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Magnetostructural Studies on Zigzag One-Dimensional Coordination Polymers Formed by Tetraamidatodiruthenium(II,III) Paddlewheel Units Bridged by SCN Ligands. MAGNETOCHEMISTRY 2019. [DOI: 10.3390/magnetochemistry5030040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We report herein on three zigzag one-dimensional coordination polymers of {[Ru2(μ-NHOCR)4](μ-SCN)}n (R = o-Me-C6H4 (2), m-Me-C6H4 (3), p-Me-C6H4 (4)) formula. These new compounds have been obtained by reaction of the corresponding [Ru2(μ-NHOR)4(THF)2](BF4) complex with (NBu4)(SCN) under different synthetic conditions. The crystal structure of [Ru2(μ-NHOCC6H4-o-Me)4(THF)2](BF4) (1), 2 and 3 are presented. A cis-(2,2) arrangement of the amidate ligands of the [Ru2(μ-NHOCR)4]+ units is observed in all cases. Interestingly, the structures of 2 and 3 show linkage isomerism in alternated tetraamidatodiruthenium units whose axial positions are occupied by the same type of donor atom of the SCN ligands. This results in zigzag chains with a Ru-S-C angle of 98.97° and Ru-N-C angle of 169.36° in the case of 2 and 97.99° and 159.26°, respectively, in the case of 3. The magnetic data obtained for 2–4 are indicative of a σ2π4δ2(π*δ*)3 ground state (S = 3/2) and a large zero-field splitting (ZFS) in all cases (D = 54.57, 62.72 and 43.00 cm−1 for 2–4, respectively). Similar small antiferromagnetic interactions between diruthenium units (zJ = −0.93, −0.79 and −1.11 cm−1 for 2–4, respectively) are estimated for all the polymers, suggesting an analogous zigzag arrangement of the chains for 4.
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2
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Khan FF, Klein J, Priego JL, Sarkar B, Jiménez-Aparicio R, Lahiri GK. Questions of Noninnocence and Ease of Azo Reduction in Diruthenium Frameworks with a 1,8-Bis((E)-phenyldiazenyl)naphthalene-2,7-dioxido Bridge. Inorg Chem 2018; 57:12800-12810. [DOI: 10.1021/acs.inorgchem.8b01996] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Farheen Fatima Khan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Johannes Klein
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
| | - José Luis Priego
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria, E-28040 Madrid, Spain
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
| | - Reyes Jiménez-Aparicio
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria, E-28040 Madrid, Spain
| | - Goutam Kumar Lahiri
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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Delgado-Martínez P, González-Prieto R, Jiménez-Aparicio R, Torres MR, Priego JL. catena-Poly[[tetrakis(μ-3,4,5-trimethoxybenzoato-κ 2
O: O′)diruthenium(II,III)( Ru— Ru)]-μ-chlorido] with an unknown solvent. IUCRDATA 2018. [DOI: 10.1107/s2414314618000792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
[Ru2Cl{μ-O2CC6H2-3,4,5-(OMe)3}4]
n
was prepared by the reaction of [Ru2Cl(μ-O2CCH3]
n
with 3,4,5-trimethoxybenzoic acid. The complex shows a paddlewheel structure with pairs of Ru atoms bridged by four carboxylate ligands. The axial positions are occupied by shared chloride ions giving zigzag chains. These chains are disposed parallel to each other to give a three-dimensional arrangement packed only by van der Waals forces. The final refinement shows high values of residual non-modelled electronic density. Therefore, the SQUEEZE utility [Spek (2015). Acta Cryst. C71, 9–18] was used to remove its contribution to the overal intensity data. The electron density modelled by SQUEEZE is consistent with around eight water molecules per unit cell.
