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He X, Pan X, Xiong C, Zhang Y, Hong D, Fang H, Cui P. Rare-Earth Metalloligands for Low -Valent Cobalt Complexes: Fine Electronic Tuning via Co→RE Dative Interactions. Inorg Chem 2024; 63:8155-8162. [PMID: 38651290 DOI: 10.1021/acs.inorgchem.4c00367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Rare-earth metalloligand supported low-valent cobalt complexes were synthesized by utilizing a small-sized heptadentate phosphinomethylamine LsNH3 and a large-sized arene-anchored hexadentate phosphinomethylamine LlArH3 ligand precursors. The RE(III)-Co(-I)-N2 (RE = Sc, Lu, Y, Gd, La) complexes containing rare-earth metals including the smallest Sc and largest La were characterized by multinuclear NMR spectroscopy, X-ray diffraction analysis, electrochemistry, and computational studies. The Co(-I)→RE(III) dative interactions were all polarized with major contributions from the 3dz2 orbital of the cobalt center, which was slightly affected by the identity of rare-earth metalloligands. The IR spectroscopic data and redox potentials obtained from cyclic voltammetry revealed that the electronic property of the Co(-I) center was finely tuned by the rare-earth metalloligand, which was revealed by variation of the ligand systems containing LsN, LmN, and LlAr. Unlike the direct alteration of the electronic property of metal center via an ancillary ligand, such a series of rare-earth metalloligand represents a smooth strategy to tune the electronic property of transition metals.
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Affiliation(s)
- Xiuyan He
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, 189 S. Jiuhua Road, Wuhu, Anhui 241002, P. R. China
| | - Xiaowei Pan
- School of Materials Science and Engineering, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, No. 38 Tongyan Road, Haihe Education Park, Tianjin 300350, P. R. China
| | - Chunyan Xiong
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, 189 S. Jiuhua Road, Wuhu, Anhui 241002, P. R. China
| | - Yun Zhang
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, 189 S. Jiuhua Road, Wuhu, Anhui 241002, P. R. China
| | - Dongjing Hong
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, 189 S. Jiuhua Road, Wuhu, Anhui 241002, P. R. China
| | - Huayi Fang
- School of Materials Science and Engineering, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, No. 38 Tongyan Road, Haihe Education Park, Tianjin 300350, P. R. China
| | - Peng Cui
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, 189 S. Jiuhua Road, Wuhu, Anhui 241002, P. R. China
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Govindarajan R, Deolka S, Khusnutdinova JR. Heterometallic bond activation enabled by unsymmetrical ligand scaffolds: bridging the opposites. Chem Sci 2022; 13:14008-14031. [PMID: 36540828 PMCID: PMC9728565 DOI: 10.1039/d2sc04263k] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 10/27/2022] [Indexed: 08/19/2023] Open
Abstract
Heterobi- and multimetallic complexes providing close proximity between several metal centers serve as active species in artificial and enzymatic catalysis, and in model systems, showing unique modes of metal-metal cooperative bond activation. Through the rational design of well-defined, unsymmetrical ligand scaffolds, we create a convenient approach to support the assembly of heterometallic species in a well-defined and site-specific manner, preventing them from scrambling and dissociation. In this perspective, we will outline general strategies for the design of unsymmetrical ligands to support heterobi- and multimetallic complexes that show reactivity in various types of heterometallic cooperative bond activation.
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Affiliation(s)
- R Govindarajan
- Coordination Chemistry and Catalysis Unit, Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha, Onna-son 904-0495 Okinawa Japan
| | - Shubham Deolka
- Coordination Chemistry and Catalysis Unit, Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha, Onna-son 904-0495 Okinawa Japan
| | - Julia R Khusnutdinova
- Coordination Chemistry and Catalysis Unit, Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha, Onna-son 904-0495 Okinawa Japan
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3
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Isaac CJ, Miloserdov FM, Pécharman AF, Lowe JP, McMullin CL, Whittlesey MK. Structure and Reactivity of [Ru–Al] and [Ru–Sn] Heterobimetallic PPh 3-Based Complexes. Organometallics 2022; 41:2716-2730. [PMID: 36249448 PMCID: PMC9554919 DOI: 10.1021/acs.organomet.2c00344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Indexed: 11/30/2022]
Abstract
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Treatment of [Ru(PPh3)(C6H4PPh2)2H][Li(THF)2] with AlMe2Cl and SnMe3Cl leads to elimination of LiCl and
CH4 and formation of the heterobimetallic complexes [Ru(C6H4PPh2)2{PPh2C6H4AlMe(THF)}H] 5 and [Ru(PPh3)(C6H4PPh2)(PPh2C6H4SnMe2)] 6, respectively.
The pathways to 5 and 6 have been probed
by variable temperature NMR studies, together with input from DFT
calculations. Complete reaction of H2 occurs with 5 at 60 °C and with 6 at room temperature
to yield the spectroscopically characterized trihydride complexes
[Ru(PPh2)2{PPh2C6H4AlMe}H3] 7 and [Ru(PPh2)2{PPh2C6H4SnMe2}H3] 8. In the presence of CO, 6 forms the acylated phosphine complex, [Ru(CO)2(C(O)C6H4PPh2)(PPh2C6H4SnMe2)] 9, through a series
of intermediates that were identified by NMR spectroscopy in conjunction
with 13CO labeling. Complex 6 undergoes addition
and substitution reactions with the N-heterocyclic carbene 1,3,4,5-tetramethylimidazol-2-ylidene
(IMe4) to give [Ru(IMe4)2(PPh2C6H4)(PPh2C6H4SnMe2)] 10, which converted via rare
N-Me group C–H activation to [Ru(IMe4)(PPh3)(IMe4)′(PPh2C6H4SnMe2)] 11 upon heating at 60 °C and
to a mixture of [Ru(IMe4)2(IMe4)′(PPh2C6H4SnMe2)] 12 and [Ru(PPh3)(PPh2C6H4)(IMe4-SnMe2)′] 13 at 120
°C.
