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Ordoñez O, Yu X, Wu G, Autschbach J, Hayton TW. Assessing the 4f Orbital Participation in the Ln–C Bonds of [Li(THF) 4][Ln(C 6Cl 5) 4] (Ln = La, Ce). Inorg Chem 2022; 61:15138-15143. [DOI: 10.1021/acs.inorgchem.2c02304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Osvaldo Ordoñez
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Xiaojuan Yu
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, 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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2
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Lugosan A, Todtz SR, Alcázar A, Zeller M, Devery JJ, Lee WT. Synthesis and characterization of trigonal bipyramidal Fe III complexes and their solution behavior. Polyhedron 2021; 208. [PMID: 34566234 DOI: 10.1016/j.poly.2021.115384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
A series of air-stable trigonal bipyramidal FeIII complexes supported by a redox non-innocent NNN pincer ligand, Cz tBu(PyrR)2 - (R = iPr, Me, or H), were synthesized, fully characterized, and utilized for the investigation of the interaction between acetone and the FeIII center. The magnetic moments determined from the paramagnetic 1H NMR spectra in conjunction with EPR and Mössbauer spectroscopy indicate the presence of a high-spin ferric center. Cyclic voltammetry studies feature two quasi-reversible events corresponding to a metal-centered FeIII/II reduction around -0.40 V (vs. Fc) and a ligand-centered Cz tBu(PyrR)2/Cz tBu(PyrR)2 •+ oxidation at potentials near +0.70 V (vs. Fc). UV-Visible spectroscopy in CH2Cl2 showcases ligand-metal charge transfer (LMCT) bands, as well as coordination of acetone to Cz tBu(PyrH)2FeCl2. In situ IR spectroscopy and solution conductivity (κ) measurements of Cz tBu(PyrR)2FeCl2 with varied equivalents of acetone reveal that acetone is weakly associated with the iron center.
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Affiliation(s)
- Adriana Lugosan
- Department of Chemistry & Biochemistry, Loyola University Chicago, Flanner Hall, 1068 W Sheridan Rd, Chicago, IL 60660, United States
| | - Sophi R Todtz
- Department of Chemistry & Biochemistry, Loyola University Chicago, Flanner Hall, 1068 W Sheridan Rd, Chicago, IL 60660, United States
| | - Andrew Alcázar
- Department of Chemistry & Biochemistry, Loyola University Chicago, Flanner Hall, 1068 W Sheridan Rd, Chicago, IL 60660, United States
| | - Matthias Zeller
- Department of Chemistry, Purdue University, X-ray Crystallography, 560 Oval Drive, West Lafayette, IN 47907, United States
| | - James J Devery
- Department of Chemistry & Biochemistry, Loyola University Chicago, Flanner Hall, 1068 W Sheridan Rd, Chicago, IL 60660, United States
| | - Wei-Tsung Lee
- Department of Chemistry & Biochemistry, Loyola University Chicago, Flanner Hall, 1068 W Sheridan Rd, Chicago, IL 60660, United States
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3
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Ordoñez O, Yu X, Wu G, Autschbach J, Hayton TW. Homoleptic Perchlorophenyl "Ate" Complexes of Thorium(IV) and Uranium(IV). Inorg Chem 2021; 60:12436-12444. [PMID: 34328317 DOI: 10.1021/acs.inorgchem.1c01686] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The reaction of AnCl4(DME)n (An = Th, n = 2; U, n = 0) with 5 equiv of LiC6Cl5 in Et2O resulted in the formation of homoleptic actinide-aryl "ate" complexes [Li(DME)2(Et2O)]2[Li(DME)2][Th(C6Cl5)5]3 ([Li][1]) and [Li(Et2O)4][U(C6Cl5)5] ([Li][2]). Similarly, the reaction of AnCl4(DME)n (An = Th, n = 2; U, n = 0) with 3 equiv of LiC6Cl5 in Et2O resulted in the formation of heteroleptic actinide-aryl "ate" complexes [Li(DME)2(Et2O)][Li(Et2O)2][ThCl3(C6Cl5)3] ([Li][3]) and [Li(Et2O)3][UCl2(C6Cl5)3] ([Li][4]). Density functional calculations show that the An-Cipso σ-bonds are considerably more covalent for the uranium complexes vs the thorium analogues, in line with past results. Additionally, good agreement between experiment and calculations is obtained for the 13Cipso NMR chemical shifts in [Li][1] and [Li][3]. The calculations demonstrate a deshielding by ca. 29 ppm from spin-orbit coupling effects originating at Th, which is a direct consequence of 5f orbital participation in the Th-C bonds.
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Affiliation(s)
- Osvaldo Ordoñez
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Xiaojuan Yu
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, 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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4
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Tinnermann H, Sung S, Csókás D, Toh ZH, Fraser C, Young RD. Alkali Metal Adducts of an Iron(0) Complex and Their Synergistic FLP-Type Activation of Aliphatic C-X Bonds. J Am Chem Soc 2021; 143:10700-10708. [PMID: 34251818 DOI: 10.1021/jacs.1c04815] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We report the formation and full characterization of weak adducts between Li+ and Na+ cations and a neutral iron(0) complex, [Fe(CO)3(PMe3)2] (1), supported by weakly coordinating [BArF20] anions, [1·M][BArF20] (M = Li, Na). The adducts are found to synergistically activate aliphatic C-X bonds (X = F, Cl, Br, I, OMs, OTf), leading to the formation of iron(II) organyl compounds of the type [FeR(CO)3(PMe3)2][BArF20], of which several were isolated and fully characterized. Stoichiometric reactions with the resulting iron(II) organyl compounds show that this system can be utilized for homocoupling and cross-coupling reactions and the formation of new C-E bonds (E = C, H, O, N, S). Further, we utilize [1·M][BArF20] as a catalyst in a simple hydrodehalogenation reaction under mild conditions to showcase its potential use in catalytic reactions. Finally, the mechanism of activation is probed using DFT and kinetic experiments that reveal that the alkali metal and iron(0) center cooperate to cleave C-X via a mechanism closely related to intramolecular FLP activation.