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Uemura K, Uesugi N, Matsuyama A, Ebihara M, Yoshikawa H, Awaga K. Integration of Paramagnetic Diruthenium Complexes into an Extended Chain by Heterometallic Metal-Metal Bonds with Diplatinum Complexes. Inorg Chem 2016; 55:7003-11. [PMID: 27348516 DOI: 10.1021/acs.inorgchem.6b00741] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We successfully obtained a paramagnetic one-dimensional (1D) chain complex [{Ru2(O2CCH3)4}{Pt2(piam)2(NH3)4}2]n(PF6)4n·4nH2O (2; piam = pivalamidate) extended by metal-metal bonds. Compound 2 comprises two types of metal species, ruthenium and platinum, where an acetate-bridged dinuclear ruthenium complex (i.e., [Ru2]) and a pivalamidate-bridged platinum complex (i.e., [Pt2]) are connected by axial metal-metal bonds, forming an attractive quasi-1D infinite chain that can be expressed as -{[Pt2]-[Ru2]-[Pt2]}n-. Such axial metal-metal bonds are attributed to the interaction between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) along the z axis, where both the HOMO in [Pt2(II,II)] and the LUMO in [Ru2(II,II)] are σ* orbitals associated with metal cores. The crystal structure and X-ray photoelectron spectrum for 2 reveal that metal oxidation states are -{[Pt2(II,II)]-[Ru2(II,II)]-[Pt2(II,II)]}n-, where [Ru2(II,II)] can have an electronic configuration of σ(2)π(4)δ(2)δ*(2)π*(2) or σ(2)π(4)δ(2)π*(4). The magnetic susceptibility of 2 has a μeff [∝(χT)(1/2)] value of 2.77 μB per [Pt2(II,II)]-[Ru2(II,II)]-[Pt2(II,II)] unit at 300 K, showing that two unpaired electrons lie on π*(Ru2). Magnetic measurements performed at temperatures of 2-300 K indicate that S = 1 Ru2(II,II) units are weakly antiferromagnetically coupled (zJ = -1.4 cm(-1)) with a large zero-field splitting (D = 221 cm(-1)).
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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
| | - Naoyuki Uesugi
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University , Yanagido 1-1, Gifu 501-1193, Japan
| | - Akina Matsuyama
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University , Yanagido 1-1, Gifu 501-1193, Japan
| | - Masahiro Ebihara
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University , Yanagido 1-1, Gifu 501-1193, Japan
| | - Hirofumi Yoshikawa
- Department of Chemistry and Research Center for Materials Science (RCMS), Nagoya University , Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Kunio Awaga
- Department of Chemistry and Research Center for Materials Science (RCMS), Nagoya University , Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
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5
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Li S, Wang X, Zhang Z, Zhao Y, Wang X. Isolation and structural characterization of a mainly ligand-based dimetallic radical. Dalton Trans 2015; 44:19754-7. [PMID: 26511528 DOI: 10.1039/c5dt03578c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The isolation and crystal structure of a mainly ligand-based dimetallic radical of ruthenium together with induced sp3 C–H bond activation were described.
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Affiliation(s)
- Shuyu Li
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
| | - Xingyong Wang
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
| | - Zaichao Zhang
- School of Chemistry and Chemical Engineering
- Huaiyin Normal University
- Huai'an 223300
- China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
| | - Xinping Wang
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210093
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Delgado-Martínez P, González-Prieto R, Gómez-García CJ, Jiménez-Aparicio R, Priego JL, Torres MR. Structural, magnetic and electrical properties of one-dimensional tetraamidatodiruthenium compounds. Dalton Trans 2014; 43:3227-37. [DOI: 10.1039/c3dt52727a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Delgado P, González-Prieto R, Jiménez-Aparicio R, Perles J, Priego JL, Torres RM. Comparative study of different methods for the preparation of tetraamidato- and tetracarboxylatodiruthenium compounds. Structural and magnetic characterization. Dalton Trans 2012; 41:11866-74. [PMID: 22911274 DOI: 10.1039/c2dt30939d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Solvothermal and microwave assisted synthesis were used as green and very useful alternative methods to obtain new chloridotetraamidatodiruthenium compounds, [Ru(2)Cl(μ-NHOCR)(4)](n) [R = Me-o-C(6)H(4) (1), Me-m-C(6)H(4) (2), Me-p-C(6)H(4) (3)]. The analogous tetracarboxylato complexes [Ru(2)Cl(μ-O(2)CR)(4)](n) [R = Me-o-C(6)H(4) (4), Me-m-C(6)H(4) (5), Me-p-C(6)H(4) (6)] have also been obtained. These synthetic methods allow the use of greener solvents like water or ethanol. Moreover, solvothermal synthesis permits the direct crystallization of the desired complexes, which are extremely insoluble in common solvents, during the synthetic process. Therefore, the crystal structure of all of them has been established using single crystal X-ray diffraction. Complex 1 shows a Ru-Cl-Ru angle of 180° and constitutes the first example of a chloridotetraamidatodiruthenium derivative displaying linear chains in the solid state. In contrast, complexes 2·0.5EtOH, and 3-6 show polymeric arrangements with the diruthenium units linked by chloride ligands, forming zigzag chains with Ru-Cl-Ru angles ranging between 117.03(6) and 121.45(3)°. All of the complexes show magnetic moments at room temperature corresponding to three unpaired electrons in agreement with the σ(2)π(4)δ(2)(π*δ*)(3) ground-state configuration, which indicates a similar magnetic behaviour in amidato and carboxylato derivatives. In the linear arrangement of complex 1 there is a better magnetic communication between diruthenium units (antiferromagnetic coupling, zJ = -10.5 or -8.7 cm(-1)) than the one observed in the zigzag 2-6 complexes (zJ = -1.23 to -5.75 cm(-1)).