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Affiliation(s)
- Connie J. Isaac
- Department of Chemistry, University of Bath, Bath BA2 7AY, U.K
| | | | | | - John P. Lowe
- Department of Chemistry, University of Bath, Bath BA2 7AY, U.K
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Golwankar RR, Kumar A, Day VW, Blakemore JD. Revealing the Influence of Diverse Secondary Metal Cations on Redox‐Active Palladium Complexes. Chemistry 2022; 28:e202200344. [DOI: 10.1002/chem.202200344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Riddhi R. Golwankar
- Department of Chemistry University of Kansas 1567 Irving Hill Road Lawrence Kansas 66045 USA
| | - Amit Kumar
- Department of Chemistry University of Kansas 1567 Irving Hill Road Lawrence Kansas 66045 USA
- Current address: Department of Chemistry University of Pennsylvania Philadelphia Pennsylvania 19104 USA
| | - Victor W. Day
- Department of Chemistry University of Kansas 1567 Irving Hill Road Lawrence Kansas 66045 USA
| | - James D. Blakemore
- Department of Chemistry University of Kansas 1567 Irving Hill Road Lawrence Kansas 66045 USA
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5
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Jiang S, Cai Y, Carpentier A, Del Rosal I, Maron L, Xu X. Synthesis and Reactivity of Triangular Heterometallic Complexes Containing Zn-Zn Bond. Inorg Chem 2022; 61:8083-8089. [PMID: 35533341 DOI: 10.1021/acs.inorgchem.2c00956] [Citation(s) in RCA: 2] [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 provides a facile access to a series of triangular [Zn2M] (M = group 10 and 11 metals) clusters. Treatment of Zn-Zn-bonded compounds [LZn-ZnL] (L = CH3C(2,6-iPr2C6H3N)CHC(CH3)(NCH2CH2PR2); R = Ph, iPr) with zero-valent transition-metal reagents selectively afforded the corresponding triangular clusters [Zn2M], where M = Ni(0), Pd(0), and Pt(0). Notably, the isoelectronic triangular clusters [Zn2M]+, where M = Ag(I) and Cu(I), could also be obtained by reactions of [LZn-ZnL] with AgOTf and CuOTf, respectively. The [Zn2Ag]+ complex containing elusive Zn-Ag bonds was investigated by density functional theory analysis, showing a 3c-2e bonding feature in the metallic ring. The electrochemical behaviors of [Zn2M] complexes were examined and revealed the donation of electron density from the Zn-Zn σ-bond to the metal centers. Reaction of the [Zn2Ni] complex with isocyanide gave heterometallic species by coordination of isocyanide to the nickel center, keeping the trimetallic ring core structure intact. In contrast, the Zn-Zn bond was rapidly cleaved upon treatment of the [Zn2Ni] complex with dihydrogen or phenyl acetylene, generating the hydride- or acetylide-bridged heterotrimetallic complex.
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Affiliation(s)
- Shengjie Jiang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Yanping Cai
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Ambre Carpentier
- LPCNO, CNRS & INSA, Université Paul Sabatier, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Iker Del Rosal
- LPCNO, CNRS & INSA, Université Paul Sabatier, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Laurent Maron
- LPCNO, CNRS & INSA, Université Paul Sabatier, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Xin Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
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6
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Cai Y, Jiang S, Dong L, Xu X. Synthesis and reactivity of heterometallic complexes containing Mg- or Zn-metalloligands. Dalton Trans 2022; 51:3817-3827. [PMID: 35107467 DOI: 10.1039/d1dt04117g] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Heteronuclear metal complexes comprising main group metals and transition metals have attracted widespread attention from researchers due to their applications in stoichiometric and catalytic activation of small molecules with possible cooperative effects. Herein, the advances of heterometallic complexes containing Mg- or Zn-metalloligands over the past ten years are reviewed. They consist of two parts: (i) synthetic approaches to heterometallic complexes. Only a brief discussion is made on the different Mg/Zn precursors since they have been summarized before. (ii) Stoichiometric and catalytic reactivities of heterometallic complexes containing Mg/Zn metalloligands. The exploration of the cooperative catalytic reaction of heterometallic complexes is still in its infancy, promising but challenging; thus, further investigations are required in the future.
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Affiliation(s)
- Yanping Cai
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China.
| | - Shengjie Jiang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China.
| | - Liqiu Dong
- Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
| | - Xin Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China.
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Shamna S, Fairoosa J, Afsina CMA, Anilkumar G. Palladium-catalysed hydrosilylation of unsaturated compounds. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2021.122236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Fukuda K, Harada T, Iwasawa N, Takaya J. Facile Synthesis and Utilization of Bis(o-phosphinophenyl)zinc as Isolable PZnP-pincer Ligands Enabled by Boron-Zinc Double Transmetallation. Dalton Trans 2022; 51:7035-7039. [DOI: 10.1039/d2dt01222g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bis(o-phosphinophenyl)zinc derivatives were successfully synthesized by the reaction of o-phosphinophenylboronates with dimethylzinc via boron-zinc double transmetallation. The transmetallation was significantly accelerated by the presence of the ortho PR2 substituent to...
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Du J, He X, Hong D, Zhou S, Fang H, Cui P. Phosphinoamido Ligand Supported Heterobimetallic Rare-Earth Metal-Palladium Complexes: Versatile Structures and Redox Reactivities. Dalton Trans 2022; 51:8777-8785. [DOI: 10.1039/d2dt01084d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heterobimetallic Ln(III)-Pd(0) complexes (Ln = Y, Sm, Gd, Yb) featuring tetranuclear structures with COD as bridges were obtained via the metallation of tris(phosphinoamido) rare-earth metal complexes [Ph2PNAd]3Ln (Ad = admantyl)...
