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: In this article, a conductance study concerning the interaction between hydronium ion and several crown ethers in acetonitrile, nitrobenzene and 1,2-dichloroethane solutions has been carried out at 25°C.
Abstract: A conductance study concerning the interaction between hydronium ion and several crown ethers in acetonitrile, nitrobenzene and 1,2-dichloroethane solutions has been carried out at 25°C. The stability constants of the resulting 1:1 complexes in acetonitrile and nitrobenzene solutions were determined from the molar conductance-mole ratio data and found to vary in the order 18C6>DB30C10>DC18C6>DB18C6>DB21C7>DB24C8>B15C5. In 1,2-dichloroethane solution, the complexation process results in the dissociation of ion pairs. There is an inverse relationship between the stabilities of the complexes and the Gutmann donicity of the solvents. In nitrobenzene solution, some evidence for the formation of a 2:1 sandwich adduct between the smaller crowns (i.e., B15C5 and 18-crowns) are observed from the molar conductance-mole ratio data which is supported by the1H NMR data.
44 citations
TL;DR: Mid-infrared spectroscopy was used to follow the enzyme kinetics involved in nitrile biocatalysis using whole cell suspensions of the bacterium Rhodococcus rhodochrous LL100-21 and has shown that this novel technique has potentially useful applications in bioc atalysis.
44 citations
TL;DR: In this paper, the reaction of copper(I) chloride with thiophene-2-carbaldehyde thiosemicarbazone (Httsc) in acetonitrile in the presence of Ph3P yielded a sulfur-bridged dimer.
44 citations
TL;DR: The complexes (Bu4N)(LMeM(II)-OH) and LMeCu(III)(CH2CN), novel cyanomethide complexes that were fully characterized, including by X-ray crystallography, contrast with the usual reactions of metal-hydroxide complexes with nitriles, which typically involve attack at the nitrile carbon and formation of amides or carboxylic acids.
Abstract: The complexes (Bu4N)(LMeMII–OH) (LMe = 2,6-dimethylphenyl-substituted pyridine(dicarboxamide); M = Cu or Ni) react with CH3CN to yield (Bu4N)(LMeM–CH2CN) cyanomethide complexes, which were fully characterized, including by X-ray crystallography. These conversions contrast with the usual reactions of metal hydroxide complexes with nitriles, which typically involve attack at the nitrile carbon atom and formation of amides or carboxylic acids. Kinetic studies (M = Cu) revealed a first-order dependence on the complex and a kinetic isotope effect [k(CH3CN)/k(CD3CN)] of 4. Various mechanisms involving either intra- or intermolecular deprotonation steps are proposed. In addition, (Bu4N)(LMeCu–OH) was oxidized by ferrocenium hexafluorophospate (FcPF6) to a proposed CuIII complex LMeCuOH at low temperature, and comparisons of its stability and reactivity with dihydroanthracene were drawn to its previously described congener with isopropyl substituents on the phenyl rings of the supporting ligand. The cyanomethide complex (Bu4N)(LMeCu(CH2CN)) was also reversibly oxidized both electrochemically (E1/2 = –0.345 V vs. Fc/Fc+) and chemically (FcPF6, –25 °C). The product was formulated as LMeCuIII(CH2CN), a new CuIII–alkyl complex relevant to such species proposed during copper-catalyzed organic reactions.
44 citations
TL;DR: In this article, the functional dependence of various spectroscopic and photophysical parameters on the polar co-solvent concentration in binary solvent mixtures was studied. But the results for aniline, N,N -dimethylaniline (DMA) and some further alkyl-substituted and rigid anilines derivatives in various solvents were not analyzed.
44 citations