389627-78-5Relevant articles and documents
Reactions of carbaalanes with HBF4 and HCl: A μ3-bridging fluorine atom in (AlEt)7(C=CHPh)2(CCH2Ph)3(μ3 -F) versus a terminal chlorine atom in (AlMe)7(AlCl)(CCH2Ph)5H
Uhl, Werner,Breher, Frank,Neumüller, Bernhard,Lützen, Arne,Saak, Wolfgang,Grunenberg, J?rg
, p. 5478 - 5484 (2001)
The carbaalane cluster (AlEt)7(C=CHC6H5)2(CCH2 C6H5)3H (2) reacted with HBF4·OEt2 to yield the fluorine derivative (AlEt)7(C=CHC6H5)2 (CCH2C6H5)3(μ3-F) (4) by the replacement of its bridging hydrogen atom and the cleavage of a B-F bond. The fluorine atom bridges three aluminum atoms with the Al-F distances in a narrow range between 1.97 and 2.00 A?. A similar reaction was observed with the arachno-carbaalane (AlMe)8(CCH2C6H5)5H (1). However, an impure product was isolated which could not be purified by repeated recrystallization. In contrast, use of HCl instead of HBF4·OEt2 as a proton donor did not result in substitution of the bridging hydrogen atom of 1, but a methyl group at the bottom of the cluster was replaced by release of methane. The compound (AlMe)7(AlCl)(CCH2C6H5)5 (μ-H) (6), which possesses a terminally bonded chlorine atom, was formed.