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Takeyama T, Tsushima S, Takao K. Effects of Substituents on the Molecular Structure and Redox Behavior of Uranyl(V/VI) Complexes with N 3O 2-Donating Schiff Base Ligands. Inorg Chem 2021; 60:11435-11449. [PMID: 34278786 DOI: 10.1021/acs.inorgchem.1c01449] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Uranyl(VI) complexes with pentadentate N3O2-donating Schiff base ligands having various substituents at the ortho (R1) and/or para (R2) positions on phenolate moieties, R1,R2-Mesaldien2-, were synthesized and thoroughly characterized by 1H nuclear magnetic resonance, infrared, elemental analysis, and single-crystal X-ray diffraction. Molecular structures of UO2(R1,R2-Mesaldien) are more or less affected by the electron-donating or -withdrawing nature of the substituents. The redox behavior of all UO2(R1,R2-Mesaldien) complexes was investigated to understand how substituents introduced onto the ligand affect the redox behavior of these uranyl(VI) complexes. As a result, the redox potentials of UO2(R1,R2-Mesaldien) in dimethyl sulfoxide increased from -1.590 to -1.213 V with an increase in the electron-withdrawing nature of the substituents at the R1 and R2 positions. The spectroelectrochemical measurements and theoretical calculation [density functional theory (DFT) and time-dependent DFT calculations] revealed that the center U6+ of each UO2(R1,R2-Mesaldien) complex undergoes one-electron reduction to afford the corresponding uranyl(V) complex, [UO2(R1,R2-Mesaldien)]-, regardless of the difference in the substituents. Consequently, the redox active center of uranyl(VI) complexes seems not to be governed by the redox potentials but to be determined by whether the LUMO is centered on a U 5f orbital or on one π* orbital of a surrounding ligand.
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Affiliation(s)
- Tomoyuki Takeyama
- Laboratory for Zero-Carbon Energy, Institute of Innovative Research, Tokyo Institute of Technology, 2-12-1 N1-32, O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Satoru Tsushima
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstraße 400, 01328 Dresden, Germany.,Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovative Research, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Koichiro Takao
- Laboratory for Zero-Carbon Energy, Institute of Innovative Research, Tokyo Institute of Technology, 2-12-1 N1-32, O-okayama, Meguro-ku, Tokyo 152-8550, Japan
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2
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Fetrow TV, Grabow JP, Leddy J, Daly SR. Convenient Syntheses of Trivalent Uranium Halide Starting Materials without Uranium Metal. Inorg Chem 2021; 60:7593-7601. [DOI: 10.1021/acs.inorgchem.1c00598] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Taylor V. Fetrow
- Department of Chemistry, The University of Iowa, E331 Chemistry Building, Iowa City, Iowa 52242, United States
| | - J. Peter Grabow
- Department of Chemistry, The University of Iowa, E331 Chemistry Building, Iowa City, Iowa 52242, United States
| | - Johna Leddy
- Department of Chemistry, The University of Iowa, E331 Chemistry Building, Iowa City, Iowa 52242, United States
| | - Scott R. Daly
- Department of Chemistry, The University of Iowa, E331 Chemistry Building, Iowa City, Iowa 52242, United States
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3
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Ward RJ, Del Rosal I, Chirdon DN, Kelley SP, Tarlton ML, Maron L, Walensky JR. Two-Electron Reduction of a U(VI) Complex with Al(C 5Me 5). Inorg Chem 2020; 59:16137-16142. [PMID: 33095563 DOI: 10.1021/acs.inorgchem.0c03036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The reduction of U(VI) to U(IV) is rare, especially in one step, and not observed electrochemically as a one-wave, two-electron couple. Here, we demonstrate that reduction of the uranium(VI) bis(imido) complex, (C5Me5)2U[═N(4-OiPrC6H4)]2, is readily accomplished with Al(C5Me5), forming the bridging uranium(IV)/aluminum(III) imido complex (C5Me5)2U[μ2-N(4-OiPrC6H4)]2Al(C5Me5). The structure and bonding of the bridging imido complex is examined with electrochemical measurements in tandem with density functional theory calculations.
