Victor Mougel
ETH Zurich
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Featured researches published by Victor Mougel.
Chemical Reviews | 2016
Christophe Copéret; Aleix Comas-Vives; Matthew P. Conley; Deven P. Estes; Alexey Fedorov; Victor Mougel; Haruki Nagae; Francisco Núñez-Zarur; Pavel A. Zhizhko
Site Heterogeneous Catalysts: Strategies, Methods, Structures, and Activities Christophe Copeŕet,*,† Aleix Comas-Vives,† Matthew P. Conley,† Deven P. Estes,† Alexey Fedorov,† Victor Mougel,† Haruki Nagae,†,‡ Francisco Nuñ́ez-Zarur,† and Pavel A. Zhizhko†,§ †Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1−5, CH-8093 Zürich, Switzerland ‡Department of Chemistry, Graduate School of Engineering Science, Osaka University, CREST, Toyonaka, Osaka 560-8531, Japan A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str. 28, 119991 Moscow, Russia
Angewandte Chemie | 2012
Victor Mougel; Clément Camp; Jacques Pécaut; Christophe Copéret; Laurent Maron; Christos E. Kefalidis; Marinella Mazzanti
Siloxides can support U! in the reduction of small molecules with uranium complexes. The treatment of [UN(SiMe3)23] with HOSi(OtBu)3 (3 equiv) yielded a novel homoleptic uranium(III) siloxide complex 1, which acted as a two-electron reducing agent toward CS 2 and CO2 (see scheme). Complex 1 also reduced toluene to afford a diuranium inverted-sandwich complex. Copyright
Angewandte Chemie | 2009
Victor Mougel; Pawel Horeglad; Grégory Nocton; Jacques Pécaut; Marinella Mazzanti
Reference EPFL-ARTICLE-203028doi:10.1002/anie.200903457View record in Web of Science Record created on 2014-11-07, modified on 2017-05-12
Angewandte Chemie | 2014
Victor Mougel; Lucile Chatelain; Johannes Hermle; R. Caciuffo; E. Colineau; Floriana Tuna; Nicola Magnani; Arnaud de Geyer; Jacques Pécaut; Marinella Mazzanti
Single-chain magnets (SCMs) are materials composed of magnetically isolated one-dimensional (1D) units exhibiting slow relaxation of magnetization. The occurrence of SCM behavior requires the fulfillment of stringent conditions for exchange and anisotropy interactions. Herein, we report the synthesis, the structure, and the magnetic characterization of the first actinide-containing SCM. The 5f-3d heterometallic 1D chains [{[UO2(salen)(py)][M(py)4](NO3)}]n, (M=Cd (1) and M=Mn (2); py=pyridine) are assembled trough cation-cation interaction from the reaction of the uranyl(V) complex [UO2(salen)py][Cp*2Co] (Cp*=pentamethylcyclopentadienyl) with Cd(NO3)2 or Mn(NO3)2 in pyridine. The infinite UMn chain displays a high relaxation barrier of 134±0.8 K (93±0.5 cm(-1)), probably as a result of strong intra-chain magnetic interactions combined with the high Ising anisotropy of the uranyl(V) dioxo group. It also exhibits an open magnetic hysteresis loop at T<6 K, with an impressive coercive field of 3.4 T at 2 K.
Angewandte Chemie | 2011
Biplab Biswas; Victor Mougel; Jacques Pécaut; Marinella Mazzanti
Uranium building blocks: Two new uranium cluster topologies are obtained from the stoichiometric hydrolysis of low-valent uranium in non-aqueous media (see picture). The organic base TMEDA directs the self-assembly process towards the formation of a nanosized oxo-hydroxo U16 cluster. Copyright
Chemical Communications | 2010
Victor Mougel; Biplab Biswas; Jacques Pécaut; Marinella Mazzanti
The reaction of benzoic acid with the uranyl(V) complex [(UO(2)Py(5))(KI(2)Py(2))] in pyridine leads to immediate disproportionation with formation of a hexanuclear U(IV) benzoate cluster, a bis-benzoate complex of uranyl(VI) and water.
