al(μ-SR)]2, where R = Et (1), iPr (2), were obtained by reacting Cl2AlSR with CpNa at the molar ratio 1:2, respectively. Use of CpLi instead of CpNa at the same molar ratio of reagents leads to the formation of cyclopentadienyl(chloro)aluminum thiolates [Cp(Cl)Al(μ-SR)]2, exclusively, where R = Et (3), iPr (4), iBu (5), and nBu (6). The compounds were characterized by 1H, 13C, and 27Al NMR spectroscopy. The structures of the compounds 1 and 4 were determined by X-ray crystallography.