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Affiliation(s)
- Robert J Ward
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Iker Del Rosal
- Universite de Toulouse and CNRS, INSA, UPS, UMR 5215, LPCNO, Toulouse 31077, France
| | - Danielle N Chirdon
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Steven P Kelley
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Michael L Tarlton
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Laurent Maron
- Universite de Toulouse and CNRS, INSA, UPS, UMR 5215, LPCNO, Toulouse 31077, France
| | - Justin R Walensky
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
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4
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Kent GT, Murillo J, Wu G, Fortier S, Hayton TW. Coordination of Uranyl to the Redox-Active Calix[4]pyrrole Ligand. Inorg Chem 2020; 59:8629-8634. [PMID: 32492338 DOI: 10.1021/acs.inorgchem.0c01224] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Reaction of [Li(THF)]4[L] (L = Me8-calix[4]pyrrole]) with 0.5 equiv of [UVIO2Cl2(THF)2]2 results in formation of the oxidized calix[4]pyrrole product, [Li(THF)]2[LΔ] (1), concomitant with formation of reduced uranium oxide byproducts. Complex 1 can also be generated by reaction of [Li(THF)]4[L] with 1 equiv of I2. We hypothesize that formation of 1 proceeds via formation of a highly oxidizing cis-uranyl intermediate, [Li]2[cis-UVIO2(calix[4]pyrrole)]. To test this hypothesis, we explored the reaction of 1 with either 0.5 equiv of [UVIO2Cl2(THF)2]2 or 1 equiv of [UVIO2(OTf)2(THF)3], which affords the isostructural uranyl complexes, [Li(THF)][UVIO2(LΔ)Cl(THF)] (2) and [Li(THF)][UVIO2(LΔ)(OTf)(THF)] (3), respectively. In the solid state, 2 and 3 feature unprecedented uranyl-η5-pyrrole interactions, making them rare examples of uranyl organometallic complexes. In addition, 2 and 3 exhibit some of the smallest O-U-O angles reported to date (2: 162.0(7) and 162.7(7)°; 3: 164.5(5)°). Importantly, the O-U-O bending observed in these complexes suggests that the oxidation of [Li(THF)]4[L] does indeed occur via an unobserved cis-uranyl intermediate.
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Affiliation(s)
- Greggory T Kent
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Jesse Murillo
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Skye Fortier
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Trevor W Hayton
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
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5
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Assefa MK, Wu G, Hayton TW. Uranyl Oxo Silylation Promoted by Silsesquioxane Coordination. J Am Chem Soc 2020; 142:8738-8747. [PMID: 32292028 DOI: 10.1021/jacs.0c00990] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Mikiyas K. Assefa
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Trevor W. Hayton
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
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6
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Maiola ML, Petel BE, Brennessel WW, Matson EM. Site-selective halogenation of mixed-valent vanadium oxide clusters. Dalton Trans 2020; 49:16184-16192. [PMID: 32307494 DOI: 10.1039/d0dt01077d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Here, we expand on the synthesis and characterization of chloride-functionalized polyoxovanadate-alkoxide (POV-alkoxide) clusters, to include the halogenation of mixed-valent vanadium oxide assemblies.
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8
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Cowie BE, Purkis JM, Austin J, Love JB, Arnold PL. Thermal and Photochemical Reduction and Functionalization Chemistry of the Uranyl Dication, [UVIO2]2+. Chem Rev 2019; 119:10595-10637. [DOI: 10.1021/acs.chemrev.9b00048] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Bradley E. Cowie
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, The King’s Buildings, Edinburgh EH9 3FJ, U.K
| | - Jamie M. Purkis
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, The King’s Buildings, Edinburgh EH9 3FJ, U.K
| | - Jonathan Austin
- National Nuclear Laboratory, Chadwick House,
Warrington Road, Birchwood Park, Warrington WA3 6AE, U.K
| | - Jason B. Love
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, The King’s Buildings, Edinburgh EH9 3FJ, U.K
| | - Polly L. Arnold
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, The King’s Buildings, Edinburgh EH9 3FJ, U.K
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9
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Arnold PL, Puig-Urrea L, Wells JAL, Yuan D, Cruickshank FL, Young RD. Applications of boroxide ligands in supporting small molecule activation by U(iii) and U(iv) complexes. Dalton Trans 2019; 48:4894-4905. [PMID: 30924481 DOI: 10.1039/c8dt05051a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The boroxide ligand [OBAr2]- (Ar = Mes, Trip) is shown to be able to support both UIII and UIV centres for the first time. The synthesis and structures of homoleptic and heteroleptic UIII and UIV complexes are reported. The UX3 complex with larger substituents, [U(OBTrip2)3]2, exhibits greater thermal stability compared to less encumbered [U(OBMes2)3]2 but reacts with a smaller range of the small molecules tested to date. Initial studies on their capacity to participate in small molecule chemistry show that dark purple [U(OBMes2)3]2 binds and/or reductively activates a variety of small molecules such as pyridine-oxide, triphenylphosphineoxide, sulfur, and dicyclohexylcarbodiimide. While [U(OBMes2)3]2 shows no reaction with CO or CO2, [U(OBTrip2)3]2 is oxidised by both, in the former case forming [U(OBTrip2)4], and in the latter case forming a small quantity of the structurally characterised μ-carbonate product [(μ-CO3){U(OBTrip2)3}2].
