Iron Trifluoroacetate Research Articles

Water compatible silica supported iron trifluoroacetate and trichloroacetate: as prominent and recyclable Lewis acid catalysts for solvent-free green synthesis of hexahydroquinoline-3-carboxamides.

Silica supported iron trifluoroacetate and iron trichloroacetate green Lewis acid catalysts were developed by a novel, cheap, environment-friendly approach and utilized in the synthesis of hexahydroquinoline-3-carboxamide derivatives. The structure and morphology of the prepared Lewis acid catalysts were studied by FTIR, PXRD, FE-SEM, HR-TEM, EDX, BET, TGA and NH3-TPD techniques. The present catalysts shows maximum conversion efficiency in hexahydroquinoline-3-carboxamide derivatives synthesis at 70 °C in solvent free reaction condition with best product yield in a short reaction time. Both catalysts are reusable and simple to recover, and perform meritoriously in water as well as in a variety of organic solvents. The key advantages of the current synthetic route are permitting of a variety of functional groups, quick reaction time, high product yield, mild reaction condition, recyclability of catalyst and solvent-free green synthesis. This makes it more convenient, economic and environmentally beneficial.

Synthesis and combustion inhibition efficiency of iron short-chain perfluorocarboxylates

This study reports an experimental exploration of the combustion inhibition efficiency of iron short-chain perfluorocarboxylates, namely, iron trifluoroacetate (FeTFA) and iron pentafluoropropionate (FePFP). The aim is to develop a new phosphor-free fire-extinguishing agent. The synthesized FeTFA and FePFP were characterized by ultraviolet–visible spectroscopy, Fourier-transform infrared spectroscopy, X-ray fluorescence measurements, and fast-atom bombardment mass spectrometry. The FeTFA and FePFP ligands (i) coordinate with the iron ions in bridging form via carboxylate oxygens, (ii) contain no Cl−, and (iii) are hexanuclear complexes with chemical formulas of C18F27O22Fe6 and C27F45O22Fe6, respectively. Suppression trials and thermogravimetric measurements revealed that (i) both FeTFA and FePFP have higher combustion inhibition ability at lower suppressant concentrations than ammonium dihydrogen phosphate (an active component in conventional fire-extinguishing agents), (ii) FePFP is remarkably more inhibition-efficient than FeTFA, and (iii) neither FeTFA nor FePFP hinder cellulose pyrolysis and char combustion in the condensed phase. Thermogravimetry–mass spectrometry measurements confirmed that (i) the main gas-phase decomposition product of FeTFA and FePFP is CF3, and (ii) FePFP is a better CF3 generator than FeTFA. The different inhibition abilities of the two complexes were attributed to their different CF3 generation abilities and eases of decomposing the complex.

Polymerization of epoxides catalyzed by a mixed-valent iron trifluoroacetate [Fe3O(O2CCF3)6(H2O)3

The readily available mixed-valent iron trifluoroacetate complex [Fe2IIIFeII(µ3-O)(O2CCF3)6(H2O)3] is an effective catalyst for the polymerization of epoxides. A very small amount of the catalyst (1.0–0.01 mol%) could initiate the polymerization of cyclohexene oxide, cyclopentene oxide and epichlorohydrin. Based on quantitative end-group analysis by 19F NMR spectroscopy, a Lewis acid (LA⊕) catalyzed anionic reaction mechanism is proposed. Copyright © 2012 Society of Chemical Industry

Efficient rearrangement of epoxides catalyzed by a mixed-valent iron trifluoroacetate [Fe3O(O2CCF3)6(H2O)3

The mixed-valent oxo-centered triiron(III, III, II) trifluoroacetate complex [Fe2IIIFeIIO(O2CCF3)6(H2O)3] was prepared by reacting anhydrous iron(III) chloride with boiling trifluoroacetic acid under nitrogen. The non-hygroscopic and readily available mixed-valent triiron trifluoroacetate complex was found to be an efficient catalyst for the regioselective rearrangement of epoxides. A number of carbonyl compounds formed via the rearrangement of epoxides could be obtained by a simple filtration of the reaction mixture through a short plug of silica gel.

