1
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Zheng Y, Wu X, Ru C, Zhao H, Han X, Wu J, Pan X. Synthesis, structure and reactivity of a boron-containing spirocycle carbanion. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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2
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Synthesis and molecular structure of half-sandwich ruthenium(II) complexes containing pyrazolyl ligands: Solvent induced geometrical change in κ2-scorpionate supported complex. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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Tretiakov S, Damen JAM, Lutz M, Moret ME. A dianionic C 3-symmetric scorpionate: synthesis and coordination chemistry. Dalton Trans 2020; 49:13549-13556. [PMID: 32941574 DOI: 10.1039/d0dt02601h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Introducing charges into ligand systems fine-tunes their electronic properties and influences the solubility of their metal complexes. Herein, we present a synthesis of a dianionic, C3-symmetric ligand combining three anionic N-donors tethered to a positively charged phosphonium center. The tris-skatylmethylphosphonium (TSMP) ligand, isolated in the form of its dipotassium salt TSMPK2, is the first dianionic homoscorpionate capable of metal exchange. The potassium cations in TSMPK2 are exchangeable for other metals, which results in rich coordination chemistry. Thus, the ligand displays a bridging μ2:κ2:κ1 coordination mode with trigonal planar Cu(i) centers in the tetrameric complex [(TSMP)Cu]44-. The κ3 mode is accessed upon addition of 1 equiv. of P(OEt)3 per Cu(i) to yield the tetrahedral monomeric complex [(TSMP)CuP(OEt)3]-. Both Fe(ii) and Ni(ii) in pyridine give octahedral high-spin κ3 complexes with composition (TSMP)M(Py)3 (M = Fe, Ni). Displacement of three pyridine ligands in (TSMP)Fe(Py)3 for a second equivalent of TSMP gives a high-spin pseudotetrahedral 2 : 1 complex [(TSMP)2Fe]2- with the ligands in κ2 coordination mode. The reduction in coordination number is likely due to electrostatic repulsion of the negatively-charged indolides as well as their weaker π-accepting character as compared to pyridine.
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Affiliation(s)
- Serhii Tretiakov
- Utrecht University, Organic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Faculty of Science, 3584 CG Utrecht, The Netherlands.
| | - Johannes A M Damen
- Utrecht University, Organic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Faculty of Science, 3584 CG Utrecht, The Netherlands.
| | - Martin Lutz
- Utrecht University, Crystal and Structural Chemistry, Bijvoet Centre for Biomolecular Research, Faculty of Science, 3584 CH Utrecht, The Netherlands
| | - Marc-Etienne Moret
- Utrecht University, Organic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Faculty of Science, 3584 CG Utrecht, The Netherlands.
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4
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Wagner HE, Hohnstein S, Schußmann MG, Steppe LA, Breher F. Phosphine-functionalised tris(pyrazolyl)methane ligands and their mono- and heterobimetallic complexes. Dalton Trans 2019; 48:15397-15407. [PMID: 31180415 DOI: 10.1039/c9dt02057h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis, characterisation and reactivity of new phosphine-functionalised tris(pyrazolyl)methane ligands (TpmPR2, 2a-c, with R = Ph, nBu, iPr) are presented. The reaction of 2a-c with [Rh(CO)2Cl]2 furnished N,P-heterochelate carbonyl complexes (3a-c), which were used to quantify the donor abilities of the ligands via IR spectroscopy. The coordination flexibility was demonstrated by treating representative members of this new ligand class with [CpRu(acn)3][PF6] (acn = acetonitrile), [(tht)AuCl] (tht = tetrahydrothiophene) and [Pd(allyl)Cl]2 providing either a N,N,P-heteroscorpionate complex (4) or the P-coordinated complexes (5,6) without any involvement of the pyrazolyl entities. With 2a and [Pd(cod)Cl2], another P,N-heterochelate complex (7) was obtained, which served as a precursor for a heterobimetallic complex containing palladium and copper (8). Detailed NMR spectroscopic and X-ray crystallographic investigations have been performed on all new complexes.
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Affiliation(s)
- Hanna E Wagner
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany.
| | - Silvia Hohnstein
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany.
| | - Max G Schußmann
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany.
| | - Lukas A Steppe
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany.
| | - Frank Breher
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany.
