Structure of (η5-cyclopentadienyl)(η6-p-isopropylnitrobenzene)iron(II) trifluoroacetate at 198 K

(η5-Cyclopentadienyl)[η6-diethyl ethyl(phenyl)malonate]iron(II) hexafluoridophosphate

“…3.0 (4)° reported for the most similar structure of 1,1-di(2-propenyl)-3-butenylbenzene FeCp complex (Marcén et al, 2002). The Fe ion is located at distances of 1.6661 (9)Å from the Cp and 1.5360 (8)Å from the phenyl ring; such values are typical of those found in the literature for similar complexes (see for example Abboud et al, 1991;Piórko et al, 1994;Marcén et al, 2002;Crane 2003). The distance for Fe1-C11 at 2.1179 (19) Å, where C11 is the quaternary carbon in the phenyl ring, is the longest among the distances Fe to C atoms of this ring.…”

Organo-Iron Benzaldehyde-Hydrazone Complexes. Synthesis, Characterization, Electrochemical, and Structural Studies

“…Key bond lengths and angles for 6 + and 19 + are listed in Table , and details of data collection and refinement are summarized in Table . High anisotropic thermal motion and/or disorder was observed for the carbon atoms of the Cp ligand in 19 + (Figure ), a phenomenon frequently encountered in such mixed-sandwich derivatives. ,,, The observed orientation is presumably due to partial rotation of the C 5 ring about the Fe−Cp centroid axis. Inspection of the bond distances and angles between the two rings (see Table ) clearly indicates a η 5 -Fe-η 6 coordination mode for both compounds. − More interestingly, in view of their solid-state structures, the phenyl rings of 6 + and 19 + show good coplanarity (dihedral angles between two phenyl rings are 4.9° and 6.2°, respectively), which is important for an efficient π-electron delocalization along the entire backbone and thus might ensure a large molecular nonlinearity in the crystalline solid 7c.…”