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- W2010408457 abstract "Abstract Reactions of Fe(C 5 H 5 )(CO) 2 Br with two equivalents of CNR give Fe(C 5 H 5 )(CNR) 2 Br compounds (R = C 6 H 5 , p -C 6 H 4 Me, m -C 6 H 4 Me, p -C 6 H 4 OMe, m -C 6 H 4 OMe, p -C 6 H 4 F, m -C 6 H 4 Cl, m -C 6 H 4 CF 3 , p -C 6 H 4 NO 2 ). With excess CNR cationic complexes [Fe(C 5 H 5 )(CNR) 3 ] + are formed. Reactions of [Fe(C 5 H 5 )(CO) 2 (THF)]PF 6 and p -CNC 6 H 4 F give [Fe(C 5 H 5 )(CO) 3− n ( p -CNC 6 H 4 F) n ]PF 6 ( n = 1 or 2, determined by stoichiometry). The Fe(C 5 H 5 )(CNR) 2 Br compounds are shown to undergo one-electron oxidation processes; the required potentials for oxidation ( E 1 2 ) correlate well with Hammett σ p or σ m constants for substituents on the aryl rings. Chemical and electrochemical oxidations of several Fe(C 5 H 5 )(CNR) 2 Br compounds were attempted but only [Fe(C 5 H 5 )(CNR) 3 ]PF 6 species are obtained. The process using AgPF 6 in acetone was followed by NMR. A rapid reaction of these reagents to give a red solution is seen; this red solution may contain as many as six intermediates. These intermediates convert slowly (a period of hours) to the final product, [Fe(C 5 H 5 )(CNR) 3 ]PF 6 . Speculation is offered that among the intermediates are the compounds [Fe(C 5 H 5 )(CNR) 2 (acetone)]PF 6 and [Fe(C 5 H 5 )(CNR) 2 BrFe(C 5 H 5 )(CNR) 2 ]PF 6 ; the latter is a halide bridged species. Using a different solvent, MeCN, a stable product, [Fe(C 5 H 5 )(CNPh) 2 (MeCN)]PF 6 , analogous to the acetone complex is obtained." @default.
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- W2010408457 date "1979-10-01" @default.
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- W2010408457 title "Syntheses, an electrochemical study, and some chemical reactions of Fe(C5H5)(CNR)2X compounds" @default.
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- W2010408457 doi "https://doi.org/10.1016/s0022-328x(00)91745-5" @default.
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