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5
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Fernández-Alvarez FJ, Polo V, García-Orduña P, Lahoz FJ, Pérez-Torrente JJ, Oro LA, Lalrempuia R. Synthesis and reactivity at the Ir- MeTpm platform: from κ 1-N coordination to κ 3-N-based organometallic chemistry. Dalton Trans 2019; 48:6455-6463. [PMID: 30924485 DOI: 10.1039/c9dt00703b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reaction of [Ir(μ-Cl)(COE)2]2 (COE = cis-cyclooctene) with tris(3,5-dimethylpyrazol-1-yl)methane (MeTpm) affords [IrCl(κ1-N-MeTpm)(COD)] (1) (COD = 1,5-cyclooctadiene). The formation of 1 implies the transfer dehydrogenation of a COE ligand to give COD and COA (cyclooctane). A mechanistic proposal based on DFT calculations that explains this iridium promoted process has been disclosed. Additionally, reactivity studies have allowed the preparation and characterization, including determination of the molecular structures of a number of iridium complexes with the MeTpm ligand in κ1, κ2 or κ3-N coordination modes. Moreover, the first example of an Ir-cyclooctyl complex featuring hydride and carbonyl ligands, whose solid state structure has been determined by X-ray diffraction methods, is reported.
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Affiliation(s)
- Francisco J Fernández-Alvarez
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, Facultad de Ciencias, 50009, Zaragoza, Spain
| | - Víctor Polo
- Departamento de Química Física-Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), Universidad de Zaragoza, Facultad de Ciencias, 50009, Zaragoza, Spain
| | - Pilar García-Orduña
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, Facultad de Ciencias, 50009, Zaragoza, Spain
| | - Fernando J Lahoz
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, Facultad de Ciencias, 50009, Zaragoza, Spain
| | - Jesús J Pérez-Torrente
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, Facultad de Ciencias, 50009, Zaragoza, Spain
| | - Luis A Oro
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, Facultad de Ciencias, 50009, Zaragoza, Spain
| | - Ralte Lalrempuia
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, Facultad de Ciencias, 50009, Zaragoza, Spain and School of Chemical Sciences, Dublin City University, Dublin 9, Ireland.
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6
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Garcés A, Sánchez-Barba LF, Fernández-Baeza J, Otero A, Lara-Sánchez A, Rodríguez AM. Studies on Multinuclear Magnesium tert-Butyl Heteroscorpionates: Synthesis, Coordination Ability, and Heteroselective Ring-Opening Polymerization of rac-Lactide. Organometallics 2017. [DOI: 10.1021/acs.organomet.6b00934] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrés Garcés
- Departamento
de Biología y Geología, Física y Química
Inorgánica, Universidad Rey Juan Carlos, Móstoles 28933 Madrid, Spain
| | - Luis F. Sánchez-Barba
- Departamento
de Biología y Geología, Física y Química
Inorgánica, Universidad Rey Juan Carlos, Móstoles 28933 Madrid, Spain
| | - Juan Fernández-Baeza
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica - Centro de
Innovación en Química Avanzada (ORFEO−CINQA), Campus Universitario, 13071 Ciudad Real, Spain
| | - Antonio Otero
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica - Centro de
Innovación en Química Avanzada (ORFEO−CINQA), Campus Universitario, 13071 Ciudad Real, Spain
| | - Agustín Lara-Sánchez
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica - Centro de
Innovación en Química Avanzada (ORFEO−CINQA), Campus Universitario, 13071 Ciudad Real, Spain
| | - Ana M. Rodríguez
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica - Centro de
Innovación en Química Avanzada (ORFEO−CINQA), Campus Universitario, 13071 Ciudad Real, Spain
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7
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Walz F, Moos E, Garnier D, Köppe R, Anson CE, Breher F. A Redox-Switchable Germylene and its Ligating Properties in Selected Transition Metal Complexes. Chemistry 2017; 23:1173-1186. [PMID: 27883244 DOI: 10.1002/chem.201605073] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Indexed: 12/22/2022]
Abstract
The synthesis, structure, and full characterization of a redox-switchable germylene based on a [3]ferrocenophane ligand arrangement, [Fc(NMes)2 Ge] (4), is presented. The mesityl (Mes)-substituted title compound is readily available from Fc(NHMes)2 (2) and Ge{N(SiMe3 )2 }2 , or from the dilithiated, highly air- and moisture-sensitive compound Fc(NLiMes)2 ⋅3 Et2 O (3) and GeCl2 . Cyclic voltammetry studies are provided for 4, confirming the above-mentioned view of a redox-switchable germylene metalloligand. Although several 1:1 RhI and IrI complexes of 4 (5-7) are cleanly formed in solution, all attempts to isolate them in pure form failed due to stability problems. However, crystalline solids of [Mo(κ1 Ge-4)2 (CO)4 ] (8) and [W(κ1 Ge-4)2 (CO)4 ] (9) were isolated and fully characterized by common spectroscopic techniques (8 by X-ray diffraction). DFT calculations were performed on a series of model compounds to elucidate a conceivable interplay between the metal atoms in neutral and cationic bimetallic complexes of the type [Rh(κ1 E-qE)(CO)2 Cl]0/+ (qE=[Fc(NPh)2 E] with E=C, Si, Ge). The bonding characteristics of the coordinated Fc-based metalloligands (qE/qE+ ) are strongly affected upon in silico oxidation of the calculated complexes. The calculated Tolman electronic parameter (TEP) significantly increases by approximately 20 cm-1 (E=C) to 25 cm-1 (E=Si, Ge) upon oxidation. The change in the ligand-donating abilities upon oxidation can mainly be attributed to Coulombic effects, whereas an orbital-based interaction appears to have only a minor influence.
