1
|
Tseng CC, Ding YW, Chen ZY, Lan HY, Li HJ, Cheng YS, Kuo TS, Chen PL, Wu WC, Shi FK, Yang T, Liu HJ. A Bis-Cyclopentadienyl Ligand-Supported Di-Iron Trihydride Motif as a Synthon for Access to Heterobimetallic Trinuclear Complexes. Inorg Chem 2024; 63:11361-11368. [PMID: 38815165 PMCID: PMC11190976 DOI: 10.1021/acs.inorgchem.4c01420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 05/14/2024] [Accepted: 05/17/2024] [Indexed: 06/01/2024]
Abstract
Herein, we report the synthesis of a flexible bis-cyclopentadienyl ligand L (the doubly deprotonated form of H2L (1,3-bis(2,4-di-tert-butylcyclopentadienyldimethylsilyl)benzene)), demonstrating its ability to stabilize a series of di-iron hydrido complexes. Notably, this ligand facilitates the isolation of an unprecedented anionic cyclopentadienyl ligand-supported di-iron trihydride complex, LFe2(μ-H)3Li(THF) (2), functioning as a synthon for the [Fe2(μ-H)3]- core and providing access to heterobimetallic complexes 4-6 with coinage metals.
Collapse
Affiliation(s)
- Chung-Ching Tseng
- Department
of Applied Chemistry, National Yang Ming
Chiao Tung University, 1001 Daxue Rd, East District, Hsinchu City 300093, Taiwan
| | - Yi-Wun Ding
- Department
of Applied Chemistry, National Yang Ming
Chiao Tung University, 1001 Daxue Rd, East District, Hsinchu City 300093, Taiwan
| | - Zhong-Yue Chen
- Department
of Applied Chemistry, National Yang Ming
Chiao Tung University, 1001 Daxue Rd, East District, Hsinchu City 300093, Taiwan
| | - Hao-Yuan Lan
- Department
of Applied Chemistry, National Yang Ming
Chiao Tung University, 1001 Daxue Rd, East District, Hsinchu City 300093, Taiwan
| | - Han-Jung Li
- Department
of Applied Chemistry, National Yang Ming
Chiao Tung University, 1001 Daxue Rd, East District, Hsinchu City 300093, Taiwan
| | - You-Song Cheng
- Department
of Applied Chemistry, National Yang Ming
Chiao Tung University, 1001 Daxue Rd, East District, Hsinchu City 300093, Taiwan
| | - Ting-Shen Kuo
- Department
of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Pei-Lin Chen
- Department
of Chemistry, National Tsing Hua University, Hsinchu City 300044, Taiwan
| | - Wen-Chun Wu
- Rezwave
Technology Inc., 3F-5,
79, Hsin Tai Wu Rd., Sec.1, HsiChih District, New Taipei City 221432, Taiwan
| | - Fong-Ku Shi
- Rezwave
Technology Inc., 3F-5,
79, Hsin Tai Wu Rd., Sec.1, HsiChih District, New Taipei City 221432, Taiwan
| | - Tzuhsiung Yang
- Department
of Chemistry, National Tsing Hua University, Hsinchu City 300044, Taiwan
| | - Hsueh-Ju Liu
- Department
of Applied Chemistry, National Yang Ming
Chiao Tung University, 1001 Daxue Rd, East District, Hsinchu City 300093, Taiwan
- Center
for Emergent Functional Matter Science, National Yang Ming Chiao Tung University, 1001 Daxue Rd, East District, Hsinchu City 300093, Taiwan
| |
Collapse
|
2
|
Lauk S, Schäfer A. Pentaisopropyl Cyclopentadienyl: An Overview across the Periodic Table. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100770] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sergej Lauk
- Department of Chemistry, Faculty of Natural Sciences and Technology Saarland University Campus Saarbrücken 66123 Saarbrücken Germany
| | - André Schäfer
- Department of Chemistry, Faculty of Natural Sciences and Technology Saarland University Campus Saarbrücken 66123 Saarbrücken Germany
| |
Collapse
|
3
|
Smytschkow I, Gidt W, Sun Y, Langer J, Böttcher T, Kubíčková L, Kaman O, Sitzmann H. Chromium(II) Alkylcyclopentadienyl Complexes with Carbon or Hydride Donor Ligands. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Igor Smytschkow
- FB Chemie der TUK, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Wjatscheslaw Gidt
- FB Chemie der TUK, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Yu Sun
- FB Chemie der TUK, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Jens Langer
- Department Chemie und Pharmazie, FAU Erlangen-Nürnberg, Egerlandstr. 1, 91058 Erlangen, Germany
| | - Tobias Böttcher
- Institut für Anorganische und Analytische Chemie, Albertstr. 21, 79104 Freiburg, Germany
| | - Lenka Kubíčková
- Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10/112, 162 00 Praha 6, Czech Republic
- Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 180 00 Praha 8, Czech Republic
| | - Ondřej Kaman
- Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10/112, 162 00 Praha 6, Czech Republic
| | - Helmut Sitzmann
- FB Chemie der TUK, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| |
Collapse
|
4
|
Winkler M, Schnierle M, Ehrlich F, Mehnert KI, Hunger D, Sheveleva AM, Burkhardt L, Bauer M, Tuna F, Ringenberg MR, van Slageren J. Electronic Structure of a Diiron Complex: A Multitechnique Experimental Study of [(dppf)Fe(CO) 3] +/0. Inorg Chem 2021; 60:2856-2865. [PMID: 33569942 DOI: 10.1021/acs.inorgchem.0c03259] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Here we explore the electronic structure of the diiron complex [(dppf)Fe(CO)3]0/+ [10/+; dppf = 1,1'-bis(diphenylphosphino)ferrocene] in two oxidation states by an advanced multitechnique experimental approach. A combination of magnetic circular dichroism, X-ray absorption and emission, high-frequency electron paramagnetic resonance (EPR), and Mössbauer spectroscopies is used to establish that oxidation of 10 occurs on the carbonyl iron ion, resulting in a low-spin iron(I) ion. It is shown that an unequivocal result is obtained by combining several methods. Compound 1+ displays slow spin dynamics, which is used here to study its geometric structure by means of pulsed EPR methods. Surprisingly, these data show an association of the tetrakis[3,5-bis(trifluoromethylphenyl)]borate counterion with 1+.
Collapse
Affiliation(s)
- Mario Winkler
- Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart 70569, Germany
| | - Marc Schnierle
- Institute of Inorganic Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart 70569, Germany
| | - Felix Ehrlich
- Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart 70569, Germany
| | - Kim-Isabelle Mehnert
- Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart 70569, Germany
| | - David Hunger
- Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart 70569, Germany
| | - Alena M Sheveleva
- Department of Chemistry and Photon Science Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Lukas Burkhardt
- Department of Chemistry and Center for Sustainable Systems Design, Paderborn University, Warburger Strasse 100, Paderborn 33098, Germany
| | - Matthias Bauer
- Department of Chemistry and Center for Sustainable Systems Design, Paderborn University, Warburger Strasse 100, Paderborn 33098, Germany
| | - Floriana Tuna
- Department of Chemistry and Photon Science Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Mark R Ringenberg
- Institute of Inorganic Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart 70569, Germany
| | - Joris van Slageren
- Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart 70569, Germany
| |
Collapse
|
5
|
Chakraborty U, Bügel P, Fritsch L, Weigend F, Bauer M, Jacobi von Wangelin A. Planar Iron Hydride Nanoclusters: Combined Spectroscopic and Theoretical Insights into Structures and Building Principles. ChemistryOpen 2021; 10:265-271. [PMID: 33646644 PMCID: PMC7919527 DOI: 10.1002/open.202000307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 02/17/2021] [Indexed: 11/11/2022] Open
Abstract
The controlled assembly of well-defined planar nanoclusters from molecular precursors is synthetically challenging and often plagued by the predominant formation of 3D-structures and nanoparticles. Herein, we report planar iron hydride nanoclusters from reactions of main group element hydrides with iron(II) bis(hexamethyldisilazide). The structures and properties of isolated Fe4 , Fe6 , and Fe7 nanoplatelets and calculated intermediates enable an unprecedented insight into the underlying building principle and growth mechanism of iron clusters, metal monolayers, and nanoparticles.
Collapse
Affiliation(s)
- Uttam Chakraborty
- Dept. of ChemistryUniversity of Hamburg Martin Luther King Pl. 620146HamburgGermany
| | - Patrick Bügel
- Institut für NanotechnologieKarlsruher Institut für Technologie (KIT)v.-Helmholtz Pl. 176344Eggenstein-LeopoldshafenGermany
| | - Lorena Fritsch
- Dept. of Chemistry, Center for Sustainable Systems Design (CSSD)University of PaderbornWarburger Str. 10033098PaderbornGermany
| | - Florian Weigend
- Institut für NanotechnologieKarlsruher Institut für Technologie (KIT)v.-Helmholtz Pl. 176344Eggenstein-LeopoldshafenGermany
- Fachbereich ChemiePhilipps-Universität MarburgHans-Meerwein-Str. 435032MarburgGermany
| | - Matthias Bauer
- Dept. of Chemistry, Center for Sustainable Systems Design (CSSD)University of PaderbornWarburger Str. 10033098PaderbornGermany
| | | |
Collapse
|
6
|
Bai X, Mei T, Yang D, Su L, Wang B, Qu J. Synthesis, characterization and reactivity toward small molecules of a diiron tetrahydrido bridged complex. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.108286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
7
|
Lim H, Baker ML, Cowley RE, Kim S, Bhadra M, Siegler MA, Kroll T, Sokaras D, Weng TC, Biswas DR, Dooley DM, Karlin KD, Hedman B, Hodgson KO, Solomon EI. Kβ X-ray Emission Spectroscopy as a Probe of Cu(I) Sites: Application to the Cu(I) Site in Preprocessed Galactose Oxidase. Inorg Chem 2020; 59:16567-16581. [PMID: 33136386 DOI: 10.1021/acs.inorgchem.0c02495] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cu(I) active sites in metalloproteins are involved in O2 activation, but their O2 reactivity is difficult to study due to the Cu(I) d10 closed shell which precludes the use of conventional spectroscopic methods. Kβ X-ray emission spectroscopy (XES) is a promising technique for investigating Cu(I) sites as it detects photons emitted by electronic transitions from occupied orbitals. Here, we demonstrate the utility of Kβ XES in probing Cu(I) sites in model complexes and a metalloprotein. Using Cu(I)Cl, emission features from double-ionization (DI) states are identified using varying incident X-ray photon energies, and a reasonable method to correct the data to remove DI contributions is presented. Kβ XES spectra of Cu(I) model complexes, having biologically relevant N/S ligands and different coordination numbers, are compared and analyzed, with the aid of density functional theory (DFT) calculations, to evaluate the sensitivity of the spectral features to the ligand environment. While the low-energy Kβ2,5 emission feature reflects the ionization energy of ligand np valence orbitals, the high-energy Kβ2,5 emission feature corresponds to transitions from molecular orbitals (MOs) having mainly Cu 3d character with the intensities determined by ligand-mediated d-p mixing. A Kβ XES spectrum of the Cu(I) site in preprocessed galactose oxidase (GOpre) supports the 1Tyr/2His structural model that was determined by our previous X-ray absorption spectroscopy and DFT study. The high-energy Kβ2,5 emission feature in the Cu(I)-GOpre data has information about the MO containing mostly Cu 3dx2-y2 character that is the frontier molecular orbital (FMO) for O2 activation, which shows the potential of Kβ XES in probing the Cu(I) FMO associated with small-molecule activation in metalloproteins.