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Affiliation(s)
- Polly L Arnold
- EaStCHEM School of Chemistry, Joseph Black Building, The King's Buildings, The University of Edinburgh, Edinburgh, EH9 3FJ, UK
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10
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Coughlin EJ, Qiao Y, Lapsheva E, Zeller M, Schelter EJ, Bart SC. Uranyl Functionalization Mediated by Redox-Active Ligands: Generation of O-C Bonds via Acylation. J Am Chem Soc 2019; 141:1016-1026. [PMID: 30532952 DOI: 10.1021/jacs.8b11302] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A series of uranyl compounds with the redox-active iminoquinone ligand have been synthesized, and their electronic structures elucidated using multinuclear NMR, EPR, electronic absorption spectroscopies, SQUID magnetometry, and X-ray crystallography. Characterization and analysis of the iminoquinone (iq0) complex, (dippiq)UO2(OTf)2THF (1-iq), the iminosemiquinone (isq1-) complex, (dippisq)2UO2THF (2-isq), and the amidophenolate (ap2-) complex, [(dippap)2UO2THF][K(18-crown-6)(THF)2]2(3-ap crown) show that reduction events are ligand-based, with the uranium center remaining in the hexavalent state. Reactivity of 2-isq with B-chlorocatecholborane or pivaloyl chloride leads to U-Ouranyl bond scission and reduction of U(VI) to U(IV) concomitant with ligand oxidation along with organic byproducts. 18O isotopic labeling experiments along with IR spectroscopy, mass spectrometry, and multinuclear NMR spectroscopy confirm that the organic byproducts contain oxygen atoms which originate from U-Ouranyl bond activation.
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Affiliation(s)
- Ezra J Coughlin
- H.C. Brown Laboratory, Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Yusen Qiao
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104 , United States
| | - Ekaterina Lapsheva
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104 , United States
| | - Matthias Zeller
- H.C. Brown Laboratory, Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Eric J Schelter
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylvania 19104 , United States
| | - Suzanne C Bart
- H.C. Brown Laboratory, Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , United States
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11
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Rahimi N, Herbert DE, Budzelaar PHM. Formation and Rearrangement of Reduced Diiminepyridine Complexes of Zr and Hf. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800918] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Naser Rahimi
- Department of Chemistry University of Manitoba 144 Dysart Road R3T 2N2 Winnipeg MB Canada
| | - David E. Herbert
- Department of Chemistry University of Manitoba 144 Dysart Road R3T 2N2 Winnipeg MB Canada
| | - Peter H. M. Budzelaar
- Department of Chemistry University of Manitoba 144 Dysart Road R3T 2N2 Winnipeg MB Canada
- Dipartimento di Scienze Chimiche Università di Napoli Federico II Via Cintia 4 80126 Napoli Italia
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12
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13
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Edelmann FT. Lanthanides and actinides: Annual survey of their organometallic chemistry covering the year 2016. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.02.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Trusso Sfrazzetto G, Millesi S, Pappalardo A, Tomaselli GA, Ballistreri FP, Toscano RM, Fragalà I, Gulino A. Nerve Gas Simulant Sensing by a Uranyl-Salen Monolayer Covalently Anchored on Quartz Substrates. Chemistry 2016; 23:1576-1583. [DOI: 10.1002/chem.201602292] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Indexed: 12/23/2022]
Affiliation(s)
| | - Salvatrice Millesi
- Dipartimento di Scienze Chimiche; Università di Catania; viale A. Doria 6 95125 Catania Italy
- INSTM Udr of Catania; viale A. Doria 6 95125 Catania Italy
| | - Andrea Pappalardo
- Dipartimento di Scienze Chimiche; Università di Catania; viale A. Doria 6 95125 Catania Italy
- INSTM Udr of Catania; viale A. Doria 6 95125 Catania Italy
| | - Gaetano A. Tomaselli