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Affiliation(s)
- Hendrik Tinnermann
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Simon Sung
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Dániel Csókás
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Zhi Hao Toh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Craig Fraser
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Rowan D Young
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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5
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Ordoñez O, Yu X, Wu G, Autschbach J, Hayton TW. Synthesis and Characterization of Two Uranyl-Aryl "Ate" Complexes. Chemistry 2021; 27:5885-5889. [PMID: 33270947 DOI: 10.1002/chem.202005078] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Indexed: 11/10/2022]
Abstract
Reaction of [UO2 Cl2 (THF)3 ] with 3 equivalents of LiC6 Cl5 in Et2 O resulted in the formation of first uranyl aryl complex [Li(Et2 O)2 (THF)][UO2 (C6 Cl5 )3 ] ([Li][1]) in good yields. Subsequent dissolution of [Li][1] in THF resulted in conversion into [Li(THF)4 ][UO2 (C6 Cl5 )3 (THF)] ([Li][2]), also in good yields. DFT calculations reveal that the U-C bonds in [Li][1] and [Li][2] exhibit appreciable covalency. Additionally, the 13 C NMR chemical shifts for their Cipso environments are strongly affected by spin-orbit coupling-a consequence of 5f orbital participation in the U-C bonds.
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Affiliation(s)
- Osvaldo Ordoñez
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Xiaojuan Yu
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, 14260, USA
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, 14260, USA
| | - Trevor W Hayton
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
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6
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Wang Z, Peng X, Wong HNC. Ligand‐Free Iron‐Catalyzed Homo‐Coupling of Aryllithium Reagents. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000242] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Zhi‐Yong Wang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin, New Territories, Hong Kong SAR P. R. China
| | - Xiao‐Shui Peng
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin, New Territories, Hong Kong SAR P. R. China
- School of Science and Engineering The Chinese University of Hong Kong (Shenzhen) Shenzhen P. R. China
| | - Henry N. C. Wong
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin, New Territories, Hong Kong SAR P. R. China
- School of Science and Engineering The Chinese University of Hong Kong (Shenzhen) Shenzhen P. R. China
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7
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Khedkar A, Roemelt M. An ab initio multireference study of reductive eliminations from organoferrates( iii) in the gas-phase: it is all about the spin state. Phys Chem Chem Phys 2020; 22:17677-17686. [DOI: 10.1039/d0cp02834g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reductive elimination reaction from organoferrates(iii) of the composition [FeR3R′]− is studied by state-of-the-art multireference electronic structure calculations.
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Affiliation(s)
- Abhishek Khedkar
- Lehrstuhl für Theoretische Chemie
- Ruhr-Universität Bochum
- D-44780 Bochum
- Germany
| | - Michael Roemelt
- Lehrstuhl für Theoretische Chemie
- Ruhr-Universität Bochum
- D-44780 Bochum
- Germany
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8
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Zhang S, Song Y, He X, Angamuthu R, Tung CH, Wang W. Reductive Coupling of Bridging Diaryl Ligands in Half-Sandwich Cobalt(II) Dimers: Revisiting Triple-Decker Cobalt(I) Complexes. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00439] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Shengnan Zhang
- Key Lab of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan 250100, PR China
| | - Yike Song
- Key Lab of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan 250100, PR China
| | - Xueshan He
- Key Lab of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan 250100, PR China
| | - Raja Angamuthu
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Chen-Ho Tung
- Key Lab of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan 250100, PR China
| | - Wenguang Wang
- Key Lab of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, No. 27 South Shanda Road, Jinan 250100, PR China
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Heravi MM, Zadsirjan V, Hajiabbasi P, Hamidi H. Advances in Kumada–Tamao–Corriu cross-coupling reaction: an update. MONATSHEFTE FUR CHEMIE 2019. [DOI: 10.1007/s00706-019-2364-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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10
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Zhong Z, Wang ZY, Ni SF, Dang L, Lee HK, Peng XS, Wong HNC. Ligand-Free Iron-Catalyzed Carbon (sp 2)-Carbon (sp 2) Oxidative Homo-Coupling of Alkenyllithiums. Org Lett 2019; 21:700-704. [PMID: 30675791 DOI: 10.1021/acs.orglett.8b03893] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A new strategy was developed for the efficient synthesis of di-, tetra-, and hexa-substituted 1,3-butadienes. This one-pot procedure involves lithium-iodine exchange to generate the corresponding vinyllithium intermediates. A subsequent iron-catalyzed ligand-free oxidative homo-coupling eventually led to the formation of 1,3-butadienes in acceptable to excellent isolated yields.
