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Lee HB, Ciolkowski N, Winslow C, Rittle J. High Spin Cobalt Complexes Supported by a Trigonal Tris(Phosphinimide) Ligand. Inorg Chem 2021; 60:11830-11837. [PMID: 34320321 DOI: 10.1021/acs.inorgchem.1c01400] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Terminal, π-basic moieties occupy a prominent position in the stabilization of unusual or reactive inorganic species. The electron-releasing, π-basic properties of phosphinimides (PN) have been employed to stabilize electron-deficient early transition metals and lanthanides. In principle, a ligand field comprised of terminal PN groups should enable access to high-valent states of late first row transition metals. Herein, we report a new class of multidentate phosphinimide ligands to logically explore this hypothesis. Access to such ligands is made possible by a new procedure for the electrophilic amination of rigid, sterically encumbering, multidentate phosphines. Such frameworks facilitate terminal PN coordination to cobalt as demonstrated by the synthesis of a trinuclear CoII3 complex and a homoleptic, three-coordinate CoIII complex. Interestingly, the CoIII complex exhibits an exceedingly rare S = 2 ground state. Combined XRD, magnetic susceptibility, and DFT studies highlight that terminally bound PNs engage in strong dπ-pπ interactions that present a weak ligand field appropriate to stabilize high-spin states of late transition metals.
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Affiliation(s)
- Heui Beom Lee
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Nicholas Ciolkowski
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Charles Winslow
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
| | - Jonathan Rittle
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
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2
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Fung CW, Fukada G, Mutoh Y, Tsuchida N, Saito S. Synthesis and properties of anionic ruthenium thionitrosyl and selenonitrosyl complexes that contain tetraanionic 2-hydroxybenzamidobenzene ligands. Dalton Trans 2020; 49:613-624. [PMID: 31833532 DOI: 10.1039/c9dt04219a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Although transition-metal complexes that contain thiocarbonyl (CS) and selenocarbonyl (CSe) ligands have been well studied, only three neutral or cationic selenonitrosyl (NSe) complexes have been reported, while anionic NSe complexes remain elusive. Herein, we report the first examples of anionic NSe-ligated ruthenium complexes, which were obtained from the reaction of anionic ruthenium nitrido complexes, elemental selenium, and 4-(N,N-dimethylamino)pyridine (DMAP). The structures of one of these ruthenium NSe complexes, as well as of the corresponding thionitrosyl (NS) and nitrosyl (NO) complexes, were systematically examined by X-ray diffraction analyses and theoretical calculations. In contrast to previous reportes, the NSe ligand in these complexes is a better π-acceptor than the NO and NS ligands and exhibits a stronger trans influence.
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Affiliation(s)
- Chi-Wai Fung
- Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
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Yu D, Shing KP, Liu Y, Liu H, Che CM. Ruthenium porphyrin catalysed intermolecular amino-oxyarylation of alkenes to give primary amines via a ruthenium nitrido intermediate. Chem Commun (Camb) 2019; 56:137-140. [PMID: 31799545 DOI: 10.1039/c9cc08043k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ruthenium porphyrin catalysed direct intermolecular amino-oxyarylation of alkenes including styrenes and 1,3-dienes to give primary amines with O-(2,4-dinitrophenyl)hydroxylamine as the amine source was achieved in moderate to good yields under mild reaction conditions. Spectroscopic analyses revealed that a ruthenium nitrido complex was the key reaction intermediate for the amino-oxyarylation reaction.
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Affiliation(s)
- Daohong Yu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, P. R. China
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4
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Cheung WM, Au-Yeung KC, Wong KH, So YM, Sung HHY, Williams ID, Leung WH. Reactions of cerium complexes with transition metal nitrides: synthesis and structure of heterometallic cerium complexes containing bridging catecholate ligands. Dalton Trans 2019; 48:13458-13465. [DOI: 10.1039/c9dt02959a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heterometallic cerium complexes containing bridging catecholate ligands have been synthesized from cerium complexes with Kläui's tripodal ligand and metal catecholates.
