Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12779/4031
Title: The Redox Behavior of Ferrocene Derivatives .6. Benzylferrocenes - the Crystal-structure of Decabenzylferrocenium Tetrafluoroborate
Authors: P., Zanello
A., Cinquantini
Mangani, Stefano 
G., Opromolla
L., Pardi
C., Janiak
M. D., Rausch
Keywords: crystal structure; electrochemistry; ferrocene
Issue Date: 1994
Project: None 
Journal: JOURNAL OF ORGANOMETALLIC CHEMISTRY
Abstract: 
The electrochemical behaviour of the benzyl-substituted ferrocenes [(eta5-C5Bz5)2Fe] and [(eta5-C5Bz5)Fe(eta5-C5H5)] in non-aqueous solutions has been examined. As expected, they undergo reversible one-electron removal more easily than ferrocene itself, but with significantly more difficulty than [(eta5-C5R5)2Fe] (R = Me or Et). In dichloromethane solution, the formal electrode potentials (vs. SCE) are as follows: E-degrees'([(C5Bz5)2Fe]+/0) = +0.38 V, E-degrees'([(C5Me5)2Fe]+/0) = -0.10 V, E-degrees'([(C5Et5)2Fe]+/0) = -0.06 V, E-degrees'([(C5H5)2Fe]+/0) = +0.45 V. The electrochemical properties suggest that the [(C5Bz5)2Fe]+/0 redox change should be accompanied by minor, but detectable geometrical strains. In order to define more quantitatively the geometrical reorganization accompanying such electron removal processes, the X-ray structure of [(C5Bz5)2Fe][BF4] has been determined. Comparison with the previously determined structure of neutral [(C5Bz5)2Fe] shows an elongation of about 0.05 angstrom of the Fe-C(cyclopentadienyl) distances, which is a common feature of all ferrocene/ferrocenium couples, but this is also accompanied by reorganization of the peripheral benzyl substituents. In the neutral precursor, the methylene fragments are tilted away from the plane of the cyclopentadienyl rings towards the iron atom, whereas in the monocation they become coplanar.
Description: 
47986
URI: http://hdl.handle.net/20.500.12779/4031
ISSN: 0022-328X
DOI: 10.1016/0022-328X(94)88122-7
Appears in Collections:Publications

Show full item record

Page view(s)

1
Last Week
0
Last month
1
checked on May 15, 2021

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.