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Affiliation(s)
- Zhuliang Zhong
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong SAR, China
| | - Zhi-Yong Wang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong SAR, China
| | - Shao-Fei Ni
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province , Shantou University , Shantou , Guangdong 515063 , P. R. China
| | - Li Dang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province , Shantou University , Shantou , Guangdong 515063 , P. R. China
| | - Hung Kay Lee
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong SAR, China
| | - Xiao-Shui Peng
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong SAR, China.,Shenzhen Center of Novel Functional Molecules, Shenzhen Research Institute , The Chinese University of Hong Kong , No. 10, Second Yuexing Road , Shenzhen 518507 , P. R. China
| | - Henry N C Wong
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry , The Chinese University of Hong Kong , Shatin , New Territories, Hong Kong SAR, China.,Shenzhen Center of Novel Functional Molecules, Shenzhen Research Institute , The Chinese University of Hong Kong , No. 10, Second Yuexing Road , Shenzhen 518507 , P. R. China
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11
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Parchomyk T, Koszinowski K. Electronic and Steric Effects on the Reductive Elimination of Anionic Arylferrate(III) Complexes. Chemistry 2018; 24:16342-16347. [PMID: 29969518 DOI: 10.1002/chem.201801003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Indexed: 11/11/2022]
Abstract
Arylferrate(III) complexes Ph3 FeR- (R=para- and ortho-substituted aryl) are proposed as model systems for the in-depth investigation of reductive eliminations from organoiron(III) species. Electrospray ionization transfers the arylferrate complexes prepared in situ from solution into the gas phase, where mass selection ensures a well-defined population of reactant ions. Upon gas-phase fragmentation, the arylferrate complexes undergo reductive elimination of the cross-coupling product PhR as well as the homo-coupling product Ph2 . The measured branching ratios between the two competing reaction channels are used to construct a Hammett plot, which shows that electron-donating aryl groups R favor the formation of the cross-coupling product. In this way, the complexes avoid the build-up of too much electron density at the iron center during the reductive elimination. ortho Substitution in R increases the fraction of the homo-coupling product, presumably by hindering the approach between the two aryl groups participating in the reductive elimination. The obtained mechanistic insight substantially advances our understanding of one of the central elementary steps of transition-metal-catalyzed cross-coupling reactions.
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Affiliation(s)
- Tobias Parchomyk
- Institut für Organische und Biomolekulare Chemie, Universität Göttingen, Tammannstr. 2, 37077, Göttingen, Germany
| | - Konrad Koszinowski
- Institut für Organische und Biomolekulare Chemie, Universität Göttingen, Tammannstr. 2, 37077, Göttingen, Germany
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Parchomyk T, Demeshko S, Meyer F, Koszinowski K. Oxidation States, Stability, and Reactivity of Organoferrate Complexes. J Am Chem Soc 2018; 140:9709-9720. [PMID: 29991250 DOI: 10.1021/jacs.8b06001] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We have applied a combination of electrospray-ionization mass spectrometry, electrical conductivity measurements, and Mössbauer spectroscopy to identify and characterize the organoferrate species R nFe m- formed upon the transmetalation of iron precursors (Fe(acac)3, FeCl3, FeCl2, Fe(OAc)2) with Grignard reagents RMgX (R = Me, Et, Bu, Hex, Oct, Dec, Me3SiCH2, Bn, Ph, Mes, 3,5-(CF3)2-C6H3; X = Cl, Br) in tetrahydrofuran. The observed organoferrates show a large variety in their aggregation (1 ≤ m ≤ 8) and oxidation states (I to IV), which are chiefly determined by the nature of their organyl groups R. In numerous cases, the addition of a bidentate amine or phosphine changes the distributions of organoferrates and affects their stability. Besides undergoing efficient intermolecular exchange processes, several of the probed organoferrates react with organyl (pseudo)halides R'X (R' = Et, iPr, Bu, Ph, p-Tol; X = Cl, Br, I, OTf) to afford heteroleptic complexes of the type R3FeR'-. Gas-phase fragmentation of most of these complexes results in reductive eliminations of the coupling products RR' (or, alternatively, of R2). This finding indicates that iron-catalyzed cross-coupling reactions may proceed via such heteroleptic organoferrates R3FeR'- as intermediates. Gas-phase fragmentation of other organoferrate complexes leads to β-hydrogen eliminations, the loss of arenes, and the expulsion of organyl radicals. The operation of both one- and two-electron processes is consistent with previous observations and contributes to the formidable complexity of organoiron chemistry.
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Affiliation(s)
- Tobias Parchomyk
- Institut für Organische und Biomolekulare Chemie , Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Serhiy Demeshko
- Institut für Anorganische Chemie , Universität Göttingen , Tammannstraße 4 , 37077 Göttingen , Germany
| | - Franc Meyer
- Institut für Anorganische Chemie , Universität Göttingen , Tammannstraße 4 , 37077 Göttingen , Germany
| | - Konrad Koszinowski
- Institut für Organische und Biomolekulare Chemie , Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
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13
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Huang Z, Zhang D, Lee JF, Lei A. Elucidating the structure of a high-spin σ-phenyliron(iii) species in a live FeCl 3-PhZnCl reaction system. Chem Commun (Camb) 2018; 54:1481-1484. [PMID: 29359210 DOI: 10.1039/c7cc09737a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Environmentally benign iron catalysts promote a wide variety of chemical transformations; however, insight into the mechanism and active intermediates is far from satisfactory, and the main difficulties lie in directly "seeing" the active species under "live" catalytic conditions. Herein, an unknown sextet Ph(THF)FeCl2 species was well-characterized in a live FeCl3-PhZnCl reaction system for the first time by Raman, in situ IR, electron paramagnetic resonance (EPR), X-ray absorption spectroscopic (XAS) and density functional theory (DFT) calculations. This work provides insight into the structure and reactivity of catalytically relevant σ-aryliron(iii) species, and shall provide useful guidelines for understanding iron chemistry.
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Affiliation(s)
- Zhiliang Huang
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China.
