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Pietras N, Frąckowiak D, Kownacki I. Ball-Milling toward Nickel(II) Diphosphine Complexes for Direct Use in Catalysis. CHEMSUSCHEM 2024:e202400545. [PMID: 38860859 DOI: 10.1002/cssc.202400545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 05/09/2024] [Accepted: 06/11/2024] [Indexed: 06/12/2024]
Abstract
Mechanochemistry turned out to be a powerful synthetic tool enabling the first efficient synthesis of nickel(II) complexes with diphosphines. It has been demonstrated that solventless ball-milling of nickel(II) halides with diphosphines leads to the [NiX2(diphosphine)] type compounds, which can be directly used in catalysis without any purification. Moreover, it was confirmed that despite the presence of impurities in the resulting complexes, their catalytic activity remains identical to those obtained via traditional solvent-based methods.
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Affiliation(s)
- Natalia Pietras
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland
| | - Dawid Frąckowiak
- Center for Advanced Technologies, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 10, 61-614, Poznań, Poland
| | - Ireneusz Kownacki
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland
- Center for Advanced Technologies, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 10, 61-614, Poznań, Poland
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Lampropoulos C, Rashad G, Douvris C. Syntheses and Characterization of the First Cycloheptatrienyl Transition-Metal Complexes with a M-CF 3 Bond. Molecules 2021; 26:molecules26226838. [PMID: 34833932 PMCID: PMC8623133 DOI: 10.3390/molecules26226838] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 11/08/2021] [Indexed: 11/16/2022] Open
Abstract
The organometallic chemistry of metal complexes with organocyclic ligands of higher than five hapticity is much more lacking than the chemistry of metal complexes with η5-cyclopentadienyl ligands, which has been explored in considerable depth, resulting in novel advances. The main reason for this is stability. In particular, reports indicate that (η7-C7H7)MLn complexes are considerably less stable than analogous (η5-C5H5)MLn. In perfluoroalkyl metal chemistry, there is currently no reported (η7-C7H7)MLn derivative, whereas a number of alkylated ones are known and important conclusions have been drawn about their stability. Responding to this void, and using Morrison’s trifluoromethylating reagent, the present study reports the synthesis and characterization of the first cycloheptatrienyl molybdenum complexes bearing the trifluoromethyl moiety; (η7-C7H7)Mo(CO)2CF3 (I), and (η7-C7H7)Mo(CO)(PMe3)CF3 (II) and discusses their low thermal instability.
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Affiliation(s)
- Christos Lampropoulos
- DrL Consultations, Jacksonville, FL 32257, USA;
- Florida State College at Jacksonville, Jacksonville, FL 32202, USA
- James Weldon Johnson MS, Duval County Public Schools, Jacksonville, FL 32207, USA
| | - Gabriel Rashad
- Theobald Science Center, Department of Biological and Chemical Sciences, New York Institute of Technology, Old Westbury, NY 11568, USA;
| | - Chris Douvris
- Theobald Science Center, Department of Biological and Chemical Sciences, New York Institute of Technology, Old Westbury, NY 11568, USA;
- Correspondence: ; Tel.: +1-516-686-1202
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Kuwabara T, Sakajiri K, Oyama Y, Kodama S, Ishii Y. Molybdenum-Mediated Vinylidene Rearrangement of Internal Acylalkynes and Sulfonylalkynes. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00019] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takuya Kuwabara
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551 Japan
| | - Kousuke Sakajiri
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551 Japan
| | - Yousuke Oyama
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551 Japan
| | - Shintaro Kodama
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551 Japan
| | - Youichi Ishii
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551 Japan
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Gückel S, Gluyas JBG, El-Tarhuni S, Sobolev AN, Whiteley MW, Halet JF, Lapinte C, Kaupp M, Low PJ. Iron versus Ruthenium: Clarifying the Electronic Differences between Prototypical Mixed-Valence Organometallic Butadiyndiyl Bridged Molecular Wires. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00099] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Simon Gückel
