Reactions between [(Tren)UN] (1, Tren = {N(CHCHNSiPr)}) and [M(η-CR)] (M/R = Cr/H, Mn/H, Fe/H, Ni/H) were intractable, but M/R = Co/H or Co/Me afforded [(Tren)UN-(η:η-CH)Co(η-CH)] (2) and [(Tren)U-NH] (3), respectively. For M/R = V/H [(Tren)U-NV(η-CH)] (4), was isolated. Complexes 2-4 evidence one-/two-electron uranium reductions, nucleophilic nitrides, and partial N-atom transfer.
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http://dx.doi.org/10.1039/d4cc03846k | DOI Listing |
Chem Commun (Camb)
September 2024
Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
Reactions between [(Tren)UN] (1, Tren = {N(CHCHNSiPr)}) and [M(η-CR)] (M/R = Cr/H, Mn/H, Fe/H, Ni/H) were intractable, but M/R = Co/H or Co/Me afforded [(Tren)UN-(η:η-CH)Co(η-CH)] (2) and [(Tren)U-NH] (3), respectively. For M/R = V/H [(Tren)U-NV(η-CH)] (4), was isolated. Complexes 2-4 evidence one-/two-electron uranium reductions, nucleophilic nitrides, and partial N-atom transfer.
View Article and Find Full Text PDFMolecules
September 2022
Faculty of Engineering, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota 470-0392, Japan.
The reactions of newly designed lithiated triamidoamines Li ( = iPr, Pen, and Cy) with VCl(THF) under N yielded dinitrogen-divanadium complexes with a μ-N between vanadium atoms [{V()}(μ-N)] ( = iPr () and Pen ()) for the former two, while not dinitrogen-divanadium complexes but a mononuclear vanadium complex with a vacant site, [V()] ( = Cy ()), were obtained for the third ligand. The V-N and N-N distances were 1.7655(18) and 1.
View Article and Find Full Text PDFAcc Chem Res
August 2019
Department of Chemistry , University of Vermont, Burlington , Vermont 05405 , United States.
The rationale to pursue long-term study of any system must be sound. Quick discoveries and emergent fields are more than temptations. They remind us to ask what are we gaining through continued study of any system.
View Article and Find Full Text PDFDalton Trans
March 2018
Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany.
The terminal formate complex [(OCHO)Ti(NN)] (3) containing the trianionic triamido-amine ligand (MeSiNCHCH)N (NN) was prepared via salt metathesis of [ClTi(NN)] (1) with sodium formate or alternatively by treatment of the alkyl complex [BuTi(NN)] (2) with ammonium formate [HNEt][OCHO]. Deprotonation of 3 with potassium hexamethyldisilazide gave a polymeric helical chain of the oxo complex {K[OTi(NN)]} (4). Reaction of 2 with the trityl salt [PhC][B(3,5-ClCH)] or the Brønsted acid [HNEt][B(CF)] gave [(EtO)Ti(NN)][BR] (6[BR]·EtO) with R = 3,5-ClCH or CF.
View Article and Find Full Text PDFAcc Chem Res
May 2016
Institute for Materials Chemistry and Engineering, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan.
Nitrogen fixation is an essential chemical process both biologically and industrially. Since the discovery of the first transition-metal-dinitrogen complex in 1965, a great deal of effort has been devoted to the development of artificial nitrogen fixation systems that work under mild reaction conditions. However, the transformation of chemically inert dinitrogen using homogeneous catalysts is still challenging because of the difficulty in breaking the strong triple bond of dinitrogen, and a very limited number of transition metal complexes have exhibited the catalytic activity for the direct transformation of dinitrogen into ammonia with low turnover numbers.
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