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15
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Clémancey M, Cantat T, Blondin G, Latour JM, Dorlet P, Lefèvre G. Structural Insights into the Nature of Fe0 and FeI Low-Valent Species Obtained upon the Reduction of Iron Salts by Aryl Grignard Reagents. Inorg Chem 2017; 56:3834-3848. [DOI: 10.1021/acs.inorgchem.6b02616] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Martin Clémancey
- Université Grenoble Alpes, LCBM/PMB and CEA, BIG/CBM/PMB and CNRS, LCBM UMR 5249, PMB, 38000 Grenoble, France
| | - Thibault Cantat
- NIMBE, CEA, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Geneviève Blondin
- Université Grenoble Alpes, LCBM/PMB and CEA, BIG/CBM/PMB and CNRS, LCBM UMR 5249, PMB, 38000 Grenoble, France
| | - Jean-Marc Latour
- Université Grenoble Alpes, LCBM/PMB and CEA, BIG/CBM/PMB and CNRS, LCBM UMR 5249, PMB, 38000 Grenoble, France
| | - Pierre Dorlet
- Institute
for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
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16
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Liu Y, Luo L, Xiao J, Wang L, Song Y, Qu J, Luo Y, Deng L. Four-Coordinate Iron(II) Diaryl Compounds with Monodentate N-Heterocyclic Carbene Ligation: Synthesis, Characterization, and Their Tetrahedral-Square Planar Isomerization in Solution. Inorg Chem 2015; 54:4752-60. [PMID: 25822256 DOI: 10.1021/acs.inorgchem.5b00138] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The salt elimination reactions of (IPr2Me2)2FeCl2 (IPr2Me2 = 1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene) with the corresponding aryl Grignard reagents afford [(IPr2Me2)2FeAr2] (Ar = Ph, 3; C6H4-p-Me, 4; C6H4-p-(t)Bu, 5; C6H3-3,5-(CF3)2, 6) in good yields. X-ray crystallographic studies revealed the presence of both tetrahedral and trans square planar isomers for 3 and 6 and the tetrahedral structures for 4 and 5. Magnetic susceptibility and (57)Fe Mössbauer spectrum measurements on the solid samples indicated the high-spin (S = 2) and intermediate-spin (S = 1) nature of the tetrahedral and square planar structures, respectively. Solution property studies, including solution magnetic susceptibility measurement, variable-temperature (1)H and (19)F NMR, and absorption spectroscopy, on 3-6, as well as an (57)Fe Mössbauer spectrum study on a frozen tetrahydrofuran solution of tetrahedral [(IPr2Me2)2(57)FePh2] suggest the coexistence of tetrahedral and trans square planar structures in solution phase. Density functional theory calculations on (IPr2Me2)2FePh2 disclosed that the tetrahedral and trans square planar isomers are close in energy and that the geometry isomerization can occur by spin-change-coupled geometric transformation on four-coordinate iron(II) center.
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Affiliation(s)
- Yuesheng Liu
- †State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, People's Republic of China, 200032
| | - Lun Luo
- ‡State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian, People's Republic of China, 116024
| | - Jie Xiao
- †State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, People's Republic of China, 200032
| | - Lei Wang
- †State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, People's Republic of China, 200032
| | - You Song
- ∥State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, People's Republic of China, 210093
| | - Jingping Qu
- ‡State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian, People's Republic of China, 116024
| | - Yi Luo
- ‡State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian, People's Republic of China, 116024
| | - Liang Deng
- †State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, People's Republic of China, 200032
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Fohlmeister L, Vignesh KR, Winter F, Moubaraki B, Rajaraman G, Pöttgen R, Murray KS, Jones C. Neutral diiron(iii) complexes with Fe2(μ-E)2 (E = O, S, Se) core structures: reactivity of an iron(i) dimer towards chalcogens. Dalton Trans 2015; 44:1700-8. [DOI: 10.1039/c4dt03081h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Three neutral guanidinato bis(μ-chalcogenido)diiron(iii) complexes (e.g. see picture) have been prepared from reactions of an iron(i) dimer with elemental chalcogens.
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Affiliation(s)
| | - Kuduva R. Vignesh
- Department of Chemistry
- Indian Institute of Technology Bombay Powai
- Mumbai 400076
- India
- IITB-Monash Research Academy
| | - Florian Winter
- Institut für Anorganische und Analytische Chemie
- D-48149 Münster
- Germany
| | | | - Gopalan Rajaraman
- Department of Chemistry
- Indian Institute of Technology Bombay Powai
- Mumbai 400076
- India
| | - Rainer Pöttgen
- Institut für Anorganische und Analytische Chemie
- D-48149 Münster
- Germany
| | | | - Cameron Jones
- School of Chemistry
- Monash University
- Melbourne
- Australia
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18
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Al-Afyouni MH, Fillman KL, Brennessel WW, Neidig ML. Isolation and characterization of a tetramethyliron(III) ferrate: an intermediate in the reduction pathway of ferric salts with MeMgBr. J Am Chem Soc 2014; 136:15457-60. [PMID: 25333789 PMCID: PMC4227835 DOI: 10.1021/ja5080757] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
While iron-catalyzed Kumada cross-coupling reactions with simple iron salts have been known since the early 1970s, the nature of the in situ-formed iron species remains elusive. Herein, we report the synthesis of the homoleptic tetralkyliron(III) ferrate complex [MgCl(THF)5][FeMe4] from the reaction of FeCl3 with MeMgBr in THF. Upon warming, this distorted square-planar S = (3)/2 species converts to the S = (1)/2 species originally observed by Kochi and co-workers with concomitant formation of ethane, consistent with its intermediacy in the reduction pathway of FeCl3 to generate the reduced iron species involved in catalysis.
