1
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Russell JB, Jafari MG, Kim JH, Pudasaini B, Ozarowski A, Telser J, Baik MH, Mindiola DJ. Ynamide and Azaalleneyl. Acid-Base Promoted Chelotropic and Spin-State Rearrangements in a Versatile Heterocumulene [(Ad)NCC( tBu)] . Angew Chem Int Ed Engl 2024; 63:e202401433. [PMID: 38433099 DOI: 10.1002/anie.202401433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 02/22/2024] [Accepted: 02/23/2024] [Indexed: 03/05/2024]
Abstract
We introduce the heterocumulene ligand [(Ad)NCC(tBu)]- (Ad=1-adamantyl (C10H15), tBu=tert-butyl, (C4H9)), which can adopt two forms, the azaalleneyl and ynamide. This ligand platform can undergo a reversible chelotropic shift using Brønsted acid-base chemistry, which promotes an unprecedented spin-state change of the [VIII] ion. These unique scaffolds are prepared via addition of 1-adamantyl isonitrile (C≡NAd) across the alkylidyne in complexes [(BDI)V≡CtBu(OTf)] (A) (BDI-=ArNC(CH3)CHC(CH3)NAr), Ar=2,6-iPr2C6H3) and [(dBDI)V≡CtBu(OEt2)] (B) (dBDI2-=ArNC(CH3)CHC(CH2)NAr). Complex A reacts with C≡NAd, to generate the high-spin [VIII] complex with a κ1-N-ynamide ligand, [(BDI)V{κ1-N-(Ad)NCC(tBu)}(OTf)] (1). Conversely, B reacts with C≡NAd to generate a low-spin [VIII] diamagnetic complex having a chelated κ2-C,N-azaalleneyl ligand, [(dBDI)V{κ2-N,C-(Ad)NCC(tBu)}] (2). Theoretical studies have been applied to better understand the mechanism of formation of 2 and the electronic reconfiguration upon structural rearrangement by the alteration of ligand denticity between 1 and 2.
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Affiliation(s)
- John B Russell
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania, 19104, United States
| | - Mehrafshan G Jafari
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania, 19104, United States
| | - Jun-Hyeong Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) & Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
| | - Bimal Pudasaini
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) & Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida, 32310, United States
| | - Joshua Telser
- Department of Biological, Physical and Health Sciences, Roosevelt University, Chicago, Illinois, 60605, United States
| | - Mu-Hyun Baik
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) & Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
| | - Daniel J Mindiola
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania, 19104, United States
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2
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G Jafari M, Fehn D, Reinholdt A, Hernández-Prieto C, Patel P, Gau MR, Carroll PJ, Krzystek J, Liu C, Ozarowski A, Telser J, Delferro M, Meyer K, Mindiola DJ. Tale of Three Molecular Nitrides: Mononuclear Vanadium (V) and (IV) Nitrides As Well As a Mixed-Valence Trivanadium Nitride Having a V 3N 4 Double-Diamond Core. J Am Chem Soc 2022; 144:10201-10219. [PMID: 35652694 DOI: 10.1021/jacs.2c00276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Transmetallation of [VCl3(THF)3] and [TlTptBu,Me] afforded [(TptBu,Me)VCl2] (1, TptBu,Me = hydro-tris(3-tert-butyl-5-methylpyrazol-1-yl)borate), which was reduced with KC8 to form a C3v symmetric VII complex, [(TptBu,Me)VCl] (2). Complex 1 has a high-spin (S = 1) ground state and displays rhombic high-frequency and -field electron paramagnetic resonance (HFEPR) spectra, while complex 2 has an S = 3/2 4A2 ground state observable by conventional EPR spectroscopy. Complex 1 reacts with NaN3 to form the VV nitride-azide complex [(TptBu,Me)V≡N(N3)] (3). A likely VIII azide intermediate en route to 3, [(TptBu,Me)VCl(N3)] (4), was isolated by reacting 1 with N3SiMe3. Complex 4 is thermally stable but reacts with NaN3 to form 3, implying a bis-azide intermediate, [(TptBu,Me)V(N3)2] (A), leading to 3. Reduction of 3 with KC8 furnishes a trinuclear and mixed-valent nitride, [{(TptBu,Me)V}2(μ4-VN4)] (5), conforming to a Robin-Day class I description. Complex 5 features a central vanadium ion supported only by bridging nitride ligands. Contrary to 1, complex 2 reacts with NaN3 to produce an azide-bridged dimer, [{(TptBu,Me)V}2(1,3-μ2-N3)2] (6), with two antiferromagnetically coupled high-spin VII ions. Complex 5 could be independently produced along with [(κ2-TptBu,Me)2V] upon photolysis of 6 in arene solvents. The putative {VIV≡N} intermediate, [(TptBu,Me)V≡N] (B), was intercepted by photolyzing 6 in a coordinating solvent, such as tetrahydrofuran (THF), yielding [(TptBu,Me)V≡N(THF)] (B-THF). In arene solvents, B-THF expels THF to afford 5 and [(κ2-TptBu,Me)2V]. A more stable adduct (B-OPPh3) was prepared by reacting B-THF with OPPh3. These adducts of B are the first neutral and mononuclear VIV nitride complexes to be isolated.
