Physical properties of interannular bridged ferrocenophanium salts: structural, NMR, EPR and M?ssbauer studies
Resource
Journal of Organometallic Chemistry 414 (2): 227-244
Journal
Journal of Organometallic Chemistry
Journal Volume
414
Journal Issue
2
Pages
227-244
Date Issued
1991
Date
1991
Author(s)
Dong, Teng-Yuan
Lin, Hsiu-Mei
Hwang, Ming-Yhu
Lee, Ting-Yu
Tseng, Li-Hong
Lee, Gene-Hsiang
Abstract
The X-ray structure of 1,1′-(propane-1,3-diyl) ferrocenium iodide has been determined at 298 K: monoclinic, C2/c, a = 15.986(3), b = 15.125(3), c = 21.793(3) Å, and β = 93.555(11)°; Z = 8, Dcalcd = 2.597 g cm - 3, RF = 0.044, and RWF = 0.050. The compound 1,1′-(pentane-1,5-diyl) ferrocenium triiodide cyrstallizes in the triclinic space group P1ovbr: with four molecules in a unit cell with dimensions a= 9.5435(14), b = 13.1195(22), c = 15.2591(23) Å, α = 106.317(13), β = 85.978(12), γ = 90.872(13)°. The final discrepancy factors are RF = 0.062 and R WF = 0.063. The physical properties of ferrocenophanium salts are reported. The EPR and Mössbauer results suggest that the electronic ground state of the interannular bridged ferrocenophanium cations is 2E2g. The changes of quadrupole splittings, proton chemical shifts, and low-symmetry parameters can be explained in terms of tilting of the Cp ring from parallel geometry. © 1991.
Type
journal article
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