- Institut für Chemie, Technische Universität Berlin, Sekr. C7, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | | | - Sarah El-Tarhuni
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | | | - Mark W. Whiteley
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | | | - Claude Lapinte
- Université Rennes, CNRS, ISCR - UMR 6226, F-35000 Rennes, France
| | - Martin Kaupp
- Institut für Chemie, Technische Universität Berlin, Sekr. C7, Strasse des 17. Juni 135, 10623 Berlin, Germany
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Ghosh P, Quiroz M, Wang N, Bhuvanesh N, Darensbourg MY. Complexes of MN 2S 2·Fe(η 5-C 5R 5)(CO) as platform for exploring cooperative heterobimetallic effects in HER electrocatalysis. Dalton Trans 2018; 46:5617-5624. [PMID: 28174781 DOI: 10.1039/c6dt04666e] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The control of aggregation at sulfur by metallodithiolates (MN2S2) has made them prime candidates as building blocks for the synthesis of biomimetics of various bimetallic enzyme active sites, with reactivity consequences implicating redox control by both metal centers. Recent studies of MN2S2 (M = Ni2+, Fe(NO)2+) bound to [(η5-C5H5)Fe(CO)]+ as electrocatalysts for proton reduction, the hydrogen evolution reaction, demonstrated reduction-induced hemi-lability of the bridging cis-dithiolates as a key step in the electrochemical proton reduction process (Ding, et al., J. Am. Chem. Soc., 2016, 138, 12920-12927). The MN2S2·Fe(η5-C5R5)(CO) platform offers numerous possibilities for tuning the electronic character of the M(μ-S2)Fe core. As well as modifying M within the metallodithiolate ligand, replacing H by CH3 at the η5-C5R5 moiety increases the electron density at the Fe center, which might facilitate the reductive Fe-S bond cleavage. Although release of a free thiolate in these hemi-labile ligands creates a needed internal pendant base, this benefit might be countered by the increase in over-potential for addition of the first electron. Herein we report the preparation and characterization of four bimetallic aggregates with the (η5-C5R5)Fe(CO) (R = H, CH3; Fe' or Fe*', respectively) or the dicarbonyl (η5-C5R5)Fe(CO)2 scaffold (R = H, CH3; Fe'' or Fe*'', respectively) bound to redox active MN2S2 ligands (M = Ni2+, Co(NO)2+; N2S2 = bismercaptoethane diazacycloheptane) Co-Fe*', Ni-Fe*', Co-Fe' and Co-Fe*'' complexes. The bidentate complexes were found to be electrocatalysts for proton reduction, although at high over-potential, especially for the derivatives of the electron-rich (η5-C5(CH3)5)Fe(CO)+. The turnover (TON) and turnover frequencies (TOF) were determined and found to be comparable to the previously reported MN2S2·Fe(η5-C5H5)(CO)+ analogues.
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Affiliation(s)
- Pokhraj Ghosh
- Department of Chemistry, Texas A & M University, College Station, Texas 77843, USA.
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King AK, Gallagher KJ, Mahon MF, Webster RL. Markovnikov versusanti-Markovnikov Hydrophosphination: Divergent Reactivity Using an Iron(II) β-Diketiminate Pre-Catalyst. Chemistry 2017; 23:9039-9043. [DOI: 10.1002/chem.201702374] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Andrew K. King
- Department of Chemistry; University of Bath; Claverton Down Bath UK
| | | | - Mary F. Mahon
- Department of Chemistry; University of Bath; Claverton Down Bath UK
| | - Ruth L. Webster
- Department of Chemistry; University of Bath; Claverton Down Bath UK
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Gluyas JBG, Brown NJ, Farmer JD, Low PJ. Optimised Syntheses of the Half-Sandwich Complexes FeCl(dppe)Cp*, FeCl(dppe)Cp, RuCl(dppe)Cp*, and RuCl(dppe)Cp. Aust J Chem 2017. [DOI: 10.1071/ch16322] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Thanks to their synthetic versatility, the half-sandwich metal chlorides MCl(dppe)(η5-C5R5) [M = Fe, Ru; dppe = 1,2-bis(diphenylphosphino)ethane, R = H (cyclopentadiene, Cp), CH3 (pentamethylcyclopentadiene, Cp*)] are staple starting materials in many organometallic laboratories. Here we present an overview of the synthetic methods currently available for FeCl(dppe)Cp*, FeCl(dppe)Cp, RuCl(dppe)Cp*, and RuCl(dppe)Cp, and describe in detail updated and optimised multigram syntheses of all four compounds.