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10
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Schroers JP, Kliemann MN, Kollath JMA, Tauchert ME. How Cationic Metalloligands Affect the Coordination of Lewis Basic Ligands in RhI Complexes. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00449] [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)
- Julian P. Schroers
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Max N. Kliemann
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - John M. A. Kollath
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Michael E. Tauchert
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
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11
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Cabeza JA, Fernández I, García-Álvarez P, García-Soriano R, Laglera-Gándara CJ, Toral R. Stannylenes based on pyrrole-phosphane and dipyrromethane-diphosphane scaffolds: syntheses and behavior as precursors to PSnP pincer palladium(II), palladium(0) and gold(I) complexes. Dalton Trans 2021; 50:16122-16132. [PMID: 34668918 DOI: 10.1039/d1dt02967c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2-Ditertbutylphosphanylmethylpyrrole (H2pyrmPtBu2) and 2,2'-bis(diisopropylphosphanylmethyl)-5,5'-dimethyldipyrromethane ((HpyrmPiPr2)2CMe2) have been used to synthesize new P-donor-stabilized stannylenes in which the Sn atom is attached to one, SnCl(HpyrmPtBu2) (1) and Sn{N(SiMe3)2}(HpyrmPtBu2) (2), or two pyrrolyl-phosphane scaffolds, Sn(HpyrmPtBu2)2 (3), or to a dipyrromethane-diphosphane scaffold, Sn(pyrmPiPr2)2CMe2 (4). It has been found that stannylenes 3 and 4 are excellent precursors to transition metal complexes containing PSnP pincer-type ligands. Their reactions with chlorido transition metal complexes have afforded [PdCl{κ3P,Sn,P-SnCl(HpyrmPtBu2)2}] (6), [PdCl{κ3P,Sn,P-SnCl(pyrmPiPr2)2CMe2}] (7) and [Au{κ3P,Sn,P-SnCl(HpyrmPtBu2)2}] (8), which contain a PSnP pincer-type chloridostannyl ligand. While complexes 6 and 7 are square-planar palladium(II) complexes, compound 8 is an uncommon gold(I) complex having a T-shaped coordination geometry with a very long Sn-Au bond (3.120 Å). The T-shaped palladium(0) complex [Pd{κ3P,Sn,P-Sn(pyrmPiPr2)2CMe2}] (9), which contains an unprecedented PSnP pincer-type stannylene that behaves as a Z-type (σ-acceptor) ligand, has been prepared from 4 and [Pd(η3-C3H5)(η5-C5H5)].
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Affiliation(s)
- Javier A Cabeza
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, 33071 Oviedo, Spain.
| | - Israel Fernández
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Pablo García-Álvarez
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, 33071 Oviedo, Spain.
| | - Rubén García-Soriano
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, 33071 Oviedo, Spain.
| | - Carlos J Laglera-Gándara
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, 33071 Oviedo, Spain.
| | - Rubén Toral
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, 33071 Oviedo, Spain.
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12
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González T, García JJ. Catalytic CO2 hydrosilylation with [Mn(CO)5Br] under mild reaction conditions. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Cui P, Wu C, Du J, Luo G, Huang Z, Zhou S. Three-Coordinate Pd(0) with Rare-Earth Metalloligands: Synergetic CO Activation and Double P-C Bond Cleavage-Formation Reactions. Inorg Chem 2021; 60:9688-9699. [PMID: 34125520 DOI: 10.1021/acs.inorgchem.1c00990] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Metalation of β-diketiminato rare-earth metal complexes LnacnacLn(PhNCH2PPh2)2 (Ln = Y, Yb, Lu) with (COD)Pd(CH2SiMe3)2 afforded three-coordinate Pd(0) complexes supported by two sterically less bulky phosphines and a Pd → Ln dative interaction. The Pd(0) center is prone to ligation with isonitrile and CO; in the latter case, the insertion of a second CO with the Y-N bond was assisted via a precoordination of CO on the Pd(0) center, which led to the formation of an anionic Pd(0) carbamoyl. The reaction of the Pd-Y complex with iodobenzene showed a remarkable double P-C bond cleavage-formation pathway within the heterobimetallic Pd-Y core to afford (Ph3P)2PdI(Ph), imine PhNCH2, and a β-diketiminato yttrium diiodide. In the related reaction of LnacnacY(PhNCH2PPh2)2 with (Ph3P)2PdI(Ph), the P-C bond cleavage following with a N-C bond formation was observed. Computational studies revealed a synergetic bimetallic mechanism for these reactions.
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Affiliation(s)
- Peng Cui
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
| | - Changjiang Wu
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
| | - Jun Du
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
| | - Gen Luo
- Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, P. R. China
| | - Zeming Huang
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
| | - Shuangliu Zhou
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
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14
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Tagne Kuate AC, Lalancette RA, Bockfeld D, Tamm M, Jäkle F. Palladium(0) complexes of diferrocenylmercury diphosphines: synthesis, X-ray structure analyses, catalytic isomerization, and C-Cl bond activation. Dalton Trans 2021; 50:4512-4518. [PMID: 33687041 DOI: 10.1039/d1dt00641j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Palladium(0) phosphine complexes are of great importance as catalysts in numerous bond formation reactions that involve oxidative addition of substrates. Highly active catalysts with labile ligands are of particular interest but can be challenging to isolate and structurally characterize. We investigate here the synthesis and chemical reactivity of Pd0 complexes that contain geometrically adaptable diferrocenylmercury-bridged diphosphine chelate ligands (L) in combination with a labile dibenzylideneacetone (dba) ligand. The diastereomeric diphosphines 1a (pSpR, meso-isomer) and 1b (pSpS-isomer) differ in the orientation of the ferrocene moieties relative to the central Ph2PC5H3-Hg-C5H3PPh2 bridging entity. The structurally distinct trigonal LPd0(dba) complexes 2a (meso) and 2b (pSpS) are obtained upon treatment with Pd(dba)2. A competition reaction reveals that 1b reacts faster than 1a with Pd(dba)2. Unexpectedly, catalytic interconversion of 1a (meso) into 1b (rac) is observed at room temperature in the presence of only catalytic amounts of Pd(dba)2. Both Pd0 complexes, 2a and 2b, readily undergo oxidative addition into the C-Cl bond of CH2Cl2 at moderate temperatures with formation of the square-planar trans-chelate complexes LPdIICl(CH2Cl) (3a, 3b). Kinetic studies reveal a significantly higher reaction rate for the meso-isomer 2a in comparison to (pSpS)-2b.
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Affiliation(s)
- Alain C Tagne Kuate
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ 07102, USA.
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15
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Caise A, Hicks J, Ángeles Fuentes M, Goicoechea JM, Aldridge S. Partnering a Three-Coordinate Gallium Cation with a Hydroborate Counter-Ion for the Catalytic Hydrosilylation of CO 2. Chemistry 2021; 27:2138-2148. [PMID: 33169886 DOI: 10.1002/chem.202004408] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/08/2020] [Indexed: 12/16/2022]
Abstract
A novel β-diketiminate stabilized gallium hydride, (Dipp L)Ga(Ad)H (where (Dipp L)={HC(MeCDippN)2 }, Dipp=2,6-diisopropylphenyl and Ad=1-adamantyl), has been synthesized and shown to undergo insertion of carbon dioxide into the Ga-H bond under mild conditions. In this case, treatment of the resulting κ1 -formate complex with triethylsilane does not lead to regeneration of the hydride precursor. However, when combined with B(C6 F5 )3 , (Dipp L)Ga(Ad)H catalyses the reductive hydrosilylation of CO2 . Under stoichiometric conditions, the addition of one equivalent of B(C6 F5 )3 to (Dipp L)Ga(Ad)H leads to the formation of a 3-coordinate cationic gallane complex, partnered with a hydroborate anion, [(Dipp L)Ga(Ad)][HB(C6 F5 )3 ]. This complex rapidly hydrometallates carbon dioxide and catalyses the selective reduction of CO2 to the formaldehyde oxidation level at 60 °C in the presence of Et3 SiH (yielding H2 C(OSiEt3 )2 ). When catalysis is undertaken in the presence of excess B(C6 F5 )3 , appreciable enhancement of activity is observed, with a corresponding reduction in selectivity: the product distribution includes H2 C(OSiEt3 )2 , CH4 and O(SiEt3 )2 . While this system represents proof-of-concept in CO2 hydrosilylation by a gallium hydride system, the TOF values obtained are relatively modest (max. 10 h-1 ). This is attributed to the strength of binding of the formatoborate anion to the gallium centre in the catalytic intermediate (Dipp L)Ga(Ad){OC(H)OB(C6 F5 )3 }, and the correspondingly slow rate of the turnover-limiting hydrosilylation step. In turn, this strength of binding can be related to the relatively high Lewis acidity measured for the [(Dipp L)Ga(Ad)]+ cation (AN=69.8).
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Affiliation(s)
- Alexa Caise
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | - Jamie Hicks
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | - M Ángeles Fuentes
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | - Jose M Goicoechea
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | - Simon Aldridge
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
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Ritter F, Spaniol TP, Douair I, Maron L, Okuda J. Molecular Zinc Hydride Cations [ZnH] + : Synthesis, Structure, and CO 2 Hydrosilylation Catalysis. Angew Chem Int Ed Engl 2020; 59:23335-23342. [PMID: 32931656 PMCID: PMC7756573 DOI: 10.1002/anie.202011480] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Indexed: 01/12/2023]
Abstract
Protonolysis of [ZnH2 ]n with the conjugated Brønsted acid of the bidentate diamine TMEDA (N,N,N',N'-tetramethylethane-1,2-diamine) and TEEDA (N,N,N',N'-tetraethylethane-1,2-diamine) gave the zinc hydride cation [(L2 )ZnH]+ , isolable either as the mononuclear THF adduct [(L2 )ZnH(thf)]+ [BArF 4 ]- (L2 =TMEDA; BArF 4 - =[B(3,5-(CF3 )2 -C6 H3 )4 ]- ) or as the dimer [{(L2 )Zn)}2 (μ-H)2 ]2+ [BArF 4 ]- 2 (L2 =TEEDA). In contrast to [ZnH2 ]n , the cationic zinc hydrides are thermally stable and soluble in THF. [(L2 )ZnH]+ was also shown to form di- and trinuclear adducts of the elusive neutral [(L2 )ZnH2 ]. All hydride-containing cations readily inserted CO2 to give the corresponding formate complexes. [(TMEDA)ZnH]+ [BArF 4 ]- catalyzed the hydrosilylation of CO2 with tertiary hydrosilanes to give stepwise formoxy silane, methyl formate, and methoxy silane. The unexpected formation of methyl formate was shown to result from the zinc-catalyzed transesterification of methoxy silane with formoxy silane, which was eventually converted into methoxy silane as well.