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Affiliation(s)
- Mehrafshan G Jafari
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Dominik Fehn
- Inorganic Chemistry, Department of Chemistry and Pharmacy, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91058 Erlangen, Germany
| | - Anders Reinholdt
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Cristina Hernández-Prieto
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Prajay Patel
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Michael R Gau
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J Carroll
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - J Krzystek
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
| | - Cong Liu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
| | - Joshua Telser
- Department of Biological, Physical and Health Sciences, Roosevelt University, Chicago, Illinois 60605, United States
| | - Massimiliano Delferro
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Karsten Meyer
- Inorganic Chemistry, Department of Chemistry and Pharmacy, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91058 Erlangen, Germany
| | - Daniel J Mindiola
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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3
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Kaur U, Saha K, Bairagi S, Das A, Roisnel T, Paine TK, Ghosh S. Structural and electronic analysis of bimetallic thiolate complexes of group-5 transition metal ions. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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4
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Vassilyeva OY, Buvaylo EA, Kokozay VN, Skelton BW, Sobolev AN, Bieńko A, Ozarowski A. Ferro- vs. antiferromagnetic exchange between two Ni(II) ions in a series of Schiff base heterometallic complexes: what makes the difference? Dalton Trans 2021; 50:2841-2853. [PMID: 33533773 DOI: 10.1039/d0dt03957h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Three new NiII/ZnII heterometallics, [NiZnL'2(OMe)Cl]2 (1), [NiZnL''(Dea)Cl]2·2DMF (2) and [Ni2(H3L''')2(o-Van)(MeOH)2]Cl·[ZnCl2(H4L''')(MeOH)]·2MeOH (3), containing three-dentate Schiff bases as well as methanol or diethanolamine (H2Dea) or o-vanillin (o-VanH), all deprotonated, as bridging ligands were synthesized and structurally characterized. The Schiff base ligands were produced in situ from o-VanH and CH3NH2 (HL'), or NH2OH (HL"), or 2-amino-2-hydroxymethyl-propane-1,3-diol (H4L'''); a zerovalent metal (Ni and Zn in 1, Zn only in 2 and 3) was employed as a source of metal ions. The first two complexes are dimers with a Ni2Zn2O6 central core, while the third compound is a novel heterometallic cocrystal salt solvate built of a neutral zwitterionic ZnII Schiff base complex and of ionic salt containing dinuclear NiII complex cations. The crystal structures contain either centrosymmetric (1 and 2) or non-symmetric di-nickel fragment (3) with NiNi distances in the range 3.146-3.33 Å. The exchange coupling is antiferromagnetic for 1, J = 7.7 cm-1, and ferromagnetic for 2, J = -6.5 cm-1 (using the exchange Hamiltonian in a form Ĥ = Jŝ1ŝ2). The exchange interactions in 1 and 2 are comparable to the zero-field splitting (ZFS). High-field EPR revealed moderate magnetic anisotropy of opposite signs: D = 2.27 cm-1, E = 0.243 cm-1 (1) and D = -4.491 cm-1, E = -0.684 cm-1 (2). Compound 3 stands alone with very weak ferromagnetism (J = -0.6 cm-1) and much stronger magnetic anisotropy with D = -11.398 cm-1 and E = -1.151 cm-1. Attempts to calculate theoretically the exchange coupling (using the DFT "broken symmetry" method) and ZFS parameters (with the ab initio CASSCF method) were successful in predicting the trends of J and D among the three complexes, while the quantitative results were less good for 1 and 3.
