New di-ferrocenyl-ethynylpyridinyl triphenylphosphine copper halide complexes and related di-ferricenyl electro-crystallized materials

H.H. Shah, R.A. Al-Balushi, M.K. Al-Suti, M.S. Khan, F. Marken, A.L. Sudlow, Gabriele Kociok-Kohn, C.H. Woodall, P.R. Raithby, K.C. Molloy

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Abstract

Three new neutral di-ferrocenyl-ethynylpyridinyl copper complexes, [L (CuCl)(PPh)] (2), [L (CuBr)(PPh)] (3), and [L (CuI)(PPh)] (4) were synthesized from the ferrocenyl-ethynylpyridine ligand (L) (1), the appropriate copper halide CuX (with X = Cl, Br, I) and triphenylphosphine. These neutral complexes were fully characterized by spectroscopic methods and by single crystal X-ray crystallography. Cyclic voltammetry in dichloroethane revealed chemically reversible ferrocenyl oxidation signals followed by characteristic "stripping reduction peaks" showing evidence for oxidation-product electro-crystallization. Scanning electron microscopy confirmed spontaneous formation of crystalline oxidation products with three distinct morphologies for X = Cl, Br, I. Energy dispersive X-ray elemental analysis data show Fe:P ratios of 1:2.0, 1:2.1 and 1:2.1 for electro-crystallization products of complexes 2, 3, and 4, respectively, indicating the presence of two [PF ] anions in the vicinity of the dioxidized complexes, and suggesting product formulae [2][PF] , [3][PF] and [4][PF].
Original languageEnglish
Pages (from-to)9497-9507
Number of pages11
JournalDalton Transactions
Volume43
Issue number25
DOIs
Publication statusPublished - 7 Jul 2014

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    Shah, H. H., Al-Balushi, R. A., Al-Suti, M. K., Khan, M. S., Marken, F., Sudlow, A. L., Kociok-Kohn, G., Woodall, C. H., Raithby, P. R., & Molloy, K. C. (2014). New di-ferrocenyl-ethynylpyridinyl triphenylphosphine copper halide complexes and related di-ferricenyl electro-crystallized materials. Dalton Transactions, 43(25), 9497-9507. https://doi.org/10.1039/c3dt52914b