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Cemortan V, Simler T, Moutet J, Jaoul A, Clavaguéra C, Nocton G. Structure and bonding patterns in heterometallic organometallics with linear Ln-Pd-Ln motifs. Chem Sci 2023; 14:2676-2685. [PMID: 36908951 PMCID: PMC9993901 DOI: 10.1039/d2sc06933d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 01/20/2023] [Indexed: 01/22/2023] Open
Abstract
Complexes with short intermetallic distances between transition metal fragments and lanthanide (Ln) fragments are fascinating objects of study, owing to the ambiguity of the nature of the interaction. The addition of the divalent lanthanide fragments Cp*2Ln(OEt2) (Ln = Sm or Yb) to a Pd(ii) complex bearing the deprotonated form of the redox-active, non-symmetrical ligand, 2-pyrimidin-2-yl-1H-benzimidazole (Hbimpm), leads to two isostructural complexes, of the general formula (Cp*2Ln)2[μ-Pd(pyridyl)2] (Ln = Sm (4) and Yb (5)). These adducts have interesting features, such as unique linear Ln-Pd-Ln arrangements and short Ln-Pd distances, which deviate from the expected lanthanide contraction. A mixed computational and spectroscopic study into the formation of these adducts gathers important clues as to their formation. At the same time, thorough characterization of these complexes establishes the +3 oxidation state of all the involved Ln centers. Detailed theoretical computations demonstrate that the apparent deviation from lanthanide contraction is not due to any difference in the intermetallic interaction between the Pd and the Ln, but that the fragments are joined together by electrostatic interactions and dispersive forces. This conclusion contrasts with the findings about a third complex, Cp*2Yb(μ-Me)2PdCp* (6), formed during the reaction, which also possesses a short Yb-Pd distance. Studies at the CASSCF level of theory on this complex show several orbitals containing significant interactions between the 4f and 4d manifolds of the metals. This demonstrates the need for methodical and careful analyses in gauging the intermetallic interaction and the inadequacy of empirical metrics in describing such phenomena.
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Affiliation(s)
- Valeriu Cemortan
- LCM, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris Route de Saclay Palaiseau 91120 France .,Université Paris-Saclay, CNRS, Institut de Chimie Physique UMR8000 Orsay 91405 France
| | - Thomas Simler
- LCM, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris Route de Saclay Palaiseau 91120 France
| | - Jules Moutet
- LCM, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris Route de Saclay Palaiseau 91120 France
| | - Arnaud Jaoul
- LCM, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris Route de Saclay Palaiseau 91120 France
| | - Carine Clavaguéra
- Université Paris-Saclay, CNRS, Institut de Chimie Physique UMR8000 Orsay 91405 France
| | - Grégory Nocton
- LCM, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris Route de Saclay Palaiseau 91120 France
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Lanthanides and actinides: Annual survey of their organometallic chemistry covering the year 2019. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213830] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Wang D, Tricoire M, Cemortan V, Moutet J, Nocton G. Redox activity of a dissymmetric ligand bridging divalent ytter-bium and reactive nickel fragments. Inorg Chem Front 2021; 8:647-657. [PMID: 33575034 PMCID: PMC7116723 DOI: 10.1039/d0qi00952k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of a reactive nickel dimethyl 1 bearing a redox-active, dissymmetric ligand, which is obtained by deprotonation of 2-pyrimidin-2-yl-1H-benzimidazole (Hbimpm) with a divalent lanthanide complex, Cp*2Yb(OEt2), affords an unprecedented, trimeric 2 with C(sp3)-C(sp3) bond formation between two ligands in an exo position. Meanwhile, the transient, dimeric species 3 can be isolated with the same ligand coupling fashion, however, with a drastic distorsion angle of the bimpm ligand and reactive NiMe2 fragment, revealing the possible mechanism of this rearrangement. A much more stable dimeric congener, 5, with an exo ligand coupling, is synthesized in the presence of 18-crown-6, which captures the potassium counter ion. The C-C coupling formation between two bimpm ligands results from the effective electron transfer from divalent lanthanide fragments. Without the divalent lanthanide, the reductive coupling occurs on a different carbon of the ligand, nicely showing the modulation of the spin density induced by the presence of the lanthanide ion. The electronic structures of these complexes are investigated by magnetic study (SQUID), indicating a 2F7/2 ground state for each ytterbium in all the heterometallics. This work firstly reports ligand coupling reactivity in a redox-active, yet dissymmetric system with divalent organolanthanides, and the reactive nickel moiety can impact the intriguing transition towards a stable homoleptic, trinulear lanthanide species.