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Affiliation(s)
- Florian Ritter
- Institute of Inorganic ChemistryRWTH Aachen UniversityLandoltweg 152056AachenGermany
| | - Thomas P. Spaniol
- Institute of Inorganic ChemistryRWTH Aachen UniversityLandoltweg 152056AachenGermany
| | - Iskander Douair
- CNRSINSAUPSUMR 5215LPCNOUniversité de Toulouse135 avenue de Rangueil31077ToulouseFrance
| | - Laurent Maron
- CNRSINSAUPSUMR 5215LPCNOUniversité de Toulouse135 avenue de Rangueil31077ToulouseFrance
| | - Jun Okuda
- Institute of Inorganic ChemistryRWTH Aachen UniversityLandoltweg 152056AachenGermany
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17
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Miloserdov FM, Isaac CJ, Beck ML, Burnage AL, Farmer JCB, Macgregor SA, Mahon MF, Whittlesey MK. Impact of the Novel Z-Acceptor Ligand Bis{( ortho-diphenylphosphino)phenyl}zinc (ZnPhos) on the Formation and Reactivity of Low-Coordinate Ru(0) Centers. Inorg Chem 2020; 59:15606-15619. [PMID: 33074685 DOI: 10.1021/acs.inorgchem.0c01683] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The preparation and reactivity with H2 of two Ru complexes of the novel ZnPhos ligand (ZnPhos = Zn(o-C6H4PPh2)2) are described. Ru(ZnPhos)(CO)3 (2) and Ru(ZnPhos)(IMe4)2 (4; IMe4 = 1,3,4,5-tetramethylimidazol-2-ylidene) are formed directly from the reaction of Ru(PPh3)(C6H4PPh2)2(ZnMe)2 (1) or Ru(PPh3)3HCl/LiCH2TMS/ZnMe2 with CO and IMe4, respectively. Structural and electronic structure analyses characterize both 2 and 4 as Ru(0) species in which Ru donates to the Z-type Zn center of the ZnPhos ligand; in 2, Ru adopts an octahedral coordination, while 4 displays square-pyramidal coordination with Zn in the axial position. Under photolytic conditions, 2 loses CO to give Ru(ZnPhos)(CO)2 that then adds H2 over the Ru-Zn bond to form Ru(ZnPhos)(CO)2(μ-H)2 (3). In contrast, 4 reacts directly with H2 to set up an equilibrium with Ru(ZnPhos)(IMe4)2H2 (5), the product of oxidative addition at the Ru center. DFT calculations rationalize these different outcomes in terms of the energies of the square-pyramidal Ru(ZnPhos)L2 intermediates in which Zn sits in a basal site: for L = CO, this is readily accessed and allows H2 to add across the Ru-Zn bond, but for L = IMe4, this species is kinetically inaccessible and reaction can only occur at the Ru center. This difference is related to the strong π-acceptor ability of CO compared to IMe4. Steric effects associated with the larger IMe4 ligands are not significant. Species 4 can be considered as a Ru(0)L4 species that is stabilized by the Ru→Zn interaction. As such, it is a rare example of a stable Ru(0)L4 species devoid of strong π-acceptor ligands.
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Affiliation(s)
- Fedor M Miloserdov
- Department of Chemistry, University of Bath, Bath BA2 3QD, United Kingdom
| | - Connie J Isaac
- Department of Chemistry, University of Bath, Bath BA2 3QD, United Kingdom
| | - Madeleine L Beck
- Department of Chemistry, University of Bath, Bath BA2 3QD, United Kingdom
| | - Arron L Burnage
- Institute of Chemical Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - James C B Farmer
- Institute of Chemical Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Stuart A Macgregor
- Institute of Chemical Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Mary F Mahon
- Department of Chemistry, University of Bath, Bath BA2 3QD, United Kingdom
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18
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Ritter F, John L, Schindler T, Schroers JP, Teeuwen S, Tauchert ME. Evaluation of Pd→B Interactions in Diphosphinoborane Complexes and Impact on Inner-Sphere Reductive Elimination. Chemistry 2020; 26:13436-13444. [PMID: 32428264 PMCID: PMC7692930 DOI: 10.1002/chem.202001189] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 04/20/2020] [Indexed: 11/08/2022]
Abstract
The dative Pd→B interaction in a series of RDPBR’ Pd0 and PdII complexes (RDPBR’=(o‐PR2C6H4)2BR’, diphosphinoborane) was analyzed using XRD, 11B NMR spectroscopy and NBO/NLMO calculations. The borane acceptor discriminates between the oxidation state PdII and Pd0, stabilizing the latter. Reaction of lithium amides with [(RDPBR’)PdII(4‐NO2C6H4)I] chemoselectively yields the C−N coupling product. DFT modelling indicates no significant impact of PdII→B coordination on the inner‐sphere reductive elimination rate.
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Affiliation(s)
- Florian Ritter
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1A, 52074, Aachen, Germany
| | - Lukas John
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1A, 52074, Aachen, Germany
| | - Tobias Schindler
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1A, 52074, Aachen, Germany
| | - Julian P Schroers
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1A, 52074, Aachen, Germany
| | - Simon Teeuwen
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1A, 52074, Aachen, Germany
| | - Michael E Tauchert
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1A, 52074, Aachen, Germany
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19
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Molekulare Zinkhydridkationen [ZnH]
+
: Synthese, Struktur und CO
2
‐Hydrosilylierungskatalyse. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011480] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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20
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Takaya J. Catalysis using transition metal complexes featuring main group metal and metalloid compounds as supporting ligands. Chem Sci 2020; 12:1964-1981. [PMID: 34163959 PMCID: PMC8179324 DOI: 10.1039/d0sc04238b] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 09/09/2020] [Indexed: 12/15/2022] Open
Abstract
Recent development in catalytic application of transition metal complexes having an M-E bond (E = main group metal or metalloid element), which is stabilized by a multidentate ligand, is summarized. Main group metal and metalloid supporting ligands furnish unusual electronic and steric environments and molecular functions to transition metals, which are not easily available with standard organic supporting ligands such as phosphines and amines. These characteristics often realize remarkable catalytic activity, unique product selectivity, and new molecular transformations. This perspective demonstrates the promising utility of main group metal and metalloid compounds as a new class of supporting ligands for transition metal catalysts in synthetic chemistry.
