Text this: ELECTRON-RICH CATIONS - PREPARATION AND HYDRIDE REDUCTIONS OF THE CATIONS [FE(ETA-5-C5H5)(PHP(CH2CH2PPH2)2)]+, [FE(ETA-5-C5H5)(MEC(CH2PPH2)3)]+, AND [FE(ETA-5-C5H5)(C(CH2PPH2)4)]+