摘要:
Dropwise addition of an excess amount of HBF4. OEt2 through a pressure equalizing funnel to (eta (4)-BuC5H5) Fe(CO)(2)PPh3-nPyn resulted in [(eta (5) -BuC5H4)Fe(CO)(2)PPh3-n Py-n(+)][BF4-]. The smooth abstraction of the endo-H atom of (eta (4)-BuC5H5)Fe(CO)(2)PPh3-nPyn is a result of the hydridic nature of this hydrogen. HBF4. OEt2 which worked better than an other Lewis acid, Ph3C+PF6-, because the H-2 produced in the course of the reaction could be removed, whereas Ph3CH remains in the solution along with a catonic species which is partially soluble in THF. The hydride abstraction of the neutral complexes was followed spectroscopically.