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Affiliation(s)
- Jun Takaya
- Department of Chemistry, Tokyo Institute of Technology O-okayama, Meguro-ku Tokyo 152-8551 Japan
- JST, PRESTO Honcho Kawaguchi Saitama 332-0012 Japan
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21
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Affiliation(s)
- Matthias Vogt
- Institute of Chemistry Faculty of Natural Science II Martin Luther University Halle‐Wittenberg Kurt‐Mothes‐Str. 2 06120 Halle (Saale) Germany
| | - Robert Langer
- Institute of Chemistry Faculty of Natural Science II Martin Luther University Halle‐Wittenberg Kurt‐Mothes‐Str. 2 06120 Halle (Saale) Germany
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22
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Liu J, Fan YZ, Zhang K, Zhang L, Su CY. Engineering Porphyrin Metal–Organic Framework Composites as Multifunctional Platforms for CO2 Adsorption and Activation. J Am Chem Soc 2020; 142:14548-14556. [DOI: 10.1021/jacs.0c05909] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jiewei Liu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P.R. China
- International Healthcare Innovation Institute (Jiangmen), Jiangmen 529040, P. R. China
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guagnzhou 510006, P. R. China
| | - Yan-Zhong Fan
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
| | - Kun Zhang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P.R. China
| | - Li Zhang
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
| | - Cheng-Yong Su
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
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23
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Miloserdov FM, Rajabi NA, Lowe JP, Mahon MF, Macgregor SA, Whittlesey MK. Zn-Promoted C-H Reductive Elimination and H 2 Activation via a Dual Unsaturated Heterobimetallic Ru-Zn Intermediate. J Am Chem Soc 2020; 142:6340-6349. [PMID: 32134645 PMCID: PMC7660749 DOI: 10.1021/jacs.0c01062] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
![]()
Reaction
of [Ru(PPh3)3HCl] with LiCH2TMS,
MgMe2, and ZnMe2 proceeds with
chloride abstraction and alkane elimination to form the bis-cyclometalated
derivatives [Ru(PPh3)(C6H4PPh2)2H][M′] where [M′] = [Li(THF)2]+ (1), [MgMe(THF)2]+ (3), and [ZnMe]+ (4),
respectively. In the presence of 12-crown-4, the reaction with LiCH2TMS yields [Ru(PPh3)(C6H4PPh2)2H][Li(12-crown-4)2] (2). These four complexes demonstrate increasing interaction
between M′ and the hydride ligand in the [Ru(PPh3)(C6H4PPh2)2H]− anion following the trend 2 (no interaction) < 1 < 3 < 4 both in the solid-state
and solution. Zn species 4 is present as three isomers
in solution including square-pyramidal [Ru(PPh3)2(C6H4PPh2)(ZnMe)] (5), that is formed via C–H reductive elimination and features
unsaturated Ru and Zn centers and an axial Z-type [ZnMe]+ ligand. A [ZnMe]+ adduct of 5, [Ru(PPh3)2(C6H4PPh2)(ZnMe)2][BArF4] (6) can be trapped
and structurally characterized. 4 reacts with H2 at −40 °C to form [Ru(PPh3)3(H)3(ZnMe)], 8-Zn, and contrasts the analogous reactions
of 1, 2, and 3 that all require
heating to 60 °C. This marked difference in reactivity reflects
the ability of Zn to promote a rate-limiting C–H reductive
elimination step, and calculations attribute this to a significant
stabilization of 5 via Ru → Zn donation. 4 therefore acts as a latent source of 5 and
this operational “dual unsaturation” highlights the
ability of Zn to promote reductive elimination in these heterobimetallic
systems. Calculations also highlight the ability of the heterobimetallic
systems to stabilize developing protic character of the transferring
hydrogen in the rate-limiting C–H reductive elimination transition
states.
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Affiliation(s)
- Fedor M Miloserdov
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | - Nasir A Rajabi
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
| | - John P Lowe
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | - Mary F Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | - Stuart A Macgregor
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
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24
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Tauchert ME, Okuda J. A Hexagonal Planar Metal Complex. Angew Chem Int Ed Engl 2020; 59:4214-4215. [PMID: 31976595 DOI: 10.1002/anie.201915432] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Indexed: 11/08/2022]
Abstract
A six-coordinate [ML3 Z3 ]-type transition-metal complex with a hexagonal planar geometry has been isolated and characterized, extending the scope of six-coordinate metal coordination compounds to those with a geometry beyond octahedral and trigonal prismatic.
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Affiliation(s)
- Michael E Tauchert
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany
| | - Jun Okuda
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany
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25
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Affiliation(s)
- Michael E. Tauchert
- Institut für Anorganische ChemieRWTH Aachen Landoltweg 1 52056 Aachen Deutschland
| | - Jun Okuda
- Institut für Anorganische ChemieRWTH Aachen Landoltweg 1 52056 Aachen Deutschland
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26
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Murata T, Hiyoshi M, Ratanasak M, Hasegawa JY, Ema T. Synthesis of silyl formates, formamides, and aldehydes via solvent-free organocatalytic hydrosilylation of CO 2. Chem Commun (Camb) 2020; 56:5783-5786. [PMID: 32322865 DOI: 10.1039/d0cc01371d] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Carbon dioxide (CO2) was used as a C1 source to prepare silyl formates, formamides, and aldehydes. Tetrabutylammonium acetate (TBAA) catalyzed the solvent-free N-formylation of amines with CO2 and hydrosilane to give formamides including Weinreb formamide, Me(MeO)NCHO, which was successively converted into aldehydes by one-pot reactions with Grignard reagents.
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Affiliation(s)
- Takumi Murata
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Okayama 700-8530, Japan.
| | - Mahoko Hiyoshi
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Okayama 700-8530, Japan.
| | - Manussada Ratanasak
- Institute for Catalysis, Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan.
| | - Jun-Ya Hasegawa
- Institute for Catalysis, Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan.
| | - Tadashi Ema
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Okayama 700-8530, Japan.