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Affiliation(s)
- Olga Yu Vassilyeva
- Department of Chemistry, Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska str., Kyiv 01601, Ukraine.
| | - Elena A Buvaylo
- Department of Chemistry, Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska str., Kyiv 01601, Ukraine.
| | - Vladimir N Kokozay
- Department of Chemistry, Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska str., Kyiv 01601, Ukraine.
| | - Brian W Skelton
- School of Molecular Sciences, M310, University of Western Australia, Perth, WA 6009, Australia
| | - Alexandre N Sobolev
- School of Molecular Sciences, M310, University of Western Australia, Perth, WA 6009, Australia
| | - Alina Bieńko
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, Wroclaw 50-383, Poland
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, USA
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5
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Premužić D, Hołyńska M, Ozarowski A, Pietzonka C, Roseborough A, Stoian SA. Model Dimeric Manganese(IV) Complexes Featuring Terminal Tris-hydroxotetraazaadamantane and Various Bridging Ligands. Inorg Chem 2020; 59:10768-10784. [PMID: 32687708 DOI: 10.1021/acs.inorgchem.0c01242] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A series of model dinuclear manganese(IV) complexes of the general formula [(H3COH)(L')MnIV(μ-L)2MnIV(L')(HOCH3)] is presented. These compounds feature capping 4,6,10-trihydroxo-3,5,7-trimethyl-1,4,6,10-tetraazaadamantane ligands derived from a polydentate oxime compound (L'). The bridging ligands L include azide (1), methoxide (2), and oxalate (3) anions. The magnetic properties and high-field (HF) EPR spectra of 1-3 were studied in detail and revealed varying weak antiferromagnetic coupling and modest zero-field splitting (ZFS) of the local quartet spin sites. Our HF EPR studies provide insight into the dimer ZFS, including determination of the corresponding parameters by giant spin approach for methoxido-bridged complex 2. Furthermore, the physicochemical properties of 1-3 were studied using IR, UV-vis, and electrochemical (cyclic voltammetry) methods. Theoretical exchange coupling constants were obtained using broken-symmetry (BS) density functional theory (DFT). Computational estimates of the local quartet ground spins state ZFSs of 1-3 were obtained using coupled-perturbed (CP) DFT and complete active space self-consistent field (CASSCF) calculations with n-electron valence state perturbation theory (NEVPT2) corrections. We found that the CP DFT calculations which used the B3LYP functional and models derived experimental structures performed best in reproducing both the magnitude and the sign of the experimental D values. Moreover, our computational investigation of 1-3 suggests that we observe metals sites which have an increased +3 character and are supported by redox noninnocent 4,6,10-trihydroxo-3,5,7-trimethyl-1,4,6,10-tetraazaadamantane ligands. The latter conclusion is further corroborated by the observation that the free ligand can be readily oxidized to yield a NO-based radical.
