- EXHCHANGE BETWEEN LABELLED CYANIDE AND THE NITRILE FUNCTION OF ACETONITRILE
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Labelled potassium cyanide, dissolved in acetonitrile with the aid of a crown ether, exchanges with the nitrile function of the solvent resulting in labelled acetonitrile.
- Jay, Michael,Layton, W. John,Digenis, George A.
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- Di- and tetrametallic hafnocene oxamidides prepared from CO-induced N 2 bond cleavage and thermal rearrangement to hafnocene cyanide derivatives
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Carbonylation of the hafnocene dinitrogen complex [(η5- C5H2-1,2,4-Me3)2Hf] 2(μ2,η2:η2-N 2) with 4 atm of carbon monoxide yielded the tetrametall
- Semproni, Scott P.,Margulieux, Grant W.,Chirik, Paul J.
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- Facile CO Cleavage by a Multimetallic CsU2Nitride Complex
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Uranium nitrides are important materials with potential for application as fuels for nuclear power generation, and as highly active catalysts. Molecular nitride compounds could provide important insight into the nature of the uranium–nitride bond, but currently little is known about their reactivity. In this study, we found that a complex containing a nitride bridging two uranium centers and a cesium cation readily cleaved the C≡O bond (one of the strongest bonds in nature) under ambient conditions. The product formed has a [CsU2(μ-CN)(μ-O)] core, thus indicating that the three cations cooperate to cleave CO. Moreover, the addition of MeOTf to the nitride complex led to an exceptional valence disproportionation of the CsUIV–N–UIVcore to yield CsUIII(OTf) and [MeN=UV] fragments. The important role of multimetallic cooperativity in both reactions is illustrated by the computed reaction mechanisms.
- Falcone, Marta,Kefalidis, Christos E.,Scopelliti, Rosario,Maron, Laurent,Mazzanti, Marinella
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- Total synthesis of isotopically labelled flavonoids, 2: 13C-labelled (±)-catechin from potassium [13C]cyanide
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Racemic 4-[13C]catechin 14 has been synthesized in ten steps starting from potassium [13C]cyanide. The intermediate chalcone 9 was formed by acylation of the benzylated phloroglucinol 7 with the caffeic acid synthon 6, using the trif
- Nay, Bastien,Arnaudinaud, Valérie,Peyrat, Jean-Fran?ois,Nuhrich, Alain,Deffieux, Gérard,Mérillon, Jean-Michel,Vercauteren, Joseph
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p. 1279 - 1283
(2007/10/03)
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