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Affiliation(s)
- Florian Walz
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Eric Moos
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Delphine Garnier
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany.,Institute of Organic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Ralf Köppe
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Christopher E Anson
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Frank Breher
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
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8
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Feyrer A, Breher F. Palladium complexes of ferrocene-based phosphine ligands as redox-switchable catalysts in Buchwald–Hartwig cross-coupling reactions. Inorg Chem Front 2017. [DOI: 10.1039/c7qi00125h] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Redox-switchable catalysis: Palladium(ii) complexes of two differently substituted [1]phosphaferrocenophanes FcPR (R = Mes, biaryl) and of diphenylferrocenyl phosphine Ph2PFc were applied in redox-switchable Buchwald–Hartwig cross-coupling reactions.
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Affiliation(s)
- Alexander Feyrer
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology (KIT)
- 76131 Karlsruhe
- Germany
| | - Frank Breher
- Institute of Inorganic Chemistry
- Karlsruhe Institute of Technology (KIT)
- 76131 Karlsruhe
- Germany
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9
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Li H, Aquino AJA, Cordes DB, Hase WL, Krempner C. Electronic nature of zwitterionic alkali metal methanides, silanides and germanides - a combined experimental and computational approach. Chem Sci 2016; 8:1316-1328. [PMID: 28451273 PMCID: PMC5360169 DOI: 10.1039/c6sc02390h] [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: 05/31/2016] [Accepted: 10/06/2016] [Indexed: 11/24/2022] Open
Abstract
Zwitterionic group 14 complexes of the alkali metals of formula [E(SiMe2OCH2CH2OMe)3M], where E = C, Si or Ge and M = Li, Na or K, have been prepared, structurally characterized and their electronic nature was investigated by computational methods.
Zwitterionic group 14 complexes of the alkali metals of formula [C(SiMe2OCH2CH2OMe)3M], (M-1), [Si(SiMe2OCH2CH2OMe)3M], (M-2), [Ge(SiMe2OCH2CH2OMe)3M], (M-3), where M = Li, Na or K, have been prepared, structurally characterized and their electronic nature was investigated by computational methods. Zwitterions M-2 and M-3 were synthesized via reactions of [Si(SiMe2OCH2CH2OMe)4] (2) and [Ge(SiMe2OCH2CH2OMe)4] (3) with MOBut (M = Li, Na or K), resp., in almost quantitative yields, while M-1 were prepared from deprotonation of [HC(SiMe2OCH2CH2OMe)3] (1) with LiBut, NaCH2Ph and KCH2Ph, resp. X-ray crystallographic studies and DFT calculations in the gas-phase, including calculations of the NPA charges confirm the zwitterionic nature of these compounds, with the alkali metal cations being rigidly locked and charge separated from the anion by the internal OCH2CH2OMe donor groups. Natural bond orbital (NBO) analysis and the second order perturbation theory analysis of the NBOs reveal significant hyperconjugative interactions in M-1–M-3, primarily between the lone pair and the antibonding Si–O orbitals, the extent of which decreases in the order M-1 > M-2 > M-3. The experimental basicities and the calculated gas-phase basicities of M-1–M-3 reveal the zwitterionic alkali metal methanides M-1 to be significantly stronger bases than the analogous silanides M-2 and germanium M-3.