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Affiliation(s)
- Wai-Man Cheung
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Kowloon
- P. R. China
| | - Ka-Chun Au-Yeung
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Kowloon
- P. R. China
| | - Kai-Hong Wong
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Kowloon
- P. R. China
| | - Yat-Ming So
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Kowloon
- P. R. China
| | - Herman H. Y. Sung
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Kowloon
- P. R. China
| | - Ian D. Williams
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Kowloon
- P. R. China
| | - Wa-Hung Leung
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Kowloon
- P. R. China
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5
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Creutz SE, Peters JC. Spin-State Tuning at Pseudo-tetrahedral d6 Ions: Spin Crossover in [BP3]FeII–X Complexes. Inorg Chem 2016; 55:3894-906. [DOI: 10.1021/acs.inorgchem.6b00066] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sidney E. Creutz
- Division
of Chemistry and
Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Jonas C. Peters
- Division
of Chemistry and
Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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Morsing TJ, Reinholdt A, Sauer SPA, Bendix J. Ligand Sphere Conversions in Terminal Carbide Complexes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00803] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thorbjørn J. Morsing
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 København Ø, Denmark
| | - Anders Reinholdt
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 København Ø, Denmark
| | - Stephan P. A. Sauer
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 København Ø, Denmark
| | - Jesper Bendix
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 København Ø, Denmark
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7
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Halevi O, Bogoslavsky B, Grinstein D, Tibika-Apfelbaum F, Bino A. Synthesis and characterization of nitrogen rich ruthenium complexes. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.06.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Scepaniak JJ, Margarit CG, Harvey JN, Smith JM. Nitrogen Atom Transfer from Iron(IV) Nitrido Complexes: A Dual-Nature Transition State for Atom Transfer. Inorg Chem 2011; 50:9508-17. [DOI: 10.1021/ic201190c] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jeremiah J. Scepaniak
- Department of Chemistry and Biochemistry, New Mexico State University, MSC 3C, Las Cruces New Mexico 88003, United States
| | - Charles G. Margarit
- Department of Chemistry and Biochemistry, New Mexico State University, MSC 3C, Las Cruces New Mexico 88003, United States
| | - Jeremy N. Harvey
- Centre for Computational Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
| | - Jeremy M. Smith
- Department of Chemistry and Biochemistry, New Mexico State University, MSC 3C, Las Cruces New Mexico 88003, United States
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Best J, Sazanovich IV, Adams H, Bennett RD, Davies ES, Meijer AJHM, Towrie M, Tikhomirov SA, Bouganov OV, Ward MD, Weinstein JA. Structure and ultrafast dynamics of the charge-transfer excited state and redox activity of the ground state of mono- and binuclear platinum(II) diimine catecholate and bis-catecholate complexes: a transient absorption, TRIR, DFT, and electrochemical study. Inorg Chem 2011; 49:10041-56. [PMID: 20873855 DOI: 10.1021/ic101344t] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A series of mononuclear complexes of the type [Pt(Bu(2)cat)(4,4'-R(2)-bipy)] [where Bu(2)cat is the dianion of 3,5-(t)Bu(2)-catechol and R = H, (t)Bu, or C(O)NEt(2)] and analogous dinuclear complexes based on the "back-to-back" bis-catechol ligand 3,3',4,4'-tetrahydroxybiphenyl have been studied in detail in both their ground and excited states by a range of physical methods including electrochemistry, UV/vis/near-IR, IR, and electron paramagnetic resonance spectroelectrochemistry, and time-resolved IR (TRIR) and transient absorption (TA) spectroscopy. Density functional theory calculations have been performed to support these studies, which provide a detailed picture of the ground- and excited-state electronic structures, and excited-state dynamics, of these complexes. Notable observations include the following: (i) for the first time, the lowest-energy catecholate → bipyridine (bpy) ligand-to-ligand charge-transfer (LL'CT) excited states of these chromophores have been studied by TRIR spectroscopy, showing a range of transient bands associated with the bpy radical anion and semiquinone species, and back-electron-transfer occurring in hundreds of picoseconds; (ii) strong electronic coupling between the two catecholate units in the bridging ligand of the dinuclear complexes results in a delocalized, planar (class 3) "mixed-valence" catecholate(2-)/semiquinone(•-) state formed by one-electron oxidation of the bridging ligand; (iii) in the LL'CT excited state of the dinuclear complexes, the bridging ligand is symmetrical and delocalized, whereas the bpy radical anion is localized at one terminus of the complex. This study is the first example of an investigation of excited-state behavior in platinum(II) catecholate complexes, performed with the use of picosecond TRIR and femtosecond TA spectroscopy.
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Affiliation(s)
- Jonathan Best
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK
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12
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Lam NM, Yi XY, Lai CS, Cheung WM, Zhang QF, Williams ID, Leung WH. Ruthenium(VI) and osmium(VI) nitrido complexes with halogenated phenoxide and thiophenoxide ligands. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.09.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Liu CG, Su ZM, Guan W, Yan LK. Quantum Chemical Studies on High-Valent Metal Nitrido Derivatives of Keggin-Type Polyoxometalates ([PW11O39{MVIN}]4− (M = Ru, Os, Re)): MVI−N Bonding and Electronic Structures. Inorg Chem 2008; 48:541-8. [DOI: 10.1021/ic8012443] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Chun-Guang Liu
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Zhong-Min Su
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Wei Guan
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Li-Kai Yan
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
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Wang X, Andrews L. Infrared Spectra, Structure, and Bonding of the Group 6 and Ammonia M:NH3, H2N−MH, and N≡MH3 Reaction Products in Solid Argon. Organometallics 2008. [DOI: 10.1021/om8003459] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xuefeng Wang
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319
| | - Lester Andrews
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319
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