Reduction of the cation [η5-C5H5) Fe(tripod)] PF6 with lithium aluminium hydride gives (η5-C5H5)FeH-(tripod)via an SN1 mechanism, involving prior dissociation of a phosphine ligand leading to direct attack of hydride on the metal, in contrast with the related ruthenium cations [(η5-C5H5)RuL3]PF6(L3= triphos or tripod) which give the cyclopentadiene complexes (η4-C5H6RuL3via exo-hydride attack on the cyclopentadienyl ligand [tripod =(Ph2PCH2)3CMe; triphos =(Ph2-PCH2CH2)2PPh].
阳离子 [δ-5-
C5H5)Fe(三足鼎立)] PF6 与
氢化铝锂通过 SN1 机制还原生成 (δ-5- )FeH-(三足鼎立),其中涉及
膦配体的先期解离导致
氢化物直接攻击
金属、与此相反,相关的
钌阳离子[(δ-5- )RuL3]PF6(L3=三
磷或三绊)产生
环戊二烯配合物(δ-4-C5H6RuL3通过
环戊二烯配体上的外
氢化物攻击[三绊 =(Ph2PCH2)3CMe;triphos=(Ph2-PCH2CH2)2PPh]。