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Affiliation(s)
- H Li
- Texas Tech University , Department of Chemistry and Biochemistry , Box 41061 , Lubbock , Texas 79409-1061 , USA .
| | - A J A Aquino
- Texas Tech University , Department of Chemistry and Biochemistry , Box 41061 , Lubbock , Texas 79409-1061 , USA .
| | - D B Cordes
- Texas Tech University , Department of Chemistry and Biochemistry , Box 41061 , Lubbock , Texas 79409-1061 , USA .
| | - W L Hase
- Texas Tech University , Department of Chemistry and Biochemistry , Box 41061 , Lubbock , Texas 79409-1061 , USA .
| | - C Krempner
- Texas Tech University , Department of Chemistry and Biochemistry , Box 41061 , Lubbock , Texas 79409-1061 , USA .
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10
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Li T, Zhang G, Guo J, Wang S, Leng X, Chen Y. Tris(pyrazolyl)methanide Complexes of Trivalent Rare-Earth Metals. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00166] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Tengfei Li
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Guangchao Zhang
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Jingjing Guo
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Shaowu Wang
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Xuebing Leng
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Yaofeng Chen
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
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11
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Krieck S, Koch A, Hinze K, Müller C, Lange J, Görls H, Westerhausen M. s-Block Metal Complexes with Bis- and Tris(pyrazolyl)methane and -methanide Ligands. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501263] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Sven Krieck
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstrasse 8 07743 Jena Germany
| | - Alexander Koch
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstrasse 8 07743 Jena Germany
| | - Kay Hinze
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstrasse 8 07743 Jena Germany
| | - Christoph Müller
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstrasse 8 07743 Jena Germany
| | - Juliane Lange
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstrasse 8 07743 Jena Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstrasse 8 07743 Jena Germany
| | - Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry; Friedrich Schiller University Jena; Humboldtstrasse 8 07743 Jena Germany
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12
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Schmieder P, Denysenko D, Grzywa M, Magdysyuk O, Volkmer D. A structurally flexible triazolate-based metal–organic framework featuring coordinatively unsaturated copper(i) sites. Dalton Trans 2016; 45:13853-62. [DOI: 10.1039/c6dt02672a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A novel CuI-bistriazolate MOF showing reversible breathing behaviour is able to form a weak complex with carbon monoxide.
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Affiliation(s)
- P. Schmieder
- Augsburg University
- Institute of Physics
- Chair of Solid State and Materials Chemistry
- 86159 Augsburg
- Germany
| | - D. Denysenko
- Augsburg University
- Institute of Physics
- Chair of Solid State and Materials Chemistry
- 86159 Augsburg
- Germany
| | - M. Grzywa
- Augsburg University
- Institute of Physics
- Chair of Solid State and Materials Chemistry
- 86159 Augsburg
- Germany
| | - O. Magdysyuk
- Diamond Light Source Ltd
- Harwell Science and Innovation Campus
- Oxfordshire
- UK
| | - D. Volkmer
- Augsburg University
- Institute of Physics
- Chair of Solid State and Materials Chemistry
- 86159 Augsburg
- Germany
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13
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Müller C, Krieck S, Görls H, Westerhausen M. Concept for Enhancement of the Stability of Calcium-Bound Pyrazolyl-Substituted Methanides. Inorg Chem 2015; 54:2100-2. [DOI: 10.1021/acs.inorgchem.5b00064] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christoph Müller
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University, Humboldtstrasse 8, D-07743 Jena, Germany
| | - Sven Krieck
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University, Humboldtstrasse 8, D-07743 Jena, Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University, Humboldtstrasse 8, D-07743 Jena, Germany
| | - Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University, Humboldtstrasse 8, D-07743 Jena, Germany
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14
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Meyer J, González-Gallardo S, Hohnstein S, Garnier D, Armbruster MK, Fink K, Klopper W, Breher F. Tris(3,5-dimethylpyrazolyl)methane-Based Heterobimetallic Complexes that Contain Zn and CdTransition-Metal Bonds: Synthesis, Structures, and Quantum Chemical Calculations. Chemistry 2014; 21:2905-14. [DOI: 10.1002/chem.201405397] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 11/10/2014] [Indexed: 11/10/2022]
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15
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Trapp I, González-Gallardo S, Hohnstein S, Garnier D, Oña-Burgos P, Breher F. A metallacyclic alkyl-amido carbene complex (MCAAC). Dalton Trans 2014; 43:4313-9. [PMID: 24549226 DOI: 10.1039/c3dt52591k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The activation of the C≡N moiety in the redox-active metalloligand [CpRu{κ(3)N(pz)-1}][PF6] (2) (1: ambidentate hybrid ligand, N≡C-C(pz)3, with pz = pyrazolyl) was observed in the reaction with [Ir(cod)Cl]2 (cod = 1,5-cyclooctadiene). By performing detailed NMR spectroscopic and X-ray crystallographic investigations the product was found to be a bimetallic Ru(II)-Ir(III) complex of the composition [CpRu{μ-1}Ir(cod)Cl2][PF6] (3) consisting of a chemically modified ligand 1'. Most notably, the heterobimetallic complex 3 features an unprecedented metallacyclic alkyl-amido carbene (MCAAC) core structure, which is coordinated to an Ir(III) centre. Density functional theory (DFT) calculations as well as cyclic voltammetry (CV) studies were performed in an effort to establish the formal oxidation states of the metal atoms in 3. Indeed, a quasi-reversible oxidation wave was detected at E(1/2)(0) = 0.36 V, which was attributed to the Ru(II)/Ru(III) redox couple, while two irreversible reduction processes were observed at very negative potentials and have been assigned to the stepwise reduction of Ir(III) to Ir(I). First efforts to elucidate the reaction mechanism have also been performed.
