[trans-Fe(H(2))(CO)(dppe)(2)](2+) (3) (dppe = 1,2-bis(diphenylphosphino)ethane) was generated by protonation of [trans-FeH(CO)(dppe)(2)](+) in CD(2)Cl(2). [trans-Fe(H(2))(CO)(depe)(2)](2+) (6) (depe = 1,2-bis(diethylphosphino)ethane) was generated by the treatment of [trans-FeCl(CO)(depe)(2)](+) in CD(2)Cl(2) with AgSbF(6) under 1 atm of H(2). Complex 3 is more acidic than trifluoromethanesulfonic
                                    [trans-Fe(H(2))(CO)(dppe)(2)](2+)(3)(dppe = 1,2-双(
二苯基膦基)
乙烷)是通过[trans-FeH( CD(2)Cl(2)中的CO)(dppe)(2)](+)。[trans-Fe(H(2))(CO)(depe)(2)](2+)(6)(depe = 1,2-双(
二乙基膦基)
乙烷)通过[trans-FeCl在H(2)的1个大气压下用AgSbF(6)在CD(2)Cl(2)中的(CO)(depe)(2)](+)。在CD(2)Cl(2)中,配合物3比
三氟甲磺酸(HOTf)酸性更高,而怀疑6比[Et(2)OH](+)酸性更低。3 [OTf](2)对H(2)的损失在减压下稳定了几个小时,表明存在强三中心(Fe-H(2)),两电子sigma键。配合物3和6都经历H(2)取代反应。有证据表明[反式Fe(H(2)O)(CO)(dppe)(2)](2+)和[反式Fe