Oxygenation of Hydrocarbons Mediated by Mixed-Valent Basic Iron Trifluoroacetate and Valence-Separated Component Species under Gif-Type Conditions Involves Carbon- and Oxygen-Centered Radicals

Wasserstoffatom-Abstraktion durch Hydroxylradikale führt bei Gif-artigen Oxygenierungen von Adamantan mit H2O2 in Pyridin/Trifluoressigsäure zu tert- und sec-Adamantylradikalen, wenn die Reaktion durch [Fe(O2CCF3)2(py)4] oder [Fe2O(O2CCF3)4(py)6] vermittelt wird; diese Komplexe entstehen in Pyridin aus [Fe3O(O2CCF3)6(L)3] (L=H2O, DMSO; siehe Schema).

Oxygenation of Hydrocarbons Mediated by Mixed-Valent Basic Iron Trifluoroacetate and Valence-Separated Component Species under Gif-Type Conditions Involves Carbon- and Oxygen-Centered Radicals This work was supported by the U.S. Environmental Protection Agency and the NIH/NIEHS (superfund).

Hydrogen-atom abstraction by hydroxyl radicals takes place to generate both tert- and sec-adamantyl radicals in Gif-type oxygenation of adamantane by H2O2 in pyridine/trifluoroacetic acid when the reaction is mediated by [Fe(O2CCF3)2(py)4] or [Fe2O(O2CCF3)4(py)6], which are formed by dissociation of [Fe3O(O2CCF3)6(L)3] in pyridine (L=H2O, DMSO; see scheme). Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2000/z14721_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.

Use of Monocarboxylic Iron Derivatives in the Ring-Opening Polymerization of l-Lactide

l-Lactide was ring-opening polymerized in the melt by using different organic monocarboxylic iron complexes. The complexes were those of iron and acetic acid, butyric acid, isobutyric acid, dichloroacetic acid, and trifluoroacetic acid. The polymerization temperature was in the range 170−210 °C, polymerization time between 0.5 and 25 h, and amount of catalyst added varied between 0.12 and 1.20 wt %. Iron butyrate and iron dichloroacetate complexes were low efficient catalysts in the ring-opening polymerization due to hydrolysis during the preparation. Iron acetate, iron trifluoroacetate, and iron isobutyrate complexes were efficient catalysts yielding a high molar mass poly(l-lactide) with a high monomer conversion. Under optimum conditions a poly(l-lactide) with a molar mass (Mw) of ca. 150 000 g/mol could be prepared. Monomer conversions over 85% were obtained in many experiments. High polymerization temperatures are required though with these kinds of iron catalysts, and some racemization of the polymerization products is evident. The polymerization experiments indicate that the oxidation state of the iron has an influence on the efficiency of the catalysts and that the iron is chemically bound to the polymer.

.pi. Complexes of nitrogen heterocycles. Molecular structure of tricarbonyl(.eta.4-1(1H),2(2H)-diazepinium)iron trifluoroacetate, a fluxional molecule from the protonation of tricarbonyl(.eta.4-1(1H),2-diazepine)iron

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT.pi. Complexes of nitrogen heterocycles. Molecular structure of tricarbonyl(.eta.4-1(1H),2(2H)-diazepinium)iron trifluoroacetate, a fluxional molecule from the protonation of tricarbonyl(.eta.4-1(1H),2-diazepine)ironArthur J. Carty, Nicholas J. Taylor, and Chester R. JablonskiCite this: Inorg. Chem. 1976, 15, 5, 1169–1174Publication Date (Print):May 1, 1976Publication History Published online1 May 2002Published inissue 1 May 1976https://doi.org/10.1021/ic50159a036RIGHTS & PERMISSIONSArticle Views34Altmetric-Citations10LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (777 KB) Get e-AlertsSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts