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Bhunia M, Sandoval‐Pauker C, Jafari MG, Grant LN, Gau MR, Pinter B, Mindiola DJ. Terminal and Super‐Basic Parent Imides of Hafnium. Angew Chem Int Ed Engl 2022; 61:e202209122. [DOI: 10.1002/anie.202209122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Mrinal Bhunia
- Department of Chemistry University of Pennsylvania Philadelphia PA 19104 USA
| | | | | | - Lauren N. Grant
- Department of Chemistry University of Pennsylvania Philadelphia PA 19104 USA
| | - Michael R. Gau
- Department of Chemistry University of Pennsylvania Philadelphia PA 19104 USA
| | - Balazs Pinter
- Department of Chemistry and Biochemistry University of Texas at El Paso El Paso TX 79968 USA
| | - Daniel J. Mindiola
- Department of Chemistry University of Pennsylvania Philadelphia PA 19104 USA
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Bhunia M, Sandoval-Pauker C, Jafari MG, Grant LN, Gau MR, Pinter B, Mindiola DJ. Terminal and Super‐Basic Parent Imides of Hafnium. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202209122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mrinal Bhunia
- University of Pennsylvania Department of Chemistry Chemistry UNITED STATES
| | | | | | - Lauren N. Grant
- University of Pennsylvania Department of Chemistry Chemistry UNITED STATES
| | - Michael R. Gau
- University of Pennsylvania Department of Chemistry Chemistry UNITED STATES
| | - Balazs Pinter
- The University of Texas at El Paso Chemistry UNITED STATES
| | - Daniel J. Mindiola
- University of Pennsylvania Department of Chemistry Chemistry 231 S. 34 Street 19104 Philadelphia UNITED STATES
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Watt FA, Krishna A, Golovanov G, Ott H, Schoch R, Wölper C, Neuba AG, Hohloch S. Monoanionic Anilidophosphine Ligand in Lanthanide Chemistry: Scope, Reactivity, and Electrochemistry. Inorg Chem 2020; 59:2719-2732. [PMID: 31961137 DOI: 10.1021/acs.inorgchem.9b03071] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We present the synthesis of a series of new lanthanide(III) complexes supported by a monoanionic bidentate anilidophosphine ligand (N-(2-(diisopropylphosphanyl)-4-methylphenyl)-2,4,6-trimethylanilide, short PN-). The work comprises the characterization of a variety of heteroleptic complexes containing either one or two PN ligands as well as a study on further functionalization possibilities. The new heteroleptic complexes cover selected examples over the whole lanthanide(III) series including lanthanum, cerium, neodymium, gadolinium, terbium, dysprosium, and lutetium. In case of the two diamagnetic metal cations lanthanum(III) and lutetium(III), we have furthermore studied the influence of the lanthanide ion (early vs. late) on the reactivity of these complexes. Thereby we found that the radius of the lanthanide ion has a major influence on the reactivity. Using sterically demanding, multidentate ligand systems, e.g., cyclopentadienide (Cp-), we found that the lanthanum complex La(PN)2Cl (1-La) reacts well to the corresponding cyclopentadienide complex, while for Lu(PN)2Cl (1-Lu) no reaction was observed under any conditions tested. On the contrary, employing monodentate ligands such as mesitolate, thiomesitolate, 2,4,6-trimethylanilide or 2,4,6-trimethylphenylphosphide, results in the clean formation of the desired complexes for both lanthanum and lutetium. All complexes have been studied by various techniques, including multi nuclear NMR spectroscopy and X-ray crystallography. 31P NMR spectroscopy was furthermore used to evaluate the presence of open coordination sites on the complexes using coordinating and noncoordinating solvents, and as a probe for estimating the Ce-P distance in the corresponding complexes. Additionally, we present cyclic voltammetry (CV) data for Ce(PN)2Cl (1-Ce), La(PN)2Cl (1-La), Ce(PN)(HMDS)2 (8-Ce) and La(PN)(HMDS)2 (8-La) (with HMDS = hexamethyldisilazide, (Me3Si)2N-) exploring the potential of the anilidophosphane ligand framework to stabilize a potential Ce(IV) ion.
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Affiliation(s)
- Fabian A Watt
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Athul Krishna
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Grigoriy Golovanov
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Holger Ott
- Training Center, Bruker AXS GmbH, Östliche Rheinbrückenstraße 49, 76187 Karlsruhe, Germany
| | - Roland Schoch
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Christoph Wölper
- Faculty of Chemistry, University of Essen-Duisburg, Universitätsstraße 5-7, 45141 Essen, Germany
| | - Adam G Neuba
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Stephan Hohloch
- Faculty of Chemistry and Pharmacy, Institute of General, Inorganic and Theoretical Chemistry, Leopold-Franzens-University Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
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Nakanishi Y, Ishida Y, Kawaguchi H. Synthesis and structures of titanium complexes bearing tetradentate tripodal [O 2XC] ligands (X = C, P). Dalton Trans 2020; 49:27-30. [PMID: 31802083 DOI: 10.1039/c9dt03969d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the synthesis and structures of titanium complexes supported by tripodal mixed-donor [O2CC] and [O2PC] ligands. Stepwise cyclometallation of a chelating bis(phenoxide) complex led to tetradentate binding of the [O2CC] ligand to the titanium center. Phosphination of a Ti-C bond of the [O2CC] complex afforded the tripodal [O2PC] ligand.
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Affiliation(s)
- Yusuke Nakanishi
- Department of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8551, Japan.
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Chen X, Gamer MT, Roesky PW. Synthesis and structural characterization of arsinoamides - early transition metal (Zr and Hf) and main group metal (Al, In, Sn, and Pb) complexes. Dalton Trans 2019; 48:15207-15211. [PMID: 31577304 DOI: 10.1039/c9dt03472b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
By reaction of MCl4 (M = Zr, Hf) with 2 equiv. of [(Mes2AsNPh){Li(OEt2)2}], the first group 4 metal arsinoamide complexes [(Mes2AsNPh)2MCl2(THF)] were synthesized. They feature two weak M-As interactions. After formally replacing the chloride atoms by the amido ligands [NMe2]-, a more diverse M-As interaction arises in [(Mes2AsNPh)2M(NMe2)2]: only one M-As contact can be observed with a substantially shorter distance. This type of interaction may originate from the steric effect of the substituents on the metal center. In addition, the coordination behavior of arsinoamide in main group metal chemistry was investigated. Thus, arsinoamide complexes of Al(iii), In(iii), Sn(ii) and Pb(ii) are reported. In contrast to the group 4 complexes, no M-As interaction can be detected in these four complexes.
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Affiliation(s)
- Xiao Chen
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, 76131 Karlsruhe, Germany.
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Grant LN, Mindiola DJ. The Rise of Phosphaethynolate Chemistry in Early Transition Metals, Actinides, and Rare‐Earth Complexes. Chemistry 2019; 25:16171-16178. [DOI: 10.1002/chem.201902871] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Lauren N. Grant
- Department of Chemistry University of Pennsylvania Philadelphia PA 19104 USA
| | - Daniel J. Mindiola
- Department of Chemistry University of Pennsylvania Philadelphia PA 19104 USA
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Beaumier EP, Pearce AJ, See XY, Tonks IA. Modern applications of low-valent early transition metals in synthesis and catalysis. Nat Rev Chem 2019; 3:15-34. [PMID: 30989127 PMCID: PMC6462221 DOI: 10.1038/s41570-018-0059-x] [Citation(s) in RCA: 132] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Low-valent early transition metals are often intrinsically highly reactive as a result of their strong propensity toward oxidation to more stable high-valent states. Harnessing these highly reducing complexes for productive reactivity is potentially powerful for C-C bond construction, organic reductions, small-molecule activation and many other reactions that offer orthogonal chemoselectivity and/or regioselectivity patterns to processes promoted by late transition metals. Recent years have seen many exciting new applications of low-valent metals through building new catalytic and/or multicomponent reaction manifolds out of classical reactivity patterns. In this Review, we survey new methods that employ early transition metals and invoke low-valent precursors or intermediates in order to identify common themes and strategies in synthesis and catalysis.
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Affiliation(s)
- Evan P. Beaumier
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
| | - Adam J. Pearce
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
| | - Xin Yi See
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
| | - Ian A. Tonks
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
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Grant LN, Pinter B, Gu J, Mindiola DJ. Molecular Zirconium Nitride Super Base from a Mononuclear Parent Imide. J Am Chem Soc 2018; 140:17399-17403. [DOI: 10.1021/jacs.8b11198] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Lauren N. Grant
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Balazs Pinter
- Department of Chemistry, Universidad Técnica Federico Santa María, Valparaíso 2390123, Chile
| | - Jun Gu
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Daniel J. Mindiola
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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Rahimi N, Herbert DE, Budzelaar PHM. Formation and Rearrangement of Reduced Diiminepyridine Complexes of Zr and Hf. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800918] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Naser Rahimi
- Department of Chemistry University of Manitoba 144 Dysart Road R3T 2N2 Winnipeg MB Canada
| | - David E. Herbert
- Department of Chemistry University of Manitoba 144 Dysart Road R3T 2N2 Winnipeg MB Canada
| | - Peter H. M. Budzelaar
- Department of Chemistry University of Manitoba 144 Dysart Road R3T 2N2 Winnipeg MB Canada
- Dipartimento di Scienze Chimiche Università di Napoli Federico II Via Cintia 4 80126 Napoli Italia
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Mullane KC, Ryu H, Cheisson T, Grant LN, Park JY, Manor BC, Carroll PJ, Baik MH, Mindiola DJ, Schelter EJ. C-H Bond Addition across a Transient Uranium-Nitrido Moiety and Formation of a Parent Uranium Imido Complex. J Am Chem Soc 2018; 140:11335-11340. [PMID: 30053376 DOI: 10.1021/jacs.8b06090] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Uranium complexes in the +3 and +4 oxidation states were prepared using the anionic PN- (PN- = ( N-(2-(diisopropylphosphino)-4-methylphenyl)-2,4,6-trimethylanilide) ligand framework. New complexes include the halide starting materials, (PN)2UIIII (1) and (PN)2UIVCl2 (2), which both yield (PN)2UIV(N3)2 (3) by reaction with NaN3. Compound 3 was reduced with potassium graphite to produce a putative, transient uranium-nitrido moiety that underwent an intramolecular C-H activation to form a rare example of a parent imido complex, [K(THF)3][(PN)UIV(═NH)[ iPr2P(C6H3Me)N(C6H2Me2CH2)]] (4). Calculated reaction energy profiles strongly suggest that a C-H insertion becomes unfavorable when a reductant is present, offering a distinctively different reaction pathway than previously observed for other uranium nitride complexes.
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Affiliation(s)
- Kimberly C Mullane
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia Pennsylvania 19104 , United States
| | - Ho Ryu
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141 , Republic of Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea
| | - Thibault Cheisson
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia Pennsylvania 19104 , United States
| | - Lauren N Grant
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia Pennsylvania 19104 , United States
| | - Ji Young Park
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea
| | - Brian C Manor
- 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
| | - Mu-Hyun Baik
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141 , Republic of Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea
| | - Daniel J Mindiola
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia Pennsylvania 19104 , United States
| | - Eric J Schelter
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia Pennsylvania 19104 , United States
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