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Affiliation(s)
- Malik H Al-Afyouni
- Department of Chemistry, University of Rochester , Rochester, New York 14627, United States
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19
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García-Monforte MA, Ara I, Martín A, Menjón B, Tomás M, Alonso PJ, Arauzo AB, Martínez JI, Rillo C. Homoleptic Organocobalt(III) Compounds with Intermediate Spin. Inorg Chem 2014; 53:12384-95. [DOI: 10.1021/ic501719y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. Angeles García-Monforte
- Instituto de Síntesis Química
y Catálisis Homogénea (iSQCH) and ‡Instituto de Ciencia de Materiales
de Aragón (ICMA), CSIC−Universidad de Zaragoza, C/Pedro
Cerbuna 12, E-50009 Zaragoza, Spain
| | - Irene Ara
- Instituto de Síntesis Química
y Catálisis Homogénea (iSQCH) and ‡Instituto de Ciencia de Materiales
de Aragón (ICMA), CSIC−Universidad de Zaragoza, C/Pedro
Cerbuna 12, E-50009 Zaragoza, Spain
| | - Antonio Martín
- Instituto de Síntesis Química
y Catálisis Homogénea (iSQCH) and ‡Instituto de Ciencia de Materiales
de Aragón (ICMA), CSIC−Universidad de Zaragoza, C/Pedro
Cerbuna 12, E-50009 Zaragoza, Spain
| | - Babil Menjón
- Instituto de Síntesis Química
y Catálisis Homogénea (iSQCH) and ‡Instituto de Ciencia de Materiales
de Aragón (ICMA), CSIC−Universidad de Zaragoza, C/Pedro
Cerbuna 12, E-50009 Zaragoza, Spain
| | - Milagros Tomás
- Instituto de Síntesis Química
y Catálisis Homogénea (iSQCH) and ‡Instituto de Ciencia de Materiales
de Aragón (ICMA), CSIC−Universidad de Zaragoza, C/Pedro
Cerbuna 12, E-50009 Zaragoza, Spain
| | - Pablo J. Alonso
- Instituto de Síntesis Química
y Catálisis Homogénea (iSQCH) and ‡Instituto de Ciencia de Materiales
de Aragón (ICMA), CSIC−Universidad de Zaragoza, C/Pedro
Cerbuna 12, E-50009 Zaragoza, Spain
| | - Ana B. Arauzo
- Instituto de Síntesis Química
y Catálisis Homogénea (iSQCH) and ‡Instituto de Ciencia de Materiales
de Aragón (ICMA), CSIC−Universidad de Zaragoza, C/Pedro
Cerbuna 12, E-50009 Zaragoza, Spain
| | - Jesús I. Martínez
- Instituto de Síntesis Química
y Catálisis Homogénea (iSQCH) and ‡Instituto de Ciencia de Materiales
de Aragón (ICMA), CSIC−Universidad de Zaragoza, C/Pedro
Cerbuna 12, E-50009 Zaragoza, Spain
| | - Conrado Rillo
- Instituto de Síntesis Química
y Catálisis Homogénea (iSQCH) and ‡Instituto de Ciencia de Materiales
de Aragón (ICMA), CSIC−Universidad de Zaragoza, C/Pedro
Cerbuna 12, E-50009 Zaragoza, Spain
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20
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Bedford RB, Brenner PB, Carter E, Cogswell PM, Haddow MF, Harvey JN, Murphy DM, Nunn J, Woodall CH. TMEDA in der Eisen-katalysierten Kumada-Kupplung: homoleptische at-Komplexe statt Diaminaddukte. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201308395] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Bedford RB, Brenner PB, Carter E, Cogswell PM, Haddow MF, Harvey JN, Murphy DM, Nunn J, Woodall CH. TMEDA in Iron-Catalyzed Kumada Coupling: Amine Adduct versus Homoleptic “ate” Complex Formation. Angew Chem Int Ed Engl 2014; 53:1804-8. [DOI: 10.1002/anie.201308395] [Citation(s) in RCA: 128] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 10/31/2013] [Indexed: 11/09/2022]
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22
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Mongin F, Harrison-Marchand A. Mixed AggregAte (MAA): A Single Concept for All Dipolar Organometallic Aggregates. 2. Syntheses and Reactivities of Homo/HeteroMAAs. Chem Rev 2013; 113:7563-727. [DOI: 10.1021/cr3002966] [Citation(s) in RCA: 149] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Florence Mongin
- Equipe Chimie et Photonique Moléculaires, Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Bât. 10A, Case 1003, Campus de Beaulieu, Avenue du Général Leclerc, 35042 Rennes Cédex, France
| | - Anne Harrison-Marchand
- Laboratoire COBRA de l′Université de Rouen, INSA de Rouen, CNRS, UMR 6014 & FR 3038, IRCOF, Rue Tesnière, 76821 Mont St Aignan Cédex, France
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23
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Šalitroš I, Boča R, Herchel R, Moncol J, Nemec I, Ruben M, Renz F. Mixed-Valence Heptanuclear Iron Complexes with Ferromagnetic Interaction. Inorg Chem 2012; 51:12755-67. [DOI: 10.1021/ic3015833] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ivan Šalitroš
- Institute of Inorganic Chemistry,
Faculty of Chemical and Food Technology, Slovak University of Technology, SK-812 37 Bratislava, Slovakia
| | - Roman Boča
- Institute of Inorganic Chemistry,
Faculty of Chemical and Food Technology, Slovak University of Technology, SK-812 37 Bratislava, Slovakia
| | - Radovan Herchel
- Regional Centre of Advanced
Technologies and Materials, Department of Inorganic Chemistry, Faculty
of Science, Palacký University,
17. Listopadu 12, CZ-77146 Olomouc, Czech Republic
| | - Ján Moncol
- Institute of Inorganic Chemistry,
Faculty of Chemical and Food Technology, Slovak University of Technology, SK-812 37 Bratislava, Slovakia
| | - Ivan Nemec
- Regional Centre of Advanced
Technologies and Materials, Department of Inorganic Chemistry, Faculty
of Science, Palacký University,
17. Listopadu 12, CZ-77146 Olomouc, Czech Republic
| | - Mario Ruben
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Postfach 3640, D-76021
Karlsruhe, Germany
| | - Franz Renz
- Institut
für Anorganische
Chemie, Leibniz Universität Hannover, Callinstrasse 9, D-30167 Hannover, Germany
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24