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Affiliation(s)
- Dejan Premužić
- Fachbereich Chemie and Wissenschaftliches Zentrum für Materialwissenschaften(WZMW), Philipps-Universität Marburg Hans-Meerwein-Straße, Marburg D-35043, Germany
| | - Małgorzata Hołyńska
- Fachbereich Chemie and Wissenschaftliches Zentrum für Materialwissenschaften(WZMW), Philipps-Universität Marburg Hans-Meerwein-Straße, Marburg D-35043, Germany
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
| | - Clemens Pietzonka
- Fachbereich Chemie and Wissenschaftliches Zentrum für Materialwissenschaften(WZMW), Philipps-Universität Marburg Hans-Meerwein-Straße, Marburg D-35043, Germany
| | - Alexander Roseborough
- Department of Chemistry, University of Idaho, 875 Perimeter Drive, Moscow, Idaho 83844, United States
| | - Sebastian A Stoian
- Department of Chemistry, University of Idaho, 875 Perimeter Drive, Moscow, Idaho 83844, United States
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6
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Lugosan A, Cundari T, Fleming K, Dickie DA, Zeller M, Ghannam J, Lee WT. Synthesis, characterization, DFT calculations, and reactivity study of a nitrido-bridged dimeric vanadium(iv) complex. Dalton Trans 2020; 49:1200-1206. [PMID: 31903457 DOI: 10.1039/c9dt04544a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Two vanadium(iii) complexes, CztBu(PyriPr)2VCl2 (1) and CztBu(PyriPr)2V(N3)2 (2), were synthesized and characterized. Chemical reduction of both 1 and 2 gives the thermally stable nitrido-bridged vanadium(iv) dimer complex, [{CztBu(PyriPr)2}V]2(μ-N)2 (3), which is a rare example of a dimeric vanadium(iv) complex bridged by two nitrido ligands. The nitride ligands of 3 are unreactive due to the well-protected environment provided by the pincer ligand and its substituents, as is supported by its X-ray crystal structure and further described by DFT calculations.
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Affiliation(s)
- Adriana Lugosan
- Department of Chemistry and Biochemistry, Loyola University Chicago, Chicago, IL 60660, USA.
| | - Thomas Cundari
- Department of Chemistry, Center for Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, Denton, TX 76203, USA
| | - Kristin Fleming
- Department of Chemistry and Biochemistry, Loyola University Chicago, Chicago, IL 60660, USA.
| | - Diane A Dickie
- Department of Chemistry, Brandeis University, Waltham, MA 02453, USA
| | - Matthias Zeller
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Jack Ghannam
- Department of Chemistry and Biochemistry, Loyola University Chicago, Chicago, IL 60660, USA.
| | - Wei-Tsung Lee
- Department of Chemistry and Biochemistry, Loyola University Chicago, Chicago, IL 60660, USA.
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7
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Grant LN, Krzystek J, Pinter B, Telser J, Grützmacher H, Mindiola DJ. Finding a soft spot for vanadium: a P-bound OCP ligand. Chem Commun (Camb) 2019; 55:5966-5969. [PMID: 31050697 DOI: 10.1039/c9cc01500k] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transmetallation studies with the phosphaethynolate ion, [OCP]-, have largely resulted in coordination according to classical Lewis acid-base theory. That is, for harder early transition metal ions, O-bound coordination has been observed, whereas in the case of softer late transition metal ions, P-bound coordination predominates. Herein, we report the use of a V(iii) complex, namely [(nacnac)VCl(OAr)] (1) (nacnac- = [ArNC(CH3)]2CH; Ar = 2,6-iPr2C6H3), to transmetallate [OCP]- and bind via the P-atom as [(nacnac)V(OAr)(PCO)] (2), the first example of a 3d early transition metal that binds [OCP]-via the P-atom. Full characterization studies of this molecule including HFEPR spectroscopy, SQuID measurements, and theoretical studies are presented.
