Topic
Tetrahydrofuran
About: Tetrahydrofuran is a research topic. Over the lifetime, 11778 publications have been published within this topic receiving 158241 citations. The topic is also known as: diethylene oxide & 1,4-epoxybutane.
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Patent•
22 Sep 1982
TL;DR: In this paper, the stripping compositions for removing resist materials from substrates comprise compositions of a 2-pyrrolidinone compound and tetrahydrofuran compound and either polyethylene glycol and a diethylene glycol monoalkyl ether may be added to provide even more effective stripping compositions.
Abstract: Stripping compositions for removing resist materials from substrates comprise compositions of a 2-pyrrolidinone compound and tetrahydrofuran compound. Either or both of polyethylene glycol and a diethylene glycol monoalkyl ether may be added to provide even more effective stripping compositions.
80 citations
TL;DR: In this paper, the authors used polyvinylpyrrolidone (PVP) and chitosan (CS) membranes for de- dehydrating tetrahydrofuran (THF) from its aqueous mixtures.
80 citations
TL;DR: It is shown by chromium K-edge and sulfur K- edge X-ray absorption spectroscopy (XAS) that the oxidation state of the central Cr ion in each compound is the same (+III, d(3)) and that all one-electron redox processes are ligand-based, involving one, two, or three ligand pi radical monoanions.
Abstract: From the reaction mixture of 3,6-dichlorobenzene-1,2-dithiol, H2(Cl2-bdt), [CrCl3(thf)3], and NEt3 in tetrahydrofuran (thf) in the presence of air, dark green crystals of [N(n-Bu)4]2[Cr(Cl2-bdt)3] ...
80 citations
TL;DR: In this article, the reduction of WCl6 or [WCl4(PR2Ph)2](R = Et or Prn) with Mg in the presence of PR2Ph under N2 in tetrahydrofuran (thf) gives a mixture of dinitrogen complexes: [{W(N2)2(PR 2Ph)3}2(µ-N2)](1), trans-[W( N2) 2(PR-2Ph4]4]-(2), and [W(η6
Abstract: Reduction of WCl6 or [WCl4(PR2Ph)2](R = Et or Prn) with Mg in the presence of PR2Ph under N2 in tetrahydrofuran (thf) gives a mixture of dinitrogen complexes: [{W(N2)2(PR2Ph)3}2(µ-N2)](1), trans-[W(N2)2(PR2Ph)4](2), and [W(η6-C6H5PR2)(N2)(PR2Ph)2](3) which can be observed in the 15N n.m.r. spectra of the reaction solutions and isolated in most cases in moderate yield. Compound (1a)(R = Et) is shown to be a dimer by X-ray analysis but the structure could be refined only with constraints on interatomic distances. Compounds (1) react with anhydrous HCl (thf, 20 °C) to give hydrazine (0.2 mol/W atom) and dinitrogen (2 mol/W atom). Compound (2a)(R = Et) crystallises as a thf solvate with W–N = 1.986(6) and 1.994(6), N–N = 1.146(7) and 1.139(7)A. Complex (2a) gives ammonia (1.8 mol/W atom) and N2(1 mol/W atom) on treatment with H2SO4–MeOH. Compound (3b)(R = Prn) has W–N = 1.980(8) and N–N = 1.126(10)A and loses N2 quantitatively on treatment with anhydrous HCl in thf.
80 citations
TL;DR: Azo compounds, both symmetric and unsymmetric, are cleaved to amine(s) by using commercial zinc dust and ammonium formate or formic acid in methanol, tetrahydrofuran or dioxane at room temperature.
80 citations