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27
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Zhang Q, Fukaya N, Fujitani T, Choi JC. Carbon Dioxide Hydrosilylation to Methane Catalyzed by Zinc and Other First-Row Transition Metal Salts. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20190203] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Qiao Zhang
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba Central 5, Tsukuba, Ibaraki 305-8565, Japan
| | - Norihisa Fukaya
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba Central 5, Tsukuba, Ibaraki 305-8565, Japan
| | - Tadahiro Fujitani
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba Central 5, Tsukuba, Ibaraki 305-8565, Japan
| | - Jun-Chul Choi
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba Central 5, Tsukuba, Ibaraki 305-8565, Japan
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28
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Wilkins LC, Kim Y, Litle ED, Gabbaï FP. Stabilized Carbenium Ions as Latent, Z‐type Ligands. Angew Chem Int Ed Engl 2019; 58:18266-18270. [DOI: 10.1002/anie.201911662] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Indexed: 12/30/2022]
Affiliation(s)
- Lewis C. Wilkins
- Department of ChemistryTexas A&M University College Station TX 77843 USA
| | - Youngmin Kim
- Department of ChemistryTexas A&M University College Station TX 77843 USA
| | - Elishua D. Litle
- Department of ChemistryTexas A&M University College Station TX 77843 USA
| | - François P. Gabbaï
- Department of ChemistryTexas A&M University College Station TX 77843 USA
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29
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Yamada R, Iwasawa N, Takaya J. Rhodium-Catalyzed C-H Activation Enabled by an Indium Metalloligand. Angew Chem Int Ed Engl 2019; 58:17251-17254. [PMID: 31559666 DOI: 10.1002/anie.201910197] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 09/06/2019] [Indexed: 12/22/2022]
Abstract
Rhodium complexes with an indium metalloligand were successfully synthesized by utilizing a pyridine-tethered cyclopentadienyl ligand as a support for an In-Rh bond. The indium metalloligand dramatically changes the electronic and redox properties of the rhodium metal, thereby enabling catalysis of sp2 C-H bond activation.
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Affiliation(s)
- Ryosuke Yamada
- Department of Chemistry, School of Science, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Nobuharu Iwasawa
- Department of Chemistry, School of Science, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Jun Takaya
- Department of Chemistry, School of Science, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan.,JST, PRESTO, Honcho, Kawaguchi, Saitama, 332-0012, Japan
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30
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Wilkins LC, Kim Y, Litle ED, Gabbaï FP. Stabilized Carbenium Ions as Latent, Z‐type Ligands. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201911662] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Lewis C. Wilkins
- Department of ChemistryTexas A&M University College Station TX 77843 USA
| | - Youngmin Kim
- Department of ChemistryTexas A&M University College Station TX 77843 USA
| | - Elishua D. Litle
- Department of ChemistryTexas A&M University College Station TX 77843 USA
| | - François P. Gabbaï
- Department of ChemistryTexas A&M University College Station TX 77843 USA
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31
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Yamada R, Iwasawa N, Takaya J. Rhodium‐Catalyzed C−H Activation Enabled by an Indium Metalloligand. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201910197] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Ryosuke Yamada
- Department of Chemistry School of Science Tokyo Institute of Technology, O-okayama, Meguro-ku Tokyo 152-8551 Japan
| | - Nobuharu Iwasawa
- Department of Chemistry School of Science Tokyo Institute of Technology, O-okayama, Meguro-ku Tokyo 152-8551 Japan
| | - Jun Takaya
- Department of Chemistry School of Science Tokyo Institute of Technology, O-okayama, Meguro-ku Tokyo 152-8551 Japan
- JST, PRESTO, Honcho Kawaguchi Saitama 332-0012 Japan
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32
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Chen J, McGraw M, Chen EYX. Diverse Catalytic Systems and Mechanistic Pathways for Hydrosilylative Reduction of CO 2. CHEMSUSCHEM 2019; 12:4543-4569. [PMID: 31386795 DOI: 10.1002/cssc.201901764] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 08/03/2019] [Indexed: 06/10/2023]
Abstract
Catalytic hydrosilylation of carbon dioxide has emerged as a promising approach for carbon dioxide utilization. It allows the reductive transformation of carbon dioxide into value-added products at the levels of formate, formaldehyde, methanol, and methane. Tremendous progress has been made in the area of carbon dioxide hydrosilylation since the first reports in 1981. This focus review describes recent advances in the design and catalytic performance of leading catalyst systems, including transition-metal, main-group, and transition-metal/main-group and main-group/main-group tandem catalysts. Emphasis is placed on discussions of key mechanistic features of these systems and efforts towards the development of more selective, efficient, and sustainable carbon dioxide hydrosilylation processes.
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Affiliation(s)
- Jiawei Chen
- Department of Chemistry, Columbia University, 3000 Broadway, New York, NY, 10027, USA
| | - Michael McGraw
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523, USA
| | - Eugene Y-X Chen
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523, USA
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33
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Jiang S, Chen M, Xu X. Formation of Zn-Zn and Zn-Pd Bonded Complexes by Reactions of Terminal Zinc Hydrides with Pd(II) Species. Inorg Chem 2019; 58:13213-13220. [PMID: 31502831 DOI: 10.1021/acs.inorgchem.9b02062] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Divalent palladium-induced homocoupling of terminal zinc hydrides to zinc-zinc bonded complexes was achieved herein. Reactions of zinc hydrides [LZnH] (L = CH3C(2,6-iPr2C6H3N)CHC(CH3)(N(CH2)nCH2PPh2); 1a: n = 1; 1b: n = 2) with 0.5 equiv of allyl(cyclopentadienyl)palladium(II) afforded heterotrinuclear [Zn2Pd] complexes 3 containing direct Zn-Zn and Zn-Pd bonds, with concomitant elimination of propylene and cyclopentadiene. Complexes 3 were also accessed by the reactions of zinc hydrides 1 with allylpalladium(II) chloride with release of propylene and hydrogen chloride. Treatment of zinc hydrides 1 with 1 equiv of allyl(cyclopentadienyl)palladium(II) gave Zn-Pd bonded complex 5 by elimination of propylene, which can be transformed into heterotrinuclear complex 3 by further reaction with one additional molar equivalent of zinc hydrides. Heterobimetallic Zn-Pd complex 5b was found to be an effective catalyst in the hydrosilylation of benzaldehyde and its derivatives. Reaction of 5b with silane reagent Ph2SiH2 produced [Pd2Si2H2] complex 8 with cleavage of the Pd-Zn bond, which served as an initiating species in the catalytic reaction. Complexes 4b, 5, and 8 in this study were characterized by X-ray diffraction.