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Alturaifi HA, Gerriow H, Gluyas JB, Mjörnstedt S, Raftery J, Low PJ, Whiteley MW. Synthesis, structure and redox chemistry of the aminoallenylidene complex [Mo{C C C(Me)NEt2}(dppe)(η-C7H7)][BPh4]. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.10.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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9
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El-Tarhuni S, Manhães LM, Morrill C, Raftery J, Randhawa JK, Whiteley MW. Synthesis of cyclopentadienyl iron alkoxycarbene complexes via vinylidene intermediates: X-ray structures of [Fe{C(OMe)Me}(dppe)Cp][I] and [Fe{C(CH2)3O}(dppe)Cp][PF6]. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.03.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Lunsford AM, Beto CC, Ding S, Erdem ÖF, Wang N, Bhuvanesh N, Hall MB, Darensbourg MY. Cyanide-bridged iron complexes as biomimetics of tri-iron arrangements in maturases of the H cluster of the di-iron hydrogenase. Chem Sci 2016; 7:3710-3719. [PMID: 30009000 PMCID: PMC6008931 DOI: 10.1039/c6sc00213g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 02/18/2016] [Indexed: 01/13/2023] Open
Abstract
Concepts from organometallic chemistry are used to define possibilities of cyanide as a docking unit for bioassembly processes.
Developing from certain catalytic processes required for ancient life forms, the H2 processing enzymes [NiFe]- and [FeFe]-hydrogenase (H2ase) have active sites that are organometallic in composition, possessing carbon monoxide and cyanide as ligands. Simple synthetic analogues of the 2Fe portion of the active site of [FeFe]-H2ase have been shown to dock into the empty carrier (maturation) protein, apo-Hyd-F, via the bridging ability of a terminal cyanide ligand from a low valent FeIFeI unit to the iron of a 4Fe4S cluster of Hyd-F, with spectral evidence indicating CN isomerization during the coupling process (Berggren, et al., Nature, 2013, 499, 66–70). To probe the requirements for such cyanide couplings, we have prepared and characterized four cyanide-bridged analogues of 3-Fe systems with features related to the organoiron moiety within the loaded HydF protein. As in classical organometallic chemistry, the orientation of the CN bridge in the biomimetics is determined by the precursor reagents; no cyanide flipping or linkage isomerization was observed. Density functional theory computations evaluated the energetics of cyanide isomerization in such [FeFe]–CN–Fe ⇌ [FeFe]–NC–Fe units, and found excessively high barriers account for the failure to observe the alternative isomers. These results highlight roles for cyanide as an unusual ligand in biology that may stabilize low spin iron in [FeFe]-hydrogenase, and can act as a bridge connecting multi-iron units during bioassembly of the active site.
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Affiliation(s)
- Allen M Lunsford
- Department of Chemistry , Texas A & M University , College Station , TX 77843 , USA .
| | - Christopher C Beto
- Department of Chemistry , Texas A & M University , College Station , TX 77843 , USA .
| | - Shengda Ding
- Department of Chemistry , Texas A & M University , College Station , TX 77843 , USA .
| | - Özlen F Erdem
- Department of Physics , Middle East Technical University , 06800 Ankara , Turkey
| | - Ning Wang
- Department of Chemistry , Texas A & M University , College Station , TX 77843 , USA .
| | - Nattamai Bhuvanesh
- Department of Chemistry , Texas A & M University , College Station , TX 77843 , USA .
| | - Michael B Hall
- Department of Chemistry , Texas A & M University , College Station , TX 77843 , USA .
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Patel D, Wooles A, Cornish AD, Steven L, Davies ES, Evans DJ, McMaster J, Lewis W, Blake AJ, Liddle ST. Synthesis and characterisation of halide, separated ion pair, and hydride cyclopentadienyl iron bis(diphenylphosphino)ethane derivatives. Dalton Trans 2015; 44:14159-77. [DOI: 10.1039/c5dt00704f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The synthesis and structures of 25 halide, separated ion pair, and hydride cyclopentadienyl iron bis(diphenylphosphino)ethane complexes are described.
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Affiliation(s)
- Dipti Patel
- School of Chemistry
- University of Nottingham
- University Park
- Nottingham
- UK
| | - Ashley Wooles
- School of Chemistry
- University of Nottingham
- University Park
- Nottingham
- UK
| | - Andrew D. Cornish
- School of Chemistry
- University of Nottingham
- University Park
- Nottingham
- UK
| | - Lindsey Steven
- School of Chemistry
- University of Nottingham
- University Park
- Nottingham
- UK
| | - E. Stephen Davies
- School of Chemistry
- University of Nottingham
- University Park
- Nottingham
- UK
| | | | - Jonathan McMaster
- School of Chemistry
- University of Nottingham
- University Park
- Nottingham
- UK
| | - William Lewis
- School of Chemistry
- University of Nottingham
- University Park
- Nottingham
- UK
| | | | - Stephen T. Liddle
- School of Chemistry
- University of Nottingham
- University Park
- Nottingham
- UK
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