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Affiliation(s)
- Ina Trapp
- Karlsruhe Institute of Technology (KIT), Institute of Inorganic Chemistry, Engesserstr. 15, D-76131 Karlsruhe, Germany.
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16
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González-Gallardo S, Kuzu I, Oña-Burgos P, Wolfer T, Wang C, Klinkhammer KW, Klopper W, Bräse S, Breher F. Coinage Metal Complexes of Tris(pyrazolyl)methanide-Based Redox-Active Metalloligands. Organometallics 2014. [DOI: 10.1021/om4010498] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sandra González-Gallardo
- Institute
of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Istemi Kuzu
- Institute
of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Pascual Oña-Burgos
- Institute
of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Tanja Wolfer
- Institute
of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Cong Wang
- Institute
of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Karl W. Klinkhammer
- Institute
of Inorganic Chemistry and Analytical Chemistry, J. Gutenberg University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Wim Klopper
- Institute
of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Stefan Bräse
- Institute
of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
| | - Frank Breher
- Institute
of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
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17
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Armbruster F, Augenstein T, Oña-Burgos P, Breher F. Homoleptic Tetrakis(silyl) Complexes of Pd0and Pt0Featuring Metal-Centred Heterocubane Structures: Evidence for the Existence of the Corresponding Mononuclear PdIand PtIComplexes. Chemistry 2013; 19:17899-906. [DOI: 10.1002/chem.201303299] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Indexed: 11/10/2022]
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18
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Müller C, Görls H, Krieck S, Westerhausen M. Tris(3‐phenylpyrazolyl)methanide Complex of Calcium – Unprecedented Coordination Chemistry and Degradation Reaction. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201301214] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Christoph Müller
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University, Humboldtstrasse 8, 07743 Jena, Germany, http://www.lsac1.uni‐jena.de
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University, Humboldtstrasse 8, 07743 Jena, Germany, http://www.lsac1.uni‐jena.de
| | - Sven Krieck
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University, Humboldtstrasse 8, 07743 Jena, Germany, http://www.lsac1.uni‐jena.de
| | - Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University, Humboldtstrasse 8, 07743 Jena, Germany, http://www.lsac1.uni‐jena.de
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19
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Garcés A, Sánchez-Barba LF, Fernández-Baeza J, Otero A, Honrado M, Lara-Sánchez A, Rodríguez AM. Heteroscorpionate Magnesium Alkyls Bearing Unprecedented Apical σ-C(sp3)–Mg Bonds: Heteroselective Ring-Opening Polymerization of rac-Lactide. Inorg Chem 2013; 52:12691-701. [DOI: 10.1021/ic401915b] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Andrés Garcés
- Departamento de Química Inorgánica
y Analítica, Universidad Rey Juan Carlos, Móstoles-28933-Madrid, Spain
| | - Luis F. Sánchez-Barba
- Departamento de Química Inorgánica
y Analítica, Universidad Rey Juan Carlos, Móstoles-28933-Madrid, Spain
| | - Juan Fernández-Baeza
- Departamento de Química Inorgánica, Orgánica
y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071-Ciudad Real, Spain
| | - Antonio Otero
- Departamento de Química Inorgánica, Orgánica
y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071-Ciudad Real, Spain
| | - Manuel Honrado
- Departamento de Química Inorgánica, Orgánica
y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071-Ciudad Real, Spain
| | - Agustín Lara-Sánchez
- Departamento de Química Inorgánica, Orgánica
y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071-Ciudad Real, Spain
| | - Ana M. Rodríguez
- Departamento de Química Inorgánica, Orgánica
y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071-Ciudad Real, Spain
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20
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Styra S, González-Gallardo S, Armbruster F, Oña-Burgos P, Moos E, Vonderach M, Weis P, Hampe O, Grün A, Schmitt Y, Gerhards M, Menges F, Gaffga M, Niedner-Schatteburg G, Breher F. Heterobimetallic Cuprates Consisting of a Redox-Switchable, Silicon-Based Metalloligand: Synthesis, Structures, and Electronic Properties. Chemistry 2013; 19:8436-46. [PMID: 23737399 DOI: 10.1002/chem.201300586] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Steffen Styra
- Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
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21
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Zeckert K. Pyridyl Compounds of Heavier Group 13 and 14 Elements as Ligands for Lanthanide Metals. Organometallics 2013. [DOI: 10.1021/om301032x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Kornelia Zeckert
- Institut für
Anorganische Chemie, Universität Leipzig, Johannisallee 29, D-04103, Leipzig, Germany
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22
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Meyer J, Kuzu I, González-Gallardo S, Breher F. Investigations on the Steric Accessibility of the Carbanionic Moiety in Zwitterionic Magnesium Tris(pyrazolyl)methanide Complexes. Synthesis and Characterisation of Bi- and Trimetallic Complexes. Z Anorg Allg Chem 2012. [DOI: 10.1002/zaac.201200405] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Casimiro M, Oña-Burgos P, Meyer J, Styra S, Kuzu I, Breher F, Fernández I. On the Solution Behaviour of Benzyllithium⋅(−)-Sparteine Adducts and Related Lithium Organyls - A Case Study on Applying7Li,15N{1H} HMQC and Further NMR Methods, Including Some Investigation into Asymmetric Synthesis. Chemistry 2012. [DOI: 10.1002/chem.201202346] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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24
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Li HY, Xu ZL, Li HX, Zhang Y, Dai LX, Lang JP. Syntheses, crystal structures, and luminescence of coordination polymers [Cu(μ-Br)(μ-phpzm)] n , [{Cu(μ-SCN)}2(μ-phpzm)] n , and [(phpzm)Cu(μ-CN)] n (phpzm = bis(4-phenylpyrazol-1-yl)methane). J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.737915] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Hai-Yan Li
- a Key Laboratory of Organic Synthesis of Jiangsu Province , College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123 , Jiangsu , China
- b State Key Laboratory of Coordination Chemistry , Nanjing University , Nanjing 210093 , Jiangsu , China
| | - Zhong-Lin Xu
- a Key Laboratory of Organic Synthesis of Jiangsu Province , College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123 , Jiangsu , China
| | - Hong-Xi Li
- a Key Laboratory of Organic Synthesis of Jiangsu Province , College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123 , Jiangsu , China
| | - Yong Zhang
- a Key Laboratory of Organic Synthesis of Jiangsu Province , College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123 , Jiangsu , China
| | - Li-Xing Dai
- a Key Laboratory of Organic Synthesis of Jiangsu Province , College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123 , Jiangsu , China
| | - Jian-Ping Lang
- a Key Laboratory of Organic Synthesis of Jiangsu Province , College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123 , Jiangsu , China
- b State Key Laboratory of Coordination Chemistry , Nanjing University , Nanjing 210093 , Jiangsu , China
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25
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Tazelaar CGJ, Lyaskovskyy V, Dijk TV, Broere DLJ, Kolfschoten LA, Khiar ROH, Lutz M, Slootweg JC, Lammertsma K. Tris(pyrazolyl)phosphine Oxides. Synthesis and Coordination Chemistry with Copper(I). Organometallics 2012. [DOI: 10.1021/om300051f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cornelis G. J. Tazelaar
- Department
of Chemistry and Pharmaceutical Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV
Amsterdam, The Netherlands
| | - Volodymyr Lyaskovskyy
- Department
of Chemistry and Pharmaceutical Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV
Amsterdam, The Netherlands
| | - Tom van Dijk
- Department
of Chemistry and Pharmaceutical Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV
Amsterdam, The Netherlands
| | - Daniël L. J. Broere
- Department
of Chemistry and Pharmaceutical Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV
Amsterdam, The Netherlands
| | - Ludo A. Kolfschoten
- Department
of Chemistry and Pharmaceutical Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV
Amsterdam, The Netherlands
| | - Rima Osman Hassan Khiar
- Department
of Chemistry and Pharmaceutical Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV
Amsterdam, The Netherlands
| | - Martin Lutz
- Bijvoet Center for Biomolecular
Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - J. Chris Slootweg
- Department
of Chemistry and Pharmaceutical Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV
Amsterdam, The Netherlands
| | - Koop Lammertsma
- Department