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Affiliation(s)
- Lauren N Grant
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - J Krzystek
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA
| | - Balazs Pinter
- Department of Chemistry, Universidad Técnica Federico Santa María, Valparaíso, 2390123, Chile
| | - Joshua Telser
- Department of Biological, Physical and Health Sciences, Roosevelt University, Chicago, IL 60605, USA
| | - Hansjörg Grützmacher
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog Weg1, Hönggerberg, Zürich 8093, Switzerland
| | - Daniel J Mindiola
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
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8
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Li P, Li L, Yue X, Wang Q, Pu M, Yang Z, Lei M. 1,2 addition or cycloaddition of allenes by a dihafnium μ−Nitrido complex? A DFT study. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.08.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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9
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Heins SP, Morris WD, Cundari TR, MacMillan SN, Lobkovsky EB, Livezey NM, Wolczanski PT. Complexes of [(dadi)Ti(L/X)]m That Reveal Redox Non-Innocence and a Stepwise Carbene Insertion into a Carbon–Carbon Bond. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00188] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Spencer P. Heins
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Wesley D. Morris
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Thomas R. Cundari
- Department of Chemistry, CASCaM, University of North Texas, Denton, Texas 76201, United States
| | - Samantha N. MacMillan
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Emil B. Lobkovsky
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Nicholas M. Livezey
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Peter T. Wolczanski
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
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10
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Zhang Y, Tong P, Yang D, Li J, Wang B, Qu J. Migratory insertion and hydrogenation of a bridging azide in a thiolate-bridged dicobalt reaction platform. Chem Commun (Camb) 2017; 53:9854-9857. [PMID: 28825085 DOI: 10.1039/c7cc05092e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A novel well-defined thiolate-bridged dicobalt azido complex is converted to a rare sulfilimide-bridged dicobalt complex via nitrogen atom migratory insertion into the Co-S bond upon thermolysis. Intriguingly, the homolytic cleavage of hydrogen is achieved by this azide under mild conditions to furnish a partially hydrogenated azido complex.
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Affiliation(s)
- Yixin Zhang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, P. R. China.
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11
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Sakiyama H, Chiba Y, Tone K, Yamasaki M, Mikuriya M, Krzystek J, Ozarowski A. Magnetic Properties of a Dinuclear Nickel(II) Complex with 2,6-Bis[(2-hydroxyethyl)methylaminomethyl]-4-methylphenolate. Inorg Chem 2017; 56:138-146. [PMID: 27976888 DOI: 10.1021/acs.inorgchem.6b01671] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Magnetic properties of dinuclear nickel(II) complex [Ni2(sym-hmp)2](BPh4)2·3.5DMF·0.5(2-PrOH) (1), where (sym-hmp)- is 2,6-bis[(2-hydroxyethyl)methylaminomethyl]-4-methylphenolate anion and DMF indicates dimethylformamide, were investigated using high-frequency and -field electron paramagnetic resonance (HFEPR). To magnetically characterize the mononuclear nickel(II) species forming the dimer, its two dinuclear zinc(II) analogues, [Zn2(sym-hmp)2](BPh4)2·3.5DMF·0.5(2-PrOH) (2) and [Zn2(sym-hmp)2](BPh4)2·2acetone·2H2O (2'), were prepared. One of them (2') was structurally characterized by X-ray diffractometry and doped with 5% mol nickel(II) ions to prepare a mixed crystal 3. From the HFEPR results on complex 1 obtained at 40 K, the spin Hamiltonian parameters of the first excited spin state (S = 1) of the dimer were accurately determined as |D1| = 9.99(2) cm-1, |E1| = 1.62(1) cm-1, and g1 = [2.25(1), 2.19(2), 2.27(2)], and for the second excited spin state (S = 2) at 150 K estimated as |D2| ≈ 3.5 cm-1. From these numbers, the single-ion zero-field splitting (ZFS) parameter of the Ni(II) ions forming the dimer was estimated as |DNi| ≈ 10-10.5 cm-1. The HFEPR spectra of 3 yielded directly the single-ion parameters for DNi = +10.1 cm-1, |ENi| = 3.1 cm-1, and giso = 2.2. On the basis of the HFEPR results, the previously obtained magnetic data (Sakiyama, H.; Tone, K.; Yamasaki, M.; Mikuriya, M. Inorg. Chim. Acta 2011, 365, 183) were reanalyzed, and the isotropic interaction parameter between the Ni(II) ions was determined as J = -70 cm-1 (Hex = -J SA·SB). Finally, density functional theory calculations yielded the J value of -90 cm-1 in a qualitative agreement with the experiment.
