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 article, the carbonylation of ruthenium trichloride in methanol affords white dimeric [Ru(CO)3Cl2]2 and Ru3( CO)12.
Abstract: Carbonylation of ruthenium trichloride in methanol affords white dimeric [Ru(CO)3Cl2]2and Ru3(CO)12. Crystallisation of the carbonyl chloride from tetrahydrofuran gives the complex C4H8O,Ru(CO)3Cl2, while sublimation yields a yellow isomeri carbonyl chloride. Treatment of the tetrahydrofuran adduct with donor ligands leads to evolution of CO and precipitation of complexes of the type L2Ru(CO)2Cl2. The carbonyl Ru3(CO)12 is obtained in high yield by carbonylating ruthenium trichloride in methanol at CO pressures of up to 10 atm., with zinc as a halogen acceptor.
43 citations
TL;DR: An unsymmetrical diamine monomer 4-(p-aminophenoxy)-3-trifluoromethyl-4'-aminobiphenyl has been synthesized successfully as mentioned in this paper.
Abstract: An unsymmetrical diamine monomer 4-(p-aminophenoxy)-3-trifluoromethyl-4'-aminobiphenyl has been synthesized successfully. This monomer leads to the synthesis of different novel poly(ether imide)s when reacted with different dianhydrides like pyromellatic dianhydride (PMDA), benzophenone tetracarboxylic acid dianhydride (BTDA), 2,2-bis(3,4-dicarboxyphenyl) hexafluoropropane (6FDA), and oxy diphthalic anhydride (ODA). The poly(ether imide) prepared from this monomer on reaction with 6FDA is soluble in several organic solvents such as N-methylpyrolidinone (NMP), dimenthylformamide (DMF), N,N-dimethyl-acetamide (DMAc), tetrahydrofuran (THF), and CHCl 3 . The poly(ether imide)s prepared from BTDA and ODA are soluble in NMP, DMF, and DMAc but not in THF or CHCl 3 , whereas the polymer prepared from PMDA is soluble only in NMP. The water uptake value for these poly(ether imide) films is very low (0.2-0.5%), and exhibited low dielectric constants (2.81 at 1 MHz). The polymers exhibited high thermal stability up to 532°C in air for 5% weight loss, and high glass transition temperatures up to 288°C. The polymer exhibited high tensile strength up to 135 MPa, modulus 3.2 GPa, and elongation at break up to 25%, depending on the exact polymer structure.
43 citations
TL;DR: A single-crystal X-ray diffraction study of tetrakis(tetrahydrofuran)vanadium(II)-bis[hexacarbonylvanadate(I) has been carried out as discussed by the authors.
43 citations
TL;DR: The solvent dependent properties of polyethyleneimine (PEI)-capped Cu nanoclusters are discussed in this article, where the PEI-encapsulated Cu nanclusters were dispersed in 12 polar organic solvents, and in water and alcohols, the nanocluster display similar properties and could be stable in the dark.
Abstract: The solvent-dependent properties of polyethyleneimine (PEI)-capped Cu nanoclusters are discussed in this study. The PEI-encapsulated Cu nanoclusters were dispersed in 12 polar organic solvents, and in water and alcohols, the nanoclusters display similar properties and could be stable in the dark. Moreover, Cu nanoclusters exhibit a blue shift of the emission peak in tetrahydrofuran (THF) and 1,4-dioxane, and the absorption spectra change dramatically. Furthermore, in THF the fluorescence intensity increases significantly over time. Besides, the absorption spectra also display a significant change in acetonitrile, dimethyl sulfoxide, and ethylene glycol monomethyl ether, while the emission bands show no obvious shift. In acetonitrile, THF, and 1,4-dioxane, the solvents look milky under bright light, and the fluorescence colors look more blue under a UV lamp. The solvent effect on the fluorescence and absorption spectra of the PEI-capped Cu nanoclusters in water–THF mixtures at different solvent ratios is d...
43 citations