of Chemistry and Pharmaceutical Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV
Amsterdam, The Netherlands
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26
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Trapp I, Löble M, Meyer J, Breher F. Copper complexes of tripodal κ6N-donor ligands: A structural, EPR spectroscopic and electrochemical study. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.02.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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27
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Li HY, Zhang Y, Ding YC, Wang M, Dai LX, Lang JP. Syntheses, crystal structures and luminescent properties of four one-dimensional coordination polymers [Cu(μ-X)(brdmpzm)]n (X=Cl, Br, I, CN; brdmpzm=bis(4-bromo-3,5-dimethylpyrazol-1-yl)methane). J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.04.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Nickl C, Eichele K, Joosten D, Langer T, Schappacher FM, Pöttgen R, Englert U, Wesemann L. 1,1,1-Tris(distanna-closo-dodecaborat)stannat - ein tripodaler Zinnligand. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201100936] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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29
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Nickl C, Eichele K, Joosten D, Langer T, Schappacher FM, Pöttgen R, Englert U, Wesemann L. 1,1,1-Tris(distanna-closo-dodecaborate)stannate: A Tripodal Tin Ligand. Angew Chem Int Ed Engl 2011; 50:5766-9. [DOI: 10.1002/anie.201100936] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Indexed: 11/07/2022]
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30
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Kratzert D, Leusser D, Stern D, Meyer J, Breher F, Stalke D. Experimental charge density distribution of non-coordinating sp3 carbanions in [Mg{(pz*)3C}2]. Chem Commun (Camb) 2011; 47:2931-3. [DOI: 10.1039/c0cc04688d] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Armbruster F, Meyer J, Baldes A, Burgos PO, Fernández I, Breher F. A triangulopalladium cluster consisting of μ3-capping silyl ligands. Chem Commun (Camb) 2011; 47:221-3. [DOI: 10.1039/c002435j] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Benisvy L, Wanke R, Kuznetsov ML, Guedes da Silva MFC, Pombeiro AJ. Towards the functionalization of the methine carbon of a sterically hindered tris(pyrazolyl)methane: is a radical pathway envisageable? Synthesis and structure of tetrakis(3,5-dimethylpyrazolyl)methane. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.09.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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33
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Pawlikowski AV, Gray TS, Schoendorff G, Baird B, Ellern A, Windus TL, Sadow AD. Structure, bonding, and ligand-based reactions of zwitterionic boratoiridium(I) complexes with oxazolinyl scorpionate ligands. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.06.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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34
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Kuzu I, Krummenacher I, Hewitt I, Lan Y, Mereacre V, Powell AK, Höfer P, Harmer J, Breher F. Syntheses, Structures and Electronic Properties of Zwitterionic Iron(II) and Cobalt(II) Complexes Featuring Ambidentate Tris(pyrazolyl)methanide Ligands. Chemistry 2009; 15:4350-65. [DOI: 10.1002/chem.200802317] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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Krahulic KE, Tuononen HM, Parvez M, Roesler R. Isolation of Free Phenylide-like Carbanions with N-Heterocyclic Carbene Frameworks. J Am Chem Soc 2009; 131:5858-65. [DOI: 10.1021/ja9001234] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kelly E. Krahulic
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4 Canada, and Department of Chemistry, University of Jyväskylä, P.O. Box 35, FIN-40014 Jyväskylä, Finland
| | - Heikki M. Tuononen
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4 Canada, and Department of Chemistry, University of Jyväskylä, P.O. Box 35, FIN-40014 Jyväskylä, Finland
| | - Masood Parvez
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4 Canada, and Department of Chemistry, University of Jyväskylä, P.O. Box 35, FIN-40014 Jyväskylä, Finland
| | - Roland Roesler
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4 Canada, and Department of Chemistry, University of Jyväskylä, P.O. Box 35, FIN-40014 Jyväskylä, Finland
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36