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Affiliation(s)
- Hiroshi Sakiyama
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University , 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
| | - Yukako Chiba
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University , 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
| | - Katsuya Tone
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University , 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
| | - Mikio Yamasaki
- X-ray Research Laboratory, Rigaku Corporation , Matsubara 3-9-12, Akishima, Tokyo 196-8666, Japan
| | - Masahiro Mikuriya
- Department of Applied Chemistry for Environment and Research Center for Coordination Molecule-based Devices, School of Science and Technology, Kwansei Gakuin University , Gakuen 2-1, Sanda 669-1337, Japan
| | - J Krzystek
- National High Magnetic Field Laboratory, Florida State University , Tallahassee, Florida 32310, United States
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University , Tallahassee, Florida 32310, United States
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12
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Camp C, Grant LN, Bergman RG, Arnold J. Photo-activation of d(0) niobium imido azides: en route to nitrido complexes. Chem Commun (Camb) 2016; 52:5538-41. [PMID: 27033145 DOI: 10.1039/c6cc02081j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the synthesis and photo-reactivity of d(0) niobium imido azido complexes supported by β-diketiminate ligands, which leads to the unprecedented formation of nitrides through a photo-assisted intramolecular rearrangement. This provides a new entry to metal nitrides that does not require low-valent metal centers and is a rare example in which the metal-imido moiety in group 5 complexes participates in reactivity.
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Affiliation(s)
- Clément Camp
- C2P2 UMR 5265 CNRS, Université Lyon 1, ESCPE Lyon, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Lauren N Grant
- Department of Chemistry, University of California, Berkeley, California 94720, USA.
| | - Robert G Bergman
- Department of Chemistry, University of California, Berkeley, California 94720, USA.
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720, USA.
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13
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Helgert TR, Zhang X, Box HK, Denny JA, Valle HU, Oliver AG, Akurathi G, Webster CE, Hollis TK. Extreme π-Loading as a Design Element for Accessing Imido Ligand Reactivity. A CCC-NHC Pincer Tantalum Bis(imido) Complex: Synthesis, Characterization, and Catalytic Oxidative Amination of Alkenes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00216] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Theodore R. Helgert
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
- Department
of Chemistry and Biochemistry, The University of Mississippi, Oxford, Mississippi 38655, United States
| | - Xiaofei Zhang
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Hannah K. Box
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Jason A. Denny
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Henry U. Valle
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Allen G. Oliver
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Gopalakrishna Akurathi
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Charles Edwin Webster
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - T. Keith Hollis
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
- Department
of Chemistry and Biochemistry, The University of Mississippi, Oxford, Mississippi 38655, United States
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14
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15
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Affiliation(s)
- Takashi Kurogi
- Department of Chemistry, University of Pennsylvania, 231 South
34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Carroll
- Department of Chemistry, University of Pennsylvania, 231 South
34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Daniel J. Mindiola
- Department of Chemistry, University of Pennsylvania, 231 South
34th Street, Philadelphia, Pennsylvania 19104, United States
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16
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Hohloch S, Kriegel BM, Bergman RG, Arnold J. Group 5 chemistry supported by β-diketiminate ligands. Dalton Trans 2016; 45:15725-15745. [DOI: 10.1039/c6dt01770c] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
β-Diketiminate (BDI) ligands are widely used supporting ligands in modern organometallic chemistry and are capable of stabilizing various metal complexes in multiple oxidation states and coordination environments.
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Affiliation(s)
| | | | | | - John Arnold
- Department of Chemistry
- University of California
- Berkeley
- USA
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17
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Camp C, Arnold J. On the non-innocence of “Nacnacs”: ligand-based reactivity in β-diketiminate supported coordination compounds. Dalton Trans 2016; 45:14462-98. [DOI: 10.1039/c6dt02013e] [Citation(s) in RCA: 133] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
While β-diketiminate (BDI or ‘nacnac’) ligands have been widely adopted to stabilize a wide range of metal ions in multiple oxidation states and coordination numbers, in several occurrences these ligands do not behave as spectators and participate in reactivity.