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Affiliation(s)
- Ding Wang
- LCM, CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau, France
| | - Maxime Tricoire
- LCM, CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau, France
| | - Valeriu Cemortan
- LCM, CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau, France
| | - Jules Moutet
- LCM, CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau, France
| | - Grégory Nocton
- LCM, CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau, France
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Moutet J, Schleinitz J, La Droitte L, Tricoire M, Pointillart F, Gendron F, Simler T, Clavaguéra C, Le Guennic B, Cador O, Nocton G. Bis‐Cyclooctatetraenyl Thulium(II): Highly Reducing Lanthanide Sandwich Single‐Molecule Magnets. Angew Chem Int Ed Engl 2021; 60:6042-6046. [DOI: 10.1002/anie.202015428] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Jules Moutet
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Jules Schleinitz
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Léo La Droitte
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Maxime Tricoire
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Fabrice Pointillart
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Frédéric Gendron
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Thomas Simler
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Carine Clavaguéra
- Université Paris-Saclay CNRS Institut de Chimie Physique UMR 8000 91405 Orsay cedex France
| | - Boris Le Guennic
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Olivier Cador
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Grégory Nocton
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
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Moutet J, Schleinitz J, La Droitte L, Tricoire M, Pointillart F, Gendron F, Simler T, Clavaguéra C, Le Guennic B, Cador O, Nocton G. Bis‐Cyclooctatetraenyl Thulium(II): Highly Reducing Lanthanide Sandwich Single‐Molecule Magnets. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015428] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jules Moutet
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Jules Schleinitz
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Léo La Droitte
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Maxime Tricoire
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Fabrice Pointillart
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Frédéric Gendron
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Thomas Simler
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Carine Clavaguéra
- Université Paris-Saclay CNRS Institut de Chimie Physique UMR 8000 91405 Orsay cedex France
| | - Boris Le Guennic
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Olivier Cador
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Grégory Nocton
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
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Boyce SAJ, Moutet J, Niederegger L, Simler T, Nocton G, Hess CR. Influence of a Lanthanide Ion on the Ni Site of a Heterobimetallic 3d-4f Mabiq Complex. Inorg Chem 2021; 60:403-411. [PMID: 33319984 DOI: 10.1021/acs.inorgchem.0c03058] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This work presents the synthesis and characterization of a 3d-4f bimetallic complex based on the redox-active macrocyclic biquinazoline ligand, Mabiq. The mixed Yb-Ni complex, [(Cp*)2Yb(Mabiq)Ni]BArF (3), was synthesized upon reaction of [NiII(Mabiq)]BArF (2) with (Cp*)2YbII(OEt2). The molecular structures of 3 and its sister complex, [(Cp*)2Yb(Mabiq)Ni][(Cp*)2Yb(OTf)2] (1), confirmed the presence of a Yb(III) center and a reduced Ni-Mabiq unit. Spectroscopy (absorption and NMR), cyclic voltammetry, and magnetic susceptibility studies were employed to analyze the electronic structure of 3, which is best described by the [(Cp*)2YbIII(Mabiq•)NiII]+ formulation. Notably, the ligand-centered radical is delocalized over both the diketiminate and bipyrimidine units of the Mabiq ligand. The magnetic susceptibility and variable temperature NMR studies for 3 denote coupling between the Ni-Mabiq site and the peripheral Yb center-previously unobserved in 3d-3d Mabiq complexes. The complex nature of the exchange interactions is highlighted by the multiconfigurational ground state for 3, comprising nearly degenerate singlet and triplet states.
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Affiliation(s)
- Stuart A J Boyce
- Department of Chemistry and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany.,School of Chemistry, The University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Jules Moutet
- LCM, CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Cedex Palaiseau, France
| | - Lukas Niederegger
- Department of Chemistry and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Thomas Simler
- LCM, CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Cedex Palaiseau, France
| | - Grégory Nocton
- LCM, CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Cedex Palaiseau, France
| | - Corinna R Hess
- Department of Chemistry and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
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