Journal of the American Chemical Society | 2013
Matthew P. Conley; Victor Mougel; Dmitry V. Peryshkov; William P. Forrest; David Gajan; Anne Lesage; Lyndon Emsley; Christophe Copéret; Richard R. Schrock
Grafting (ArO)2W(═O)(═CHtBu) (ArO = 2,6-mesitylphenoxide) on partially dehydroxylated silica forms mostly [(≡SiO)W(═O)(═CHtBu)(OAr)] along with minor amounts of [(≡SiO)W(═O)(CH2tBu)(OAr)2] (20%), both fully characterized by elemental analysis and IR and NMR spectroscopies. The well-defined oxo alkylidene surface complex [(≡SiO)W(═O)(═CHtBu)OAr] is among the most active heterogeneous metathesis catalysts reported to date in the self-metathesis of cis-4-nonene and ethyl oleate, in sharp contrast to the classical heterogeneous catalysts based on WO3/SiO2.
Journal of the American Chemical Society | 2015
Victor Mougel; Celine B. Santiago; Pavel A. Zhizhko; Elizabeth N. Bess; Jeno Varga; Georg Emil Frater; Matthew S. Sigman; Christophe Copéret
A broad series of fully characterized, well-defined silica-supported W metathesis catalysts with the general formula [(≡SiO)W(═NAr)(═CHCMe2R)(X)] (Ar = 2,6-iPr2C6H3 (AriPr), 2,6-Cl2C6H3 (ArCl), 2-CF3C6H4 (ArCF3), and C6F5 (ArF5); X = OC(CF3)3 (OtBuF9), OCMe(CF3)2 (OtBuF6), OtBu, OSi(OtBu)3, 2,5-dimethylpyrrolyl (Me2Pyr) and R = Me or Ph) was prepared by grafting bis-X substituted complexes [W(NAr)(═CHCMe2R)(X)2] on silica partially dehydroxylated at 700 °C (SiO2-(700)), and their activity was evaluated with the goal to obtain detailed structure-activity relationships. Quantitative influence of the ligand set on the activity (turnover frequency, TOF) in self-metathesis of cis-4-nonene was investigated using multivariate linear regression analysis tools. The TOF of these catalysts (activity) can be well predicted from simple steric and electronic parameters of the parent protonated ligands; it is described by the mutual contribution of the NBO charge of the nitrogen or the IR intensity of the symmetric N-H stretch of the ArNH2, corresponding to the imido ligand, together with the Sterimol B5 and pKa of HX, representing the X ligand. This quantitative and predictive structure-activity relationship analysis of well-defined heterogeneous catalysts shows that high activity is associated with the combination of X and NAr ligands of opposite electronic character and paves the way toward rational development of metathesis catalysts.
Journal of the American Chemical Society | 2010
Clément Camp; Victor Mougel; Paweł Horeglad; Jacques Pécaut; Marinella Mazzanti
The reaction of U(III) with Schiff base ligands and the reduction of U(IV) Schiff base complexes both promote C-C bond formation to afford dinuclear or mononuclear U(IV) amido complexes, which can release up to four electrons to substrates through the oxidative cleavage of the C-C bond.
Angewandte Chemie | 2016
Margherita Pucino; Victor Mougel; Roman Schowner; Alexey Fedorov; Michael R. Buchmeiser; Christophe Copéret
Designing supported alkene metathesis catalysts with high activity and stability is still a challenge, despite significant advances in the last years. Described herein is the combination of strong σ-donating N-heterocyclic carbene ligands with weak σ-donating surface silanolates and cationic tungsten sites leading to highly active and stable alkene metathesis catalysts. These well-defined silica-supported catalysts, [(≡SiO)W(=O)(=CHCMe2 Ph)(IMes)(OTf)] and [(≡SiO)W(=O)(=CHCMe2 Ph)(IMes)(+) ][B(Ar(F) )4 (-) ] [IMes=1,3-bis(2,4,6-trimethylphenyl)-imidazol-2-ylidene, B(Ar(F) )4 =B(3,5-(CF3 )2 C6 H3 )4 ] catalyze alkene metathesis, and the cationic species display unprecedented activity for a broad range of substrates, especially for terminal olefins with turnover numbers above 1.2 million for propene.