Synthesis, characterization, and reactivity of iron-dienyl complexes
Journal
Organometallics
Journal Volume
6
Journal Issue
10
Pages
2094-2099
Date Issued
1987
Author(s)
Abstract
A series of complexes of the type CpFe(CO)2(η1-R) [R ~ pd (1); R = hd (4); Cp = C5H5, pd = 2,4-pentadien-l-yl, hd = 2,4-hexadien-l-yl], CpFe(CO)(η3-R) [R = pd (2); R = hd (5)], and CpFe(?75-R) [R = pd (3); R = hd (6)] has been prepared and characterized with appropriate physical methods. Among these complexes, an X-ray diffraction study of 5 is reported; crystallographic data: space group P2t/c, a = 7.648 (7) A, b = 9.743 (3) A, c = 14.664 (5) A, £ = 97.45 (5)°, V = 1083 (8) A3, and Z = 4. The structure parameters are refined to convergence with R = 0.034 and Rw- 0.030 for 890 reflections having I > 3 3a{I). The coordination geometry about the iron center approximates a distorted tetrahedron with the carbonyl, the Cp group, and the olefin occupying the four coordination sites. In the reaction of HPF6 with η-dienyl complexes 1 and 4, the proton directly attacks on the 7- and e-carbons of the ligand to give the corresponding 7j2-diene cations in various amounts. © 1987, American Chemical Society. All rights reserved.
Type
journal article