SYNTHESES AND X-RAY CRYSTAL-STRUCTURES OF 5-COORDINATED AND 6-COORDINATED IRON(I) AND IRON(II) COMPLEXES WITH THE SAME (ETA(5)-C(5)ME(5))FE(DPPE) FRAMEWORK
P. Hamon et al., SYNTHESES AND X-RAY CRYSTAL-STRUCTURES OF 5-COORDINATED AND 6-COORDINATED IRON(I) AND IRON(II) COMPLEXES WITH THE SAME (ETA(5)-C(5)ME(5))FE(DPPE) FRAMEWORK, Organometallics, 15(1), 1996, pp. 10-12
The one electron reduction of CpFe(dppe)(OSO2CF3) (2) with cobaltocen
e gave the d(7) iron(I) CpFe(dppe) (3, 90%) as thermally stable orang
e crystals, whereas the one-electron oxidation of 3 with ferrocenium h
exafluorophosphate afforded the new d(6) iron(II) 16-electron complex
[CpFe(dppe)][PF6] (4, 98%) isolated as an stable orange powder. The X
-ray crystal structures of 3 and 4 show that their major structural di
fference concerns the ''pyramidalization'' of the metal center.