Topic
Acetonitrile
About: Acetonitrile is a research topic. Over the lifetime, 11298 publications have been published within this topic receiving 175275 citations. The topic is also known as: cyanomethane & ethyl nitrile.
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TL;DR: Direct catalytic enantioselective cross aldol-type reaction of an acetate surrogate was developed using Cu alkoxide-chiral phosphine complexes as catalysts using either DTBM-SEGPHOS or a tuned BIPHEP as a chiral ligand.
141 citations
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TL;DR: A new fluorescence sensor for determining water content in organic solvents has been successfully demonstrated based on a fluorescent dye based on 4'-N,N-dimethylamino-4 methylacryloylamino chalcone.
141 citations
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139 citations
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TL;DR: In this paper, the complex permittivity spectra of amides formamide, N-methylformamide and N-dimethylformamide, as well as dipolar aprotic solvents acetonitrile, propylene carbonate and dimethylsulfoxide were determined in the frequency range 0.95-89 GHz.
138 citations
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TL;DR: The previously unknown titanium(IV)-containing mu-hydroxo dimeric heteropolytungstate (Bu4N)7[(PTiW11O39)2-OH] (TBA salt of H1) has been synthesized and shows higher catalytic activity than 2 for thioether oxidation by hydrogen peroxide in acetonitrile.
Abstract: The previously unknown titanium(IV)-containing μ-hydroxo dimeric heteropolytungstate (Bu4N)7[(PTiW11O39)2OH] (TBA salt of H1) has been synthesized, starting from H5PTiW11O40, and characterized by elemental analysis, multinuclear (31P, 17O, 183W) NMR, IR, FAB-MS, cyclic voltammetry, and potentiometric titration. 31P NMR reveals that H1 (δ −12.76) readily forms in MeCN from the Keggin monomer (POM), PTiW11O405- (2, δ −13.34), upon the addition of 1.5 equiv of H+, via the protonated species, P(TiOH)W11O394- (H2, δ −13.44). The ratio of H1, 2, and H2, which are present in equilibrium in MeCN solution at 25 °C, depends on the concentration of both H+ and H2O. The Ti−O−Ti linkage readily reacts with nucleophilic reagents, such as H2O and ROH, to yield monomeric Keggin derivatives. μ-Hydroxo dimer H1 shows higher catalytic activity than 2 for thioether oxidation by hydrogen peroxide in acetonitrile. The reaction proceeds readily at room temperature and affords the corresponding sulfoxide and sulfone in ca. quant...
138 citations