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Mossin S, Tran BL, Adhikari D, Pink M, Heinemann FW, Sutter J, Szilagyi RK, Meyer K, Mindiola DJ. A mononuclear Fe(III) single molecule magnet with a 3/2↔5/2 spin crossover. J Am Chem Soc 2012; 134:13651-61. [PMID: 22817325 PMCID: PMC3495239 DOI: 10.1021/ja302660k] [Citation(s) in RCA: 236] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The air stable complex [(PNP)FeCl(2)] (1) (PNP = N[2-P(CHMe(2))(2)-4-methylphenyl](2)(-)), prepared from one-electron oxidation of [(PNP)FeCl] with ClCPh(3), displays an unexpected S = 3/2 to S = 5/2 transition above 80 K as inferred by the dc SQUID magnetic susceptibility measurement. The ac SQUID magnetization data, at zero field and between frequencies 10 and 1042 Hz, clearly reveal complex 1 to have frequency dependence on the out-of-phase signal and thus being a single molecular magnet with a thermally activated barrier of U(eff) = 32-36 cm(-1) (47-52 K). Variable-temperature Mössbauer data also corroborate a significant temperature dependence in δ and ΔE(Q) values for 1, which is in agreement with the system undergoing a change in spin state. Likewise, variable-temperature X-band EPR spectra of 1 reveals the S = 3/2 to be likely the ground state with the S = 5/2 being close in energy. Multiedge XAS absorption spectra suggest the electronic structure of 1 to be highly covalent with an effective iron oxidation state that is more reduced than the typical ferric complexes due to the significant interaction of the phosphine groups in PNP and Cl ligands with iron. A variable-temperature single crystal X-ray diffraction study of 1 collected between 30 and 300 K also reveals elongation of the Fe-P bond lengths and increment in the Cl-Fe-Cl angle as the S = 5/2 state is populated. Theoretical studies show overall similar orbital pictures except for the d(z(2)) orbital, which has the most sensitivity to change in the geometry and bonding, where the quartet ((4)B) and the sextet ((6)A) states are close in energy.
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Affiliation(s)
- Susanne Mossin
- Centre for Catalysis and Sustainable Chemistry, Technical University of Denmark, 2800 Lyngby, Denmark
| | - Ba L. Tran
- Department of Chemistry and the Molecular Structure Center, Indiana University, Bloomington, IN USA 47405
| | - Debashis Adhikari
- Department of Chemistry and the Molecular Structure Center, Indiana University, Bloomington, IN USA 47405
| | - Maren Pink
- Department of Chemistry and the Molecular Structure Center, Indiana University, Bloomington, IN USA 47405
| | - Frank W. Heinemann
- Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nuremburg, Erlangen, Germany 91058
| | - Jörg Sutter
- Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nuremburg, Erlangen, Germany 91058
| | - Robert K. Szilagyi
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana USA 59717
| | - Karsten Meyer
- Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nuremburg, Erlangen, Germany 91058
| | - Daniel J. Mindiola
- Department of Chemistry and the Molecular Structure Center, Indiana University, Bloomington, IN USA 47405
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25
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Nakajima Y, Ozawa F. Redox Chemistry of Bis(phosphaethenyl)pyridine Iron Complexes. Organometallics 2012. [DOI: 10.1021/om201280z] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yumiko Nakajima
- International Research Center of Elements Science (IRCELS),
Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Fumiyuki Ozawa
- International Research Center of Elements Science (IRCELS),
Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
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26
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Kleimark J, Larsson PF, Emamy P, Hedström A, Norrby PO. Low Temperature Studies of Iron-Catalyzed Cross-Coupling of Alkyl Grignard Reagents with Aryl Electrophiles. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100392] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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27
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Yamaguchi Y, Ando H, Nagaya M, Hinago H, Ito T, Asami M. Synthesis of Iron(III) Complex Bearing Tridentate β-Aminoketonato Ligand: Application to Iron-catalyzed Cross-coupling Reaction of Arylmagnesium Bromides with Alkyl Halides. CHEM LETT 2011. [DOI: 10.1246/cl.2011.983] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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28
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Sanyal R, Cameron SA, Brooker S. Synthesis and complexes of an N4 Schiff-base macrocycle derived from 2,2′-iminobisbenzaldehyde. Dalton Trans 2011; 40:12277-87. [DOI: 10.1039/c1dt10730e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Bhattacharya D, Sarkar S. Synthesis, Structural, Redox and Mössbauer Characterization of Four‐Electron‐Oxidized Tetrakis(cyclohexyl)iron(II)porphodimethene with Different Axial Ligations. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Dibyendu Bhattacharya
- Department of Chemistry, Indian Institute of Technology – Kanpur, Kanpur 208016, Uttar Pradesh, India, Fax: +91‐512‐2597265
| | - Sabyasachi Sarkar
- Department of Chemistry, Indian Institute of Technology – Kanpur, Kanpur 208016, Uttar Pradesh, India, Fax: +91‐512‐2597265
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30
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Volpe EC, Wolczanski PT, Lobkovsky EB. Aryl-Containing Pyridine-Imine and Azaallyl Chelates of Iron toward Strong Field Coordination Compounds. Organometallics 2009. [DOI: 10.1021/om900793c] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Emily C. Volpe
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853
| | - Peter T. Wolczanski
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853
| | - Emil B. Lobkovsky
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853
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31
