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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TL;DR: In this paper, a variety of Mg(AX 4n R n R n ) 2 complexes, where A = Al, B, Sb, P, As, Fe, and Ta; X = Cl, Br, and F; and R = butyl, ethyl, phenyl, and benzyl (Bu, Et, Ph, and Bz, respectively) in several solvents, including tetrahydrofuran (THF), 2Me-THF, 1-3 dioxolane, diethyl ether, and poly
Abstract: Magnesium can be reversibly deposited from ethereal solutions of Grignard salts of the RMgX type (R = alkyl, aryl groups, and X = halides: Cl, Br), and complexes of the Mg(AX 4-n R n' R' n ) 2 type (A = Al, B; X = Cl, Br; R, R' = alkyl or aryl groups, and n' + n = n). These complexes can he considered as interaction products between R 2 Mg bases and AX 3-n R n Lewis acids. The use of such complexes in ether solvents enables us to obtain solutions of reasonable ionic conductivity and high anodic stability, which can be suitable for rechargeable Mg battery systems. In this paper we report on the study of variety of Mg(AX 4-n R n ) 2 complexes, where A = Al, B, Sb, P, As, Fe, and Ta; X = Cl, Br, and F; and R = butyl, ethyl, phenyl, and benzyl (Bu, Et, Ph, and Bz, respectively) in several solvents, including tetrahydrofuran (THF), 2Me-THF, 1-3 dioxolane, diethyl ether, and polyethers from the glyme family, including dimethoxyethane (glyme), (CH 3 OCH 2 CH 2 ) 2 O(diglyme), and CH 3 (OCH 2 CH 2 ) 4 OCH 3 (tet-raglyme), as electrolyte solutions for rechargeable magnesium batteries. It was found that Mg(AlCl 4-n R n' R' n ) 2 complexes (R, R' = Et, Bu and n' + n = n) in THF or glymes constitute the best results in terms of the width of the electrochemical window (>2 V), from which magnesium can he deposited reversibly. These solutions were found to be suitable for use in rechargeable magnesium batteries. A variety of electrochemical and spectroscopic studies showed that these solutions have a complicated structure, which is discussed in this paper. It is also clear from this work that Mg deposition-dissolution processes in these solutions are far from being simple reactions of Mg/Mg +2 redox couple. The conditions for optimized Mg deposition-dissolution processes are discussed herein.
233 citations
TL;DR: A direct nucleophilic trifluoromethylation protocol using close to stoichiometric amounts of CF3H in common organic solvents such as tetrahydrofuran (THF), diethyl ether, and toluene is reported on.
Abstract: Fluoroform (CF(3)H), a large-volume by-product of the manufacture of Teflon, refrigerants, polyvinylidene fluoride (PVDF), fire-extinguishing agents, and foams, is a potent and stable greenhouse gas that has found little practical use despite the growing importance of trifluoromethyl (CF3) functionality in more structurally elaborate pharmaceuticals, agrochemicals, and materials. Direct nucleophilic trifluoromethylation using CF(3)H has been a challenge. Here, we report on a direct trifluoromethylation protocol using close to stoichiometric amounts of CF(3)H in common organic solvents such as tetrahydrofuran (THF), diethyl ether, and toluene. The methodology is widely applicable to a variety of silicon, boron, and sulfur-based electrophiles, as well as carbon-based electrophiles.
230 citations
229 citations
TL;DR: In general, nanoparticle production was satisfactory when the initial organic solution of polymer was in the dilute rather than the semi-dilute regime, and acetone, which acted as a theta solvent for PLA, always led to smaller particles and better yields than THF.
225 citations
TL;DR: In this paper, the influence of the surface coverage of the bonded phase on polar group selectivity in reversed-phase liquid chromatography has been explored, using a series of synthesized n -octy bonded phases.
224 citations