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Affiliation(s)
- Clément Camp
- Univ Lyon
- CNRS, ESCPE Lyon
- Université Claude Bernard Lyon 1
- C2P2 UMR 5265
- F-69616 Villeurbanne
| | - John Arnold
- Department of Chemistry
- University of California
- Berkeley
- USA
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18
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Pinter B, Smith KT, Kamitani M, Zolnhofer EM, Tran BL, Fortier S, Pink M, Wu G, Manor BC, Meyer K, Baik MH, Mindiola DJ. Cyclo-P3 Complexes of Vanadium: Redox Properties and Origin of the 31P NMR Chemical Shift. J Am Chem Soc 2015; 137:15247-61. [DOI: 10.1021/jacs.5b10074] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Balazs Pinter
- Department
of Chemistry and the Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
- Eenheid
Algemene Chemie (ALGC), Vrije Universiteit Brussel (VUB), Pleinlaan
2, 1050 Brussels, Belgium
| | - Kyle T. Smith
- Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia Pennsylvania 19104, United States
| | - Masahiro Kamitani
- Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia Pennsylvania 19104, United States
| | - Eva M. Zolnhofer
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich Alexander University Erlangen-Nürnberg (FAU), Egerlandstr. 1, 91058 Erlangen, Germany
| | - Ba L. Tran
- Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia Pennsylvania 19104, United States
| | - Skye Fortier
- Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia Pennsylvania 19104, United States
| | - Maren Pink
- Department
of Chemistry and the Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Gang Wu
- Department
of Chemistry, Queen’s University, Kingston, Ontario, Canada K7L 3N6
| | - Brian C. Manor
- Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia Pennsylvania 19104, United States
| | - Karsten Meyer
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich Alexander University Erlangen-Nürnberg (FAU), Egerlandstr. 1, 91058 Erlangen, Germany
| | - Mu-Hyun Baik
- Department
of Chemistry and the Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
- Department
of Chemistry, Korea Advanced Institute of Science and Technology, 34141 Daejeon, Korea
| | - Daniel J. Mindiola
- Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia Pennsylvania 19104, United States
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19
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Krzystek J, Ozarowski A, Telser J, Crans DC. High-frequency and -field electron paramagnetic resonance of vanadium(IV, III, and II) complexes. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.10.014] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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20
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Molecular complexes of group 13 element trihalides, pentafluorophenyl derivatives and Lewis superacids. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.02.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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Ermert DM, Gordon JB, Abboud KA, Murray LJ. Nitride-Bridged Triiron Complex and Its Relevance to Dinitrogen Activation. Inorg Chem 2015; 54:9282-9. [DOI: 10.1021/acs.inorgchem.5b00825] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David M. Ermert
- Department
of Chemistry, Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Jesse B. Gordon
- Department
of Chemistry, Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Khalil A. Abboud
- Department
of Chemistry, Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Leslie J. Murray
- Department
of Chemistry, Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
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22
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Thompson R, Tran BL, Ghosh S, Chen CH, Pink M, Gao X, Carroll PJ, Baik MH, Mindiola DJ. Addition of Si–H and B–H Bonds and Redox Reactivity Involving Low-Coordinate Nitrido–Vanadium Complexes. Inorg Chem 2015; 54:3068-77. [DOI: 10.1021/acs.inorgchem.5b00302] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rick Thompson
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Ba L. Tran
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Soumya Ghosh
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Chun-Hsing Chen
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Maren Pink
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Xinfeng Gao
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Patrick J. Carroll
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Mu-Hyun Baik
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Daniel J. Mindiola
