Synthesis and electrochemical properties of mono- and (�)-1,2-dialkylferrocenes and alkylferrocenium hexafluorophosphates in aqueous and micellar media
摘要:
Simple methods have been developed for the preparation of a series of n-alkylferrocenes H(CH2)(n)Fc (n = 3, 5-8, or 12) based on Friedel-Crafts acylation of ferrocenes followed by reduction of the corresponding ketones with Zn amalgam. The properties of H(CH2)(n)Fc and the corresponding ferrocenium ions in micellar aqueous solutions and the behavior of water-soluble cations H(CH2)(n)Fc(+) in the absence of micelles were studied by cyclic voltammetry. In all cases, the formal redox potentials of ferrocenes (E(o)') increase linearly as n increases up to 8. Whether micelles are present or not, the corresponding correlation equation has the following form: E(o)' = alpha + beta n, where beta approximate to 29 mV in all cases. The synthesis of (+/-)-1-ethyl-2-methylferrocene from racemic alpha-dimethylaminoethylferrocene is reported.
Synthesis and electrochemical properties of mono- and (�)-1,2-dialkylferrocenes and alkylferrocenium hexafluorophosphates in aqueous and micellar media
摘要:
Simple methods have been developed for the preparation of a series of n-alkylferrocenes H(CH2)(n)Fc (n = 3, 5-8, or 12) based on Friedel-Crafts acylation of ferrocenes followed by reduction of the corresponding ketones with Zn amalgam. The properties of H(CH2)(n)Fc and the corresponding ferrocenium ions in micellar aqueous solutions and the behavior of water-soluble cations H(CH2)(n)Fc(+) in the absence of micelles were studied by cyclic voltammetry. In all cases, the formal redox potentials of ferrocenes (E(o)') increase linearly as n increases up to 8. Whether micelles are present or not, the corresponding correlation equation has the following form: E(o)' = alpha + beta n, where beta approximate to 29 mV in all cases. The synthesis of (+/-)-1-ethyl-2-methylferrocene from racemic alpha-dimethylaminoethylferrocene is reported.
作者:Walther G Jary、Arnulf-Kai Mahler、Thomas Purkathofer、Judith Baumgartner
DOI:10.1016/s0022-328x(01)00862-2
日期:2001.6
Alkenylferrocenes, FcCHCHR [R = (CH2)(n)CH3, n = 0-4], and 1,1 ' -bisalkenylferrocenes, Fc(CHCHR)(2) (R = CH3, CH2CH3) were synthesized by elimination reaction from the corresponding alpha -hydroxyferrocenylalkanes using methanesulfonylchloride and triethylamine. (C) 2001 Elsevier science B.V. All rights reserved.
Synthesis and electrochemical properties of mono- and (�)-1,2-dialkylferrocenes and alkylferrocenium hexafluorophosphates in aqueous and micellar media
作者:M. A. Bazhenova、S. S. Bogush、A. G. Herbst、T. V. Demeshchik、Yu. G. Komarovskaya、V. S. Kurova、M. D. Reshetova、A. D. Ryabov、E. S. Ryabova、Yu. N. Frrsova
DOI:10.1007/bf01435401
日期:1996.10
Simple methods have been developed for the preparation of a series of n-alkylferrocenes H(CH2)(n)Fc (n = 3, 5-8, or 12) based on Friedel-Crafts acylation of ferrocenes followed by reduction of the corresponding ketones with Zn amalgam. The properties of H(CH2)(n)Fc and the corresponding ferrocenium ions in micellar aqueous solutions and the behavior of water-soluble cations H(CH2)(n)Fc(+) in the absence of micelles were studied by cyclic voltammetry. In all cases, the formal redox potentials of ferrocenes (E(o)') increase linearly as n increases up to 8. Whether micelles are present or not, the corresponding correlation equation has the following form: E(o)' = alpha + beta n, where beta approximate to 29 mV in all cases. The synthesis of (+/-)-1-ethyl-2-methylferrocene from racemic alpha-dimethylaminoethylferrocene is reported.