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Alonso PJ, Arauzo AB, García-Monforte MA, Martín A, Menjón B, Rillo C, Tomás M. Homoleptic organoderivatives of high-valent nickel(III). Chemistry 2009; 15:11020-30. [PMID: 19760717 DOI: 10.1002/chem.200901259] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Homoleptic perhalophenyl derivatives of divalent nickel complexes with the general formula [NBu(4)](2)[Ni(II)(C(6)X(5))(4)] [X=F (1), Cl (2)] have been prepared by low-temperature treatment of the halo-complex precursor [NBu(4)](2)[NiBr(4)] with the corresponding organolithium reagent LiC(6)X(5). Compounds 1 and 2 are electrochemically related by reversible one-electron exchange processes with the corresponding organometallate(III) compounds [NBu(4)][Ni(III)(C(6)X(5))(4)] [X=F (3), Cl (4)]. The potentials of the [Ni(III)(C(6)X(5))(4)](-)/[Ni(II)(C(6)X(5))(4)](2-) couples are +0.07 and -0.11 V for X=F or Cl, respectively. Compounds 3 and 4 have also been prepared and isolated in good yield by chemical oxidation of 1 or 2 with bromine or the amminium salt [N(C(6)H(4)Br-4)(3)][SbCl(6)]. The [Ni(III)(C(6)X(5))(4)](-) species have SP-4 structures in the salts 3 and 4, as established by single-crystal X-ray diffraction methods. The [Ni(II)(C(6)F(5))(4)](2-) ion in the parent compound 1 has also been found to exhibit a rather similar SP-4 structure. According to their SP-4 geometry, the Ni(III) compounds (d(7)) behave as S=1/2 systems both at microscopic (EPR) and macroscopic levels (ac and dc magnetization measurements). The spin Hamiltonian parameters obtained from the analysis of the magnetic behavior of 3 and 4 within the framework of ligand field theory show that the unpaired electron is centered mainly on the metal atom, with >97 % estimated d(z(2) ) contribution. Thermal decomposition of 3 and 4 proceeds with formation of the corresponding C(6)X(5)--C(6)X(5) coupling compounds.
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Affiliation(s)
- Pablo J Alonso
- Instituto de Ciencia de Materiales de Aragón (I.C.M.A.), Universidad de Zaragoza-C.S.I.C. C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
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32
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Kleimark J, Hedström A, Larsson PF, Johansson C, Norrby PO. Mechanistic Investigation of Iron-Catalyzed Coupling Reactions. ChemCatChem 2009. [DOI: 10.1002/cctc.200900061] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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33
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Hatakeyama T, Hashimoto S, Ishizuka K, Nakamura M. Highly Selective Biaryl Cross-Coupling Reactions between Aryl Halides and Aryl Grignard Reagents: A New Catalyst Combination of N-Heterocyclic Carbenes and Iron, Cobalt, and Nickel Fluorides. J Am Chem Soc 2009; 131:11949-63. [DOI: 10.1021/ja9039289] [Citation(s) in RCA: 266] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takuji Hatakeyama
- International Research Center for Elements Science, Institute for Chemical Research, Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, and Institute of Sustainability Science, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Sigma Hashimoto
- International Research Center for Elements Science, Institute for Chemical Research, Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, and Institute of Sustainability Science, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Kentaro Ishizuka
- International Research Center for Elements Science, Institute for Chemical Research, Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, and Institute of Sustainability Science, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Masaharu Nakamura
- International Research Center for Elements Science, Institute for Chemical Research, Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, and Institute of Sustainability Science, Kyoto University, Uji, Kyoto 611-0011, Japan
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34
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Roy N, Sproules S, Bill E, Weyhermüller T, Wieghardt K. Molecular and Electronic Structure of the Square Planar Bis(o-amidobenzenethiolato)iron(III) Anion and Its Bis(o-quinoxalinedithiolato)iron(III) Analogue. Inorg Chem 2008; 47:10911-20. [DOI: 10.1021/ic801109n] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nabarun Roy
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Stephen Sproules
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Eckhard Bill
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Thomas Weyhermüller
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Karl Wieghardt
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
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35
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Fürstner A, Martin R, Krause H, Seidel G, Goddard R, Lehmann CW. Preparation, Structure, and Reactivity of Nonstabilized Organoiron Compounds. Implications for Iron-Catalyzed Cross Coupling Reactions. J Am Chem Soc 2008; 130:8773-87. [DOI: 10.1021/ja801466t] [Citation(s) in RCA: 420] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Rubén Martin
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Helga Krause
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Günter Seidel
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Richard Goddard
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
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36
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Cirera J, Ruiz E, Alvarez S. Stereochemistry and Spin State in Four-Coordinate Transition Metal Compounds. Inorg Chem 2008; 47:2871-89. [DOI: 10.1021/ic702276k] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jordi Cirera
