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Uemura K, Adachi T, Takamori A, Yoshida M. Antiferromagnetic Interactions through the Thirteen Å Metal-Metal Distances in Heterometallic One-Dimensional Chains. Angew Chem Int Ed Engl 2024; 63:e202408415. [PMID: 38844418 DOI: 10.1002/anie.202408415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Indexed: 07/17/2024]
Abstract
A heterometallic and paramagnetic one-dimensional aligned chain in -Rh(+2)-Rh(+2)- Pt(+2)-Ni(+2)-Pt(+2)- with direct metal-metal bonds was obtained via HOMO-LUMO interactions at the σ* (dz2) orbital between [Rh2(O2CCH3)4] and [Pt2Ni(piam)4(NH3)4] (piam=pivalamidate). The one-dimensional chains had straight backbones attributed to face-to-face stacking of each complex, and the Ni atoms were separated by approximately 13 Å from four different metals. Each Ni atom had two unpaired electrons in the d-orbitals, which strongly exchanged with J=-37.9 cm-1 through the diamagnetic -Pt-Rh-Rh-Pt- bonds.
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Affiliation(s)
- Kazuhiro Uemura
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - Tomonori Adachi
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - Atsushi Takamori
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - Michiyuki Yoshida
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
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Uemura K, Ikeda Y. Structure and redox behaviour of a paramagnetic Rh-Pt-Cu-Pt-Rh heterometallic-extended metal-atom chain. Dalton Trans 2024; 53:12867-12871. [PMID: 39037487 DOI: 10.1039/d4dt01134a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Abstract
A paramagnetic, pentanuclear, metal-metal bonded complex comprising three metals is isolated. The Cu dx2-y2 orbital of the Rh-Pt-Cu-Pt-Rh chain contains an unpaired electron. The close energetic levels and symmetric overlap of the Cu dx2-y2 and Rh-Pt δ* induces a charge-transfer reaction to achieve the diamagnetic Rh-Pt-Cu-Pt-Rh complex.
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Affiliation(s)
- Kazuhiro Uemura
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan.
| | - Yuya Ikeda
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan.
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Zhu B, Murahashi T, Sakaki S. Palladium cluster complex [Pd 13(μ 4-C 7H 7) 6] 2+ (C 7H 7 = tropylium) with an fcc-close-packed cuboctahedral Pd 13 core and isomers: theoretical insight into ligand-control of the Pd 13 core structure. Phys Chem Chem Phys 2023; 25:25670-25680. [PMID: 37721330 DOI: 10.1039/d3cp03262k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2023]
Abstract
One of the challenging targets in today's chemistry is size-, shape- and metal-atom packing-controlled synthesis of nano-scale transition metal cluster complexes because key factors governing these features have been elusive. Here, we present a DFT study on a recently synthesized palladium cluster complex [Pd13(μ4-C7H7)6]2+ (named Cubo-μ4; C7H7 = tropylium) with an fcc-close-packed cuboctahedral Pd13 core and possible isomers. The stability decreases in the order Cubo-μ4 > [Pd13(μ3-C7H7)3(μ4-C7H7)3]2+ with an hcp-close-packed anticuboctahedral Pd13 core (Anti-μ3,4) > [Pd13(μ3-C7H7)6]2+ with a non-close packed icosahedral Pd13 core (Ih-μ3) > [Pd13(μ4-C7H7)6]2+ with an anticuboctahedral Pd13 core (Anti-μ4) > [Pd13(μ3-C7H7)6]2+ with a cuboctahedral Pd13 core (Cubo-μ3). This ordering disagrees with the stability of the Pd13 core. The key factor governing the stability and metal-atom packing manner of these Pd13 cluster complexes is not the stability of the Pd13 core but the interaction energy between the Pd13 core and the [(C7H7)6]2+ ligand shell. The interaction energy is mainly determined by the charge-transfer from the Pd13 core to the [(C7H7)6]2+ ligand shell and the coordination mode of the C7H7 ligand (μ3- vs. μ4-coordination bond). In the μ4-coordination, all seven C atoms of the C7H7 ligand interact with four Pd atoms of the Pd4 plane using two CC double bonds and one π-allyl moiety. On the other hand, in the μ3-coordination, one or two C atoms of C7H7 cannot form bonding interaction with the Pd atom of the Pd3 plane. Thus, the use of appropriate capping ligands is one of the key points in the synthesis of nano-scale metal cluster complexes.
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Affiliation(s)
- Bo Zhu
- Institute of Functional Materials Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.
| | - Tetsuro Murahashi
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan.
| | - Shigeyoshi Sakaki
- Institute for Integrated Cell-Material Sciences, Rohm Plaza R312, Kyoto University, Kyoto-Daigaku Katsura, Nishikyo-ku, Kyoto 615-8246, Japan.