Collapse
Affiliation(s)
- Hyeongtaek Lim
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Michael L Baker
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Ryan E Cowley
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Sunghee Kim
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Mayukh Bhadra
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Maxime A Siegler
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Thomas Kroll
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Dimosthenis Sokaras
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Tsu-Chien Weng
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Dalia R Biswas
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States
| | - David M Dooley
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States.,University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Kenneth D Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Britt Hedman
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Keith O Hodgson
- Department of Chemistry, Stanford University, Stanford, California 94305, United States.,Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States.,Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| |
Collapse
|
8
|
Burkhardt L, Vukadinovic Y, Nowakowski M, Kalinko A, Rudolph J, Carlsson PA, Jacob CR, Bauer M. Electronic Structure of the Hieber Anion [Fe(CO) 3(NO)] - Revisited by X-ray Emission and Absorption Spectroscopy. Inorg Chem 2020; 59:3551-3561. [PMID: 32125149 DOI: 10.1021/acs.inorgchem.9b02092] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
While the Hieber anion [Fe(CO)3(NO)]- has been reincarnated in the last years as an active catalyst in organic synthesis, there is still a debate about the oxidation state of the central Fe atom and the resulting charge of the NO ligand. To shed new light on this question and to understand the Fe-NO interaction in the Hieber anion, it is investigated in comparison to the formal 3d8 reference Fe(CO)5 and the formal 3d10 reference [Fe(CO)4]2- by the combination of valence-to-core X-ray emission spectroscopy (VtC-XES), X-ray absorption near-edge structure spectroscopy (XANES), and high-energy-resolution fluorescence-detected XANES. In order to extract information about the electronic structure, time-dependent density functional theory and ground-state density functional theory calculations are applied. This combination of experimental and computational methods reveals that the electron density at the Fe center of the Hieber resembles that of the isoelectronic [Fe(CO)4]2-. These observations challenge recent descriptions of the Hieber anion and reopen the debate about the experimentally and computationally determined Fe oxidation state and charge on the NO ligand.
Collapse
Affiliation(s)
- Lukas Burkhardt
- Department of Chemistry and Center for Sustainable Systems Design, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Yannik Vukadinovic
- Department of Chemistry and Center for Sustainable Systems Design, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Michał Nowakowski
- Department of Chemistry and Center for Sustainable Systems Design, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Aleksandr Kalinko
- Department of Chemistry and Center for Sustainable Systems Design, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Julian Rudolph
- Institute of Physical and Theoretical Chemistry, Technische Universität Braunschweig, Gaußstraße 17, 38106 Braunschweig, Germany
| | - Per-Anders Carlsson
- Department of Chemistry and Chemical Engineering and Competence Centre for Catalysis, Chalmers University of Technology, 41296 Gothenburg, Sweden
| | - Christoph R Jacob
- Institute of Physical and Theoretical Chemistry, Technische Universität Braunschweig, Gaußstraße 17, 38106 Braunschweig, Germany
| | - Matthias Bauer
- Department of Chemistry and Center for Sustainable Systems Design, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| |
Collapse
|
9
|
Schoch A, Burkhardt L, Schoch R, Stührenberg K, Bauer M. Hard X-ray spectroscopy: an exhaustive toolbox for mechanistic studies (?). Faraday Discuss 2020; 220:113-132. [PMID: 31532420 DOI: 10.1039/c9fd00070d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Established and recent hard X-ray spectroscopic methods in the form of conventional X-ray absorption near edge structure spectroscopy (XANES) and extended X-ray absorption fine structure spectroscopy (EXAFS), and the photon-in/photon-out techniques high energy resolution fluorescence detection XANES and valence-to-core X-ray emission spectroscopy (VtC-XES) provide unique opportunities to study mechanisms in metal-organic reactions. The combination of these techniques allows the determination of the local geometric and electronic structures in the form of the numbers of nearest neighbours, their types and distances around an X-ray absorbing atom and the highest occupied and lowest unoccupied molecular levels. Different sample cells for this purpose, which allow high pressure, electrochemical or multi-spectroscopic measurements under inert conditions, are presented and discussed. The potential of HERFD-XANES and VtC-XES to eliminate limitations of conventional EXAFS spectroscopy is established with case studies on the Hieber anion [Fe(CO)3(NO)]- and the iron hydride complex [Fe(CO)H(NO)(PPh3)2]. With VtC-XES the formation of an allyl complex by reaction of [Fe(CO)3(NO)]- in a catalytic nucleophilic substitution reaction can be followed. Combination of HERFD-XANES and VtC-XES allows the identification and investigation of hydride species, as well as their fate in chemical reactions. On the other hand, in order to investigate the active species formation in iron-catalysed cross coupling reactions, conventional XANES and EXAFS are the method of choice for the moment. For all examples, the advantages and limitations of the hard X-ray toolbox are commented on and the value of the individual methods are compared.
Collapse
Affiliation(s)
- Anke Schoch
- Paderborn University, Department of Chemistry, Warburger Str. 100, 33098 Paderborn, Germany.
| | | | | | | | | |
Collapse
|