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Affiliation(s)
- Shengjie Jiang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , P. R. China
| | - Min Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , P. R. China
| | - Xin Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , P. R. China
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34
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Cammarota RC, Xie J, Burgess SA, Vollmer MV, Vogiatzis KD, Ye J, Linehan JC, Appel AM, Hoffmann C, Wang X, Young VG, Lu CC. Thermodynamic and kinetic studies of H 2 and N 2 binding to bimetallic nickel-group 13 complexes and neutron structure of a Ni(η 2-H 2) adduct. Chem Sci 2019; 10:7029-7042. [PMID: 31588270 PMCID: PMC6676469 DOI: 10.1039/c9sc02018g] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 06/08/2019] [Indexed: 12/17/2022] Open
Abstract
Understanding H2 binding and activation is important in the context of designing transition metal catalysts for many processes, including hydrogenation and the interconversion of H2 with protons and electrons. This work reports the first thermodynamic and kinetic H2 binding studies for an isostructural series of first-row metal complexes: NiML, where M = Al (1), Ga (2), and In (3), and L = [N(o-(NCH2PiPr2)C6H4)3]3-. Thermodynamic free energies (ΔG°) and free energies of activation (ΔG ‡) for binding equilibria were obtained via variable-temperature 31P NMR studies and lineshape analysis. The supporting metal exerts a large influence on the thermodynamic favorability of both H2 and N2 binding to Ni, with ΔG° values for H2 binding found to span nearly the entire range of previous reports. The non-classical H2 adduct, (η2-H2)NiInL (3-H2), was structurally characterized by single-crystal neutron diffraction-the first such study for a Ni(η2-H2) complex or any d10 M(η2-H2) complex. UV-Vis studies and TD-DFT calculations identified specific electronic structure perturbations of the supporting metal which poise NiML complexes for small-molecule binding. ETS-NOCV calculations indicate that H2 binding primarily occurs via H-H σ-donation to the Ni 4p z -based LUMO, which is proposed to become energetically accessible as the Ni(0)→M(iii) dative interaction increases for the larger M(iii) ions. Linear free-energy relationships are discussed, with the activation barrier for H2 binding (ΔG ‡) found to decrease proportionally for more thermodynamically favorable equilibria. The ΔG° values for H2 and N2 binding to NiML complexes were also found to be more exergonic for the larger M(iii) ions.
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Affiliation(s)
- Ryan C Cammarota
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
| | - Jing Xie
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
- Supercomputing Institute , Chemical Theory Center , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA
- Key Laboratory of Cluster Science of Ministry of Education , School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , China
| | - Samantha A Burgess
- Catalysis Science Group , Pacific Northwest National Laboratory , P. O. Box 999 , MS K2-57 , Richland , Washington 99352 , USA
| | - Matthew V Vollmer
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
| | - Konstantinos D Vogiatzis
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
- Supercomputing Institute , Chemical Theory Center , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA
- Department of Chemistry , University of Tennessee , Knoxville , Tennessee 37996 , USA
| | - Jingyun Ye
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
- Supercomputing Institute , Chemical Theory Center , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA
| | - John C Linehan
- Catalysis Science Group , Pacific Northwest National Laboratory , P. O. Box 999 , MS K2-57 , Richland , Washington 99352 , USA
| | - Aaron M Appel
- Catalysis Science Group , Pacific Northwest National Laboratory , P. O. Box 999 , MS K2-57 , Richland , Washington 99352 , USA
| | - Christina Hoffmann
- Neutron Scattering Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , USA
| | - Xiaoping Wang
- Neutron Scattering Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , USA
| | - Victor G Young
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
| | - Connie C Lu
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
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Růžičková Z, Jambor R, Novák M. Spontaneous Hydrosilylation of Substituted C=N Imines. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900516] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Zdeňka Růžičková
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice Studentská 573 53210 Pardubice Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice Studentská 573 53210 Pardubice Czech Republic
| | - Miroslav Novák
- Institute of Chemistry and Technology of Macromolecular Materials Faculty of Chemical Technology University of Pardubice Studentská 573 53210 Pardubice Czech Republic
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Lo Y, Gabbaï FP. An Antimony(V) Dication as a Z‐Type Ligand: Turning on Styrene Activation at Gold. Angew Chem Int Ed Engl 2019; 58:10194-10197. [DOI: 10.1002/anie.201903964] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Ying‐Hao Lo
- Department of Chemistry Texas A&M University College Station TX 77843 USA
| | - François P. Gabbaï
- Department of Chemistry Texas A&M University College Station TX 77843 USA
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Lo Y, Gabbaï FP. An Antimony(V) Dication as a Z‐Type Ligand: Turning on Styrene Activation at Gold. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903964] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Ying‐Hao Lo
- Department of Chemistry Texas A&M University College Station TX 77843 USA
| | - François P. Gabbaï
- Department of Chemistry Texas A&M University College Station TX 77843 USA
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