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 paper, the structure around lithium ions in solutions of lithium bromide in acetonitrile and water has been studied by neutron diffraction, and the isotopic first-order difference method has been applied to the lithium ion.
Abstract: The structure around lithium ions in solutions of lithium bromide in acetonitrile and water has been studied by neutron diffraction. For this purpose the isotopic first-order difference method has been applied to the lithium ion. For a 0.58 M acetonitrile solution it has been found that the bromide anion enters into the first solvation shell around the lithium ion, whereas in the case of a 1.88 M aqueous solution the first hydration shell of the cation is not disturbed by the anion. The solvation number is approximately 3 in the case of acetonitrile and approximately 4.5 in the case of water.
53 citations
TL;DR: Triply deprotonated acetonitrile (CCN(3-)) is found in a Au4Ag environment with the terminal carbon bridging four Au(I) centers and the nitrogen donor linking a Ag(I), which is the first example of a μ5-CCN (3-) coordination mode.
Abstract: Unprecedented geminal tetraauration of acetonitrile has been realized through C–H activation by Au(I)–Ag(I) clusters under mild conditions. The reaction of [OAu3Ag(dppy)3](BF4)2 (dppy = diphenylphosphino-2-pyridine) (1), AgBF4, and acetonitrile in the presence of methanol at room temperature resulted in the isolation of the novel cluster [(CCN)2Au8Ag4(dppy)8(CH3CN)2](BF4)6 (2). The centrosymmetric structure consists of two Au4Ag2 motifs stabilized by hemilabile phosphines. Triply deprotonated acetonitrile (CCN3–) is found in a Au4Ag environment with the terminal carbon bridging four Au(I) centers and the nitrogen donor linking a Ag(I) ion, which is the first example of a μ5-CCN3– coordination mode. A concerted metalation/deprotonation process for the C–H activation of acetonitrile that indicates the importance of the oxo ion of the oxonium Au(I) cluster is proposed. Cluster 2 emits bright green light in the solid state at room temperature upon UV irradiation.
53 citations
TL;DR: In this paper, the preferential solvation of the Na+ ion was studied by determining the 23Na chemical shifts for sodium tetraphenylborate solutions in all possible binary solvent mixtures of nitromethane, acetonitrile, hexamethylphosphoramide, dimethylsulfoxide, pyridine and tetramethylurea.
53 citations
TL;DR: In this article, it was shown that the type of the separation buffer and the conditions for the stacking of cationic versus anionic compounds are quite different and that the ionic strength of the buffer and addition of organic modifiers affected the stacking to a limited extent.
53 citations