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Shenoy RV, Jones PG, Vicente J, Martínez-Viviente E. Synthesis of mono-, di- and tripalladated 1,3,5-benzenetristyryl complexes. CO insertion to give a dipalladated indenone. Dalton Trans 2023; 52:3786-3794. [PMID: 36866460 DOI: 10.1039/d3dt00091e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
The tribrominated arenes 1,3,5-C6(E-CHCHAr)3Br3 (Ar = Ph, (I), p-To (I')), add oxidatively to [Pd(dba)2] ([Pd2(dba)3]·dba) in the presence of two equivalents of a phosphine (PPh3 or PMe2Ph) to form the monopalladated complexes trans-[Pd{C6(E-CHCHAr)3Br2}Br(L)2] (Ar = Ph, L = PPh3 (1a), Ar = p-To, L = PPh3 (1a'), Ar = Ph, L = PMe2Ph (1b)), while the reaction in a 1 : 2 : 4 arene : Pd : PMe2Ph molar ratio affords the dipalladated complex [{trans-PdBr(PMe2Ph)2}2{μ2-C6(E-CHCHPh)3Br}] (2b). Both I and I' add oxidatively to 3 equivalents of [Pd(dba)2] in the presence of the chelating N-donor ligand tmeda (N,N,N',N'-tetramethylethylenediamine) to form the tripalladated complexes [{PdBr(tmeda)}3{μ3-C6(E-CHCHAr)3}] (Ar = Ph, (3c), p-To (3c')). Complex 3c reacts with PMe3 to form [{trans-PdBr(PMe3)2}3{μ3-C6(E-CHCHPh)3}] (3d). Compound 3c also reacts with CO to give the novel dipalladated indenone [2-Ph-4,6-{PdBr(tmeda)}2-5,7-(E-CHCHPh)2-inden-1-one] (4). The crystal structures of 1a' and 1b were determined by X-ray diffraction studies.
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Affiliation(s)
- Rashmi V Shenoy
- Grupo de Química Organometálica, Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, E-30071 Murcia, Spain.
| | - Peter G Jones
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany.
| | - José Vicente
- Grupo de Química Organometálica, Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, E-30071 Murcia, Spain.
| | - Eloísa Martínez-Viviente
- Grupo de Química Organometálica, Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, E-30071 Murcia, Spain.
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Uemura K, Ikeda Y, Takamori A, Takeyama T, Iwatsuki S. Asymmetrical Platinum and Rhodium Dinuclear Complex Strongly Bound to Filled d z 2 ${{_{{\rm z}{^{2}}}}}$ Complexes by Unbridged Pt-Metal Bonds: Toward Heterometallic-Extended Metal Atom Chains. Chemistry 2023; 29:e202204057. [PMID: 36585834 DOI: 10.1002/chem.202204057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 12/30/2022] [Accepted: 12/30/2022] [Indexed: 01/01/2023]
Abstract
Heterometallic extended metal atom chains (EMACs) aligned with three types of metal were rationally synthesized by forming unbridged metal-metal bonds based on the interactions between highest occupied and lowest unoccupied molecular orbitals at the d z 2 ${{_{{\rm z}{^{2}}}}}$ orbital. These chains form pentanuclear structures aligned as Rh-Pt-M-Pt-Rh with relatively large formation constants of 5.0×1013 M-2 for M=Pt and 6.3×1011 M-2 for M=Pd, while retaining their backbones in solution. In the case of M=Cu, the original Cu(+2) atoms were reduced to Cu(+1) during the synthetic process. Cu(+1) has an unprecedented trigonal bipyramidal coordination geometry. The reported synthesis based on asymmetrical dinuclear complexes provides a guideline for the synthesis of hetero-EMACs to allow several analogs through judicious combinations realized by tuning the number of metal nuclei and metal species.
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Affiliation(s)
- Kazuhiro Uemura
- Department of Chemistry and Biomolecular Science Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - Yuya Ikeda
- Department of Chemistry and Biomolecular Science Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - Atsushi Takamori
- Department of Chemistry and Biomolecular Science Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - Tomoyuki Takeyama
- Laboratory for Zero-Carbon Energy Institute of Innovative Research, Tokyo Institute of Technology 2-12-1N1-32, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Satoshi Iwatsuki
- Department of Chemistry, Konan University, Higashinada-ku, Kobe, 658-8501, Japan
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Bai G, Yang Y, Wang X, Wu J, Wang H, Ye X, Bao X. DBU Promoted Polysubstituted Arene Formation via a Michael Addition/Cyclization/Elimination Cascade Reaction. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238167. [PMID: 36500260 PMCID: PMC9738611 DOI: 10.3390/molecules27238167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/19/2022] [Accepted: 11/20/2022] [Indexed: 11/25/2022]
Abstract
The straightforward construction of polysubstituted arenes is essential in both synthetic chemistry and medicinal chemistry. Herein, we reported a DBU promoted Michael addition/cyclization/elimination cascade reaction between vinylogous malononitrile derivatives and chlorinated nitrostyrenes for the synthesis of polysubstituted arenes. The method features mild reaction conditions, wide substrate scope and high yield. Interestingly, preliminary study of the enantioselective version of this cascade was conducted to give chiral biaryl atropisomers with up to 40% ee through center-to-axial chirality transfer strategy.
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Affiliation(s)
- Guishun Bai
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yang Yang
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xingyue Wang
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jiamin Wu
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Hong Wang
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
- Zhejiang International Sci-Tech Cooperation Base for the Exploitation and Utilization of Nature Product, Hangzhou 310014, China
- Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province, Hangzhou 310014, China
- Correspondence: (H.W.); (X.Y.); (X.B.)
| | - Xinyi Ye
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
- Zhejiang International Sci-Tech Cooperation Base for the Exploitation and Utilization of Nature Product, Hangzhou 310014, China
- Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province, Hangzhou 310014, China
- Correspondence: (H.W.); (X.Y.); (X.B.)
| | - Xiaoze Bao
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
- Zhejiang International Sci-Tech Cooperation Base for the Exploitation and Utilization of Nature Product, Hangzhou 310014, China
- Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province, Hangzhou 310014, China
- Correspondence: (H.W.); (X.Y.); (X.B.)
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Uemura K, Takamori A. Recent studies on the magnetic properties of paramagnetic metals linked by diamagnetic second metals. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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