A highly hexane soluble lithium salt and other starting materials of the fluorinated weakly coordinating anion [Al{OC(CF3)2(CH 2SiMe3)}4]-

Abstract

The lithium salt of the weakly coordinating alkoxyaluminate anion Li[Al(OC(CF3)2(CH2SiMe3)) 4] (2) is soluble in polar and even in non-polar solvents. Especially the solubility in n-hexane confirms 2 to be an excellent candidate for Li ion catalysis. Its polymeric structure consists of a seven coordinated Li + cation, coordinating a [Al(OC(CF3)2(CH 2SiMe3)]- anion that serves as hexadentate O2F4 ligand and a further bridging F atom of a second anion. Compound 2 reacts with ClCPh3 giving the [CPh 3]+ salt which is at least stable in CD2Cl 2 over days at 298 K, but decomposes after storage at 333 K for several days. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.