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Synthesis, Crystal Structures and Redox Properties of Mixed‐Sandwich Complexes of Ruthenium(II) with Cyclopentadienyl and Tris(pyrazolyl)methane Ligands. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200801112] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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37
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Fernández I, Oña-Burgos P, Armbruster F, Krummenacher I, Breher F. 7Li,15N heteronuclear multiple quantum shift correlation—a fast and reliable 2D NMR method on natural abundant nuclei. Chem Commun (Camb) 2009:2586-8. [PMID: 19532898 DOI: 10.1039/b902053e] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Armbruster F, Fernández I, Breher F. Syntheses, structures, and reactivity of poly(pyrazolyl)silanes, -disilanes, and the ambidentate κ1Si/κ3N-coordinating tris(3,5-dimethylpyrazolyl)silanide ligand [Si(3,5-Me2pz)3]− (MeTpsd). Dalton Trans 2009:5612-26. [DOI: 10.1039/b906333a] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Schofield AD, Barros ML, Cushion MG, Schwarz AD, Mountford P. Sodium, magnesium and zinc complexes of mono(phenolate) heteroscorpionate ligands. Dalton Trans 2008:85-96. [PMID: 19081975 DOI: 10.1039/b813116c] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of bis(3,5-dimethylpyrazolyl)methylphenol N(2)O(Ar)H (1) with NaH in THF formed dimeric [Na(kappa(2)-N(2)O(Ar))(THF)](2) (2), which contains a kappa(2)(N,O)-bound bidentate N(2)O(Ar) ligand. The reaction of 1 with Mg(n)Bu(2) gave the four-coordinate monomeric butyl compound Mg(N(2)O(Ar))(n)Bu (3), whereas with (n)BuMgCl, a mixture of products was formed, including the six-coordinate homoleptic species Mg(N(2)O(Ar))(2) (4). The reaction of [Na(kappa(2)-N(2)O(Ar))(THF)](2) with (n)BuMgCl also gave 3, as did the redistribution reaction of Mg(n)Bu(2) with 4. The reaction of 1 with Mg{N(SiRMe(2))(2)}(2) afforded the four-coordinate amide derivatives Mg(N(2)O(Ar)){N(SiRMe(2))(2)} (R = Me (6) or H (7)), together with 4. The reactions of 1 with ZnMe(2) or Zn{N(SiMe(3))(2)}(2) gave the monomeric compounds Zn(N(2)O(Ar))Me (8) and Zn(N(2)O(Ar)){N(SiMe(3))(2)} (9), respectively. The reaction 9 of with HCl formed Zn(N(2)O(Ar))Cl (11), and subsequent addition of LiN(SiHMe(2))(2) to 11 led to Zn(N(2)O(Ar)){N(SiHMe(2))(2)} (12). The reaction of 1 with either Zn{N(SiMe(3))(2)}(2) or 9 gave Zn(N(2)O(Ar))(2). The compounds 2, 3, 4, 6, 8, 9 and 11 were crystallographically characterized. Compound was very active for the ring-opening polymerization (ROP) of epsilon-caprolactone (epsilon-CL) but the process was very poorly controlled as judged by the M(n) and polydispersity index of the polymer. Compounds 3, 8, 9 and 12 gave poor conversions to poly(epsilon-CL) over extended periods. N(2)O(Ar)H = 2,4-di-tert-butyl-6-(bis(3,5-dimethylpyrazolyl)methyl)phenol.
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Affiliation(s)
- A Daniel Schofield
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, UKOX1 3TA
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40
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Bigmore H, Meyer J, Krummenacher I, Rüegger H, Clot E, Mountford P, Breher F. Syntheses, Reactivity and DFT Studies of Group 2 and Group 12 Metal Complexes of Tris(pyrazolyl)methanides Featuring “Free” Pyramidal Carbanions. Chemistry 2008; 14:5918-34. [DOI: 10.1002/chem.200800181] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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41
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Chandrasekhar V, Azhakar R, Pandian BM, Bickley JF, Steiner A. A Tunable Coordination Response of the Phosphorus-Based Hexadentate Ligand (S)P[N(Me)N=CHC6H4-o-OH]3 (LH3): Synthesis and Structure of LM (M = Sc, Cr, Mn, Fe, Co, Ga). Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200700961] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Chandrasekhar V, Azhakar R, Pandian BM, Boomishankar R, Steiner A. A phosphorus-supported multisite coordination ligand containing three imidazolyl arms and its metalation behaviour. An unprecedented co-existence of mononuclear and macrocyclic dinuclear Zn(ii) complexes in the same unit cell of a crystalline lattice. Dalton Trans 2008:5962-9. [DOI: 10.1039/b807074a] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kuzu I, Krummenacher I, Meyer J, Armbruster F, Breher F. Multidentate ligand systems featuring dual functionality. Dalton Trans 2008:5836-65. [DOI: 10.1039/b808347a] [Citation(s) in RCA: 201] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chandrasekhar V, Thilagar P, Murugesa Pandian B. Cyclophosphazene-based multi-site coordination ligands. Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2006.07.005] [Citation(s) in RCA: 129] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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