- Dipartimento di Scienze Chimiche; Università di Catania; viale A. Doria 6 95125 Catania Italy
| | | | - Rosa Maria Toscano
- Dipartimento di Scienze Chimiche; Università di Catania; viale A. Doria 6 95125 Catania Italy
| | - Ignazio Fragalà
- Dipartimento di Scienze Chimiche; Università di Catania; viale A. Doria 6 95125 Catania Italy
- INSTM Udr of Catania; viale A. Doria 6 95125 Catania Italy
| | - Antonino Gulino
- Dipartimento di Scienze Chimiche; Università di Catania; viale A. Doria 6 95125 Catania Italy
- INSTM Udr of Catania; viale A. Doria 6 95125 Catania Italy
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15
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Kiernicki JJ, Zeller M, Bart SC. Facile Reductive Silylation of UO 22+ to Uranium(IV) Chloride. Angew Chem Int Ed Engl 2016; 56:1097-1100. [PMID: 27990733 DOI: 10.1002/anie.201609838] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 11/19/2016] [Indexed: 11/08/2022]
Abstract
General reductive silylation of the UO22+ cation occurs readily in a one-pot, two-step stoichiometric reaction at room temperature to form uranium(IV) siloxides. Addition of two equivalents of an alkylating reagent to UO2 X2 (L)2 (X=Cl, Br, I, OTf; L=triphenylphosphine oxide, 2,2'-bipyridyl) followed by two equivalents of a silyl (pseudo)halide, R3 Si-X (R=aryl, alkyl, H; X=Cl, Br, I, OTf, SPh), cleanly affords (R3 SiO)2 UX2 (L)2 in high yields. Support is included for the key step in the process, reduction of UVI to UV . This procedure is applicable to a wide range of commercially available uranyl salts, silyl halides, and alkylating reagents. Under this protocol, one equivalent of SiCl4 or two equivalents of Me2 SiCl2 results in direct conversion of the uranyl to uranium(IV) tetrachloride. Full spectroscopic and structural characterization of the siloxide products is reported.
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Affiliation(s)
- John J Kiernicki
- H. C. Brown Laboratory, Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA
| | - Matthias Zeller
- H. C. Brown Laboratory, Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA.,Department of Chemistry, Youngstown State University, Youngstown, OH, 44555, USA
| | - Suzanne C Bart
- H. C. Brown Laboratory, Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA
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16
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Kiernicki JJ, Zeller M, Bart SC. Facile Reductive Silylation of UO2
2+
to Uranium(IV) Chloride. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609838] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- John J. Kiernicki
- H. C. Brown Laboratory, Department of Chemistry; Purdue University; West Lafayette IN 47907 USA
| | - Matthias Zeller
- H. C. Brown Laboratory, Department of Chemistry; Purdue University; West Lafayette IN 47907 USA
- Department of Chemistry; Youngstown State University; Youngstown OH 44555 USA
| | - Suzanne C. Bart
- H. C. Brown Laboratory, Department of Chemistry; Purdue University; West Lafayette IN 47907 USA
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17
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Lu E, Cooper OJ, Tuna F, Wooles AJ, Kaltsoyannis N, Liddle ST. Uranium-Carbene-Imido Metalla-Allenes: Ancillary-Ligand-Controlled cis
-/trans
-Isomerisation and Assessment of trans
Influence in the R2
C=UIV
=NR′ Unit (R=Ph2
PNSiMe3
; R′=CPh3
). Chemistry 2016; 22:11559-63. [DOI: 10.1002/chem.201602690] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Erli Lu
- School of Chemistry; The University of Manchester; Oxford Road Manchester M13 9PL UK
| | - Oliver J. Cooper
- School of Chemistry; The University of Manchester; Oxford Road Manchester M13 9PL UK
| | - Floriana Tuna
- School of Chemistry; The University of Manchester; Oxford Road Manchester M13 9PL UK
| | - Ashley J. Wooles
- School of Chemistry; The University of Manchester; Oxford Road Manchester M13 9PL UK
| | - Nikolas Kaltsoyannis
- School of Chemistry; The University of Manchester; Oxford Road Manchester M13 9PL UK
| | - Stephen T. Liddle
- School of Chemistry; The University of Manchester; Oxford Road Manchester M13 9PL UK
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