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
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23
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Bacher F, Dömötör O, Kaltenbrunner M, Mojović M, Popović-Bijelić A, Gräslund A, Ozarowski A, Filipovic L, Radulović S, Enyedy ÉA, Arion VB. Effects of terminal dimethylation and metal coordination of proline-2-formylpyridine thiosemicarbazone hybrids on lipophilicity, antiproliferative activity, and hR2 RNR inhibition. Inorg Chem 2014; 53:12595-609. [PMID: 25391085 DOI: 10.1021/ic502239u] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The nickel(II), copper(II), and zinc(II) complexes of the proline-thiosemicarbazone hybrids 3-methyl-(S)-pyrrolidine-2-carboxylate-2-formylpyridine thiosemicarbazone (L-Pro-FTSC or (S)-H2L(1)) and 3-methyl-(R)-pyrrolidine-2-carboxylate-2-formylpyridine thiosemicarbazone (D-Pro-FTSC or (R)-H2L(1)), as well as 3-methyl-(S)-pyrrolidine-2-carboxylate-2-formylpyridine 4,4-dimethyl-thiosemicarbazone (dm-L-Pro-FTSC or (S)-H2L(2)), namely, [Ni(L-Pro-FTSC-2H)]2 (1), [Ni(D-Pro-FTSC-2H)]2 (2), [Ni(dm-L-Pro-FTSC-2H)]2 (3), [Cu(dm-L-Pro-FTSC-2H)] (6), [Zn(L-Pro-FTSC-2H)] (7), and [Zn(D-Pro-FTSC-2H)] (8), in addition to two previously reported, [Cu(L-Pro-FTSC-2H)] (4), [Cu(D-Pro-FTSC-2H)] (5), were synthesized and characterized by elemental analysis, one- and two-dimensional (1)H and (13)C NMR spectroscopy, circular dichroism, UV-vis, and electrospray ionization mass spectrometry. Compounds 1-3, 6, and 7 were also studied by single-crystal X-ray diffraction. Magnetic properties and solid-state high-field electron paramagnetic resonance spectra of 2 over the range of 50-420 GHz were investigated. The complex formation processes of L-Pro-FTSC with nickel(II) and zinc(II) were studied in aqueous solution due to the excellent water solubility of the complexes via pH potentiometry, UV-vis, and (1)H NMR spectroscopy. The results of the antiproliferative activity in vitro showed that dimethylation improves the cytotoxicity and hR2 RNR inhibition. Therefore, introduction of more lipophilic groups into thiosemicarbazone-proline backbone becomes an option for the synthesis of more efficient cytotoxic agents of this family of compounds.
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Affiliation(s)
- Felix Bacher
- Faculty of Chemistry, Institute of Inorganic Chemistry, University of Vienna , Währinger Strasse 42, A-1090 Vienna, Austria
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24
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Thompson R, Chen CH, Pink M, Wu G, Mindiola DJ. A Nitrido Salt Reagent of Titanium. J Am Chem Soc 2014; 136:8197-200. [DOI: 10.1021/ja504020t] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Rick Thompson
- Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Chun-Hsing Chen
- Department
of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Maren Pink
- Department
of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Gang Wu
- Department
of Chemistry, Queen’s University, 90 Bader Lane, Kingston, Ontario K7L
3N6, Canada
| | - Daniel J. Mindiola
- Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
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25
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26
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Karmel ISR, Elkin T, Fridman N, Eisen MS. Dimethylsilyl bis(amidinate)actinide complexes: synthesis and reactivity towards oxygen containing substrates. Dalton Trans 2014; 43:11376-87. [DOI: 10.1039/c4dt01361a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ligand1reacts with ThCl4and UCl4yielding complexes2and4, respectively. Complex3is obtained from complex2displaying extremely short Th–OH bond distances.
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Affiliation(s)
- Isabell S. R. Karmel
- Schulich Faculty of Chemistry
- Institute of Catalysis Science and Technology
- Technion – Israel Institute of Technology
- Technion City, 32000 Israel
| | - Tatyana Elkin
- Schulich Faculty of Chemistry
- Institute of Catalysis Science and Technology
- Technion – Israel Institute of Technology
- Technion City, 32000 Israel
| | - Natalia Fridman
- Schulich Faculty of Chemistry
- Institute of Catalysis Science and Technology
- Technion – Israel Institute of Technology
- Technion City, 32000 Israel
| | - Moris S. Eisen
- Schulich Faculty of Chemistry
- Institute of Catalysis Science and Technology
- Technion – Israel Institute of Technology
- Technion City, 32000 Israel
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