- Departament de Química Inorgànica and Institut de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica and Institut de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
| | - Santiago Alvarez
- Departament de Química Inorgànica and Institut de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
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37
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Zhang G, Huang X, Li G, Zhang L. Au-Containing All-Carbon 1,4-Dipoles: Generation and [4 + 2] Annulation in the Formation of Carbo-/Heterocycles. J Am Chem Soc 2008; 130:1814-5. [DOI: 10.1021/ja077948e] [Citation(s) in RCA: 196] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guozhu Zhang
- Department of Chemistry/216, University of Nevada, Reno, 1664 North Virginia Street, Reno, Nevada 89557
| | - Xiaogen Huang
- Department of Chemistry/216, University of Nevada, Reno, 1664 North Virginia Street, Reno, Nevada 89557
| | - Guotao Li
- Department of Chemistry/216, University of Nevada, Reno, 1664 North Virginia Street, Reno, Nevada 89557
| | - Liming Zhang
- Department of Chemistry/216, University of Nevada, Reno, 1664 North Virginia Street, Reno, Nevada 89557
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38
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Xiong T, Zhang Q, Zhang Z, Liu Q. A Divergent Synthesis of γ-Iminolactones, Dihydroquinolin-2-ones, and γ-Lactames from β-Hydroxymethylcyclopropanylamides. J Org Chem 2007; 72:8005-9. [PMID: 17877406 DOI: 10.1021/jo701495s] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Gamma-iminolactones 2, dihydroquinolin-2-ones 3, and gamma-lactames 4 have been synthesized starting from beta-hydroxymethylcyclopropanylamides 1, mediated by SnCl4/NaI/NEt3, BF3.OEt2, and TiCl4/NEt3. The corresponding products 2, 3, and 4 were produced, respectively, in high to excellent yields.
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Affiliation(s)
- Tao Xiong
- Department of Chemistry, Northeast Normal University, Changchun, 130024, People's Republic of China
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39
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Cahiez G, Habiak V, Duplais C, Moyeux A. Iron-catalyzed alkylations of aromatic grignard reagents. Angew Chem Int Ed Engl 2007; 46:4364-6. [PMID: 17465438 DOI: 10.1002/anie.200700742] [Citation(s) in RCA: 291] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Gérard Cahiez
- Laboratoire de Synthèse Organique Sélective et de Chimie Organométallique (SOSCO), UMR 8123 CNRS-UCP-ESCOM, 5 Mail Gay-Lussac, Neuville s/Oise, 95092 Cergy-Pontoise, France.
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40
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Cahiez G, Habiak V, Duplais C, Moyeux A. Iron-Catalyzed Alkylations of Aromatic Grignard Reagents. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200700742] [Citation(s) in RCA: 125] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Sniady A, Durham A, Morreale MS, Wheeler KA, Dembinski R. Room Temperature Zinc Chloride-Catalyzed Cycloisomerization of Alk-3-yn-1-ones: Synthesis of Substituted Furans. Org Lett 2007; 9:1175-8. [PMID: 17328552 DOI: 10.1021/ol062539t] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[structure: see text]. 5-Endo-dig cycloisomerization of 1,4-di- and 1,2,4-trisubstituted but-3-yn-1-ones in the presence of a catalytic amount of zinc chloride (10 mol %) in dichloromethane at room temperature (22 degrees C) provides 2,5-di- and 2,3,5-trisubstituted furans in high yields (85-97%).
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Affiliation(s)
- Adam Sniady
- Department of Chemistry, Oakland University, Rochester, MI 48309-4477, USA
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García-Monforte MA, Alonso PJ, Forniés J, Menjón B. New advances in homoleptic organotransition-metal compounds: The case of perhalophenyl ligands. Dalton Trans 2007:3347-59. [PMID: 17664969 DOI: 10.1039/b708938d] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Homoleptic derivatives of formula [M(C(6)X(5))(n)](z-) (X = F, Cl) have been prepared and isolated for every first-row transition metal as well as for several of the heavier ones. The stoichiometry attained in each case (n ranging between 2 and 6) can be understood considering the tendency of a given metal ion to compensate its coordinative and electronic unsaturation, while not incurring severe interligand repulsive effects. The molecular structures associated with each stoichiometry seem, in turn, to be governed by electronic rather than steric factors. Most of these [M(C(6)X(5))(n)](z-) compounds are unsaturated, open-shell organometallic species, not fulfilling the 18-electron (or Effective Atomic Number) rule. This behaviour can be attributed to the absence of pi stabilising ligands (such as CO, phosphines, alkenes, alkynes, a variety of substituted aromatic rings, and so on) which are otherwise ubiquitous in organotransition-metal chemistry. The magnetic properties of the [M(C(6)X(5))(n)](z-) species have been determined by EPR spectroscopy and/or bulk magnetisation measurements. Excellent correlation between molecular geometry and magnetic properties (whether diamagnetic or paramagnetic) has been observed. Many of these compounds undergo chemically- or electrochemically-induced electron exchange processes. These redox reactions proceed without alteration in the stoichiometry of the [M(C(6)X(5))(n)](z-) compound, but usually involve a sharp change in the molecular geometry according to the different electron configuration of the interrelated species.
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Affiliation(s)
- M Angeles García-Monforte
- Instituto de Ciencia de Materiales de Aragón, Facultad de Ciencias, Universidad de Zaragoza-C.S.I.C., C/Pedro Cerbuna 12, E-50009, Zaragoza, Spain
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