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Affiliation(s)
- Patricia Delgado
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria, E-28040 Madrid, Spain
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8
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Das D, Scherer TM, Das A, Mondal TK, Mobin SM, Fiedler J, Priego JL, Jiménez-Aparicio R, Kaim W, Lahiri GK. The intricate paramagnetic state of [Os(Q)2(bpy)]+, Q = 4,6-di-tert-butyl-o-iminobenzoquinone. Dalton Trans 2012; 41:11675-83. [DOI: 10.1039/c2dt30903c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Das D, Sarkar B, Kumbhakar D, Mondal TK, Mobin SM, Fiedler J, Urbanos FA, Jiménez-Aparicio R, Kaim W, Lahiri GK. Bis(acetylacetonato)ruthenium Complexes of Noninnocent 1,2-Dioxolene Ligands: Qualitatively Different Bonding in Relation to Monoimino and Diimino Analogues. Chemistry 2011; 17:11030-40. [DOI: 10.1002/chem.201101009] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2011] [Indexed: 11/11/2022]
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10
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Wang JY, Gu W, Wang WZ, Liu X, Liao DZ. Synthesis and characterization of a dinuclear (Hedta)Ru(III) complex. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.596202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Jiang-Yun Wang
- a Weifang Medical College , Weifang City , Shandong Province, 261053 , P.R. China
| | - Wen Gu
- b Department of Chemistry , Nankai University , Tianjin, 300071 , P.R. China
| | - Wen-Zhen Wang
- c Department of Chemistry and Chemical Engineering , Xi’an Shiyou University , Xi’an City , Shanxi Province, 710065 , P.R. China
| | - Xin Liu
- b Department of Chemistry , Nankai University , Tianjin, 300071 , P.R. China
| | - Dai-Zheng Liao
- b Department of Chemistry , Nankai University , Tianjin, 300071 , P.R. China
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11
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Zhang T, Ji C, Wang K, Fortin D, Harvey PD. First Halogen Anion-Bridged (MMX)n-Type One-Dimensional Coordination Polymer Built upon d10−d10 Dimers. Inorg Chem 2010; 49:11069-76. [DOI: 10.1021/ic101619y] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tianle Zhang
- College of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People's Republic of China
| | - Changpeng Ji
- College of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People's Republic of China
| | - Kaili Wang
- College of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People's Republic of China
| | - Daniel Fortin
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Quebec J1K, 2R1, Canada
| | - Pierre D. Harvey
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Quebec J1K, 2R1, Canada
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12
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Barral M, Casanova D, Herrero S, Jiménez-Aparicio R, Torres M, Urbanos F. Tuning the Magnetic Moment of [Ru2(DPhF)3(O2CMe)L]+ Complexes (DPhF=N,N′-Diphenylformamidinate): A Theoretical Explanation of the Axial Ligand Influence. Chemistry 2010; 16:6203-11. [DOI: 10.1002/chem.200903404] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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Imhof W, Sterzik A, Krieck S, Schwierz M, Hoffeld T, Spielberg ET, Plass W, Patmore N. Intramolecular electron transfer in cyanide bridged adducts comprising RuII/RuIII tetracarboxylate and [MnI(CO)(CN)(tBuNC)4] units. Dalton Trans 2010; 39:6249-54. [DOI: 10.1039/b923536a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Cotton FA, Chiarella GM, Dalal NS, Murillo CA, Wang Z, Young MD. Proof by EPR Spectroscopy that the Unpaired Electron in an Os27+ Species Is in a δ* Metal-based Molecular Orbital. Inorg Chem 2009; 49:319-24. [DOI: 10.1021/ic902087e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Gina M. Chiarella
- Department of Chemistry, P.O. Box 30012, Texas A&M University, College Station, Texas 77842-3012 and
| | - Naresh S. Dalal
- Department of Chemistry, Dittmer Building, Florida State University, Tallahassee, Florida, 32306-4390
| | - Carlos A. Murillo
- Department of Chemistry, P.O. Box 30012, Texas A&M University, College Station, Texas 77842-3012 and
| | - Zhenxing Wang
- Department of Chemistry, Dittmer Building, Florida State University, Tallahassee, Florida, 32306-4390
| | - Mark D. Young
- Department of Chemistry, P.O. Box 30012, Texas A&M University, College Station, Texas 77842-3012 and
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15
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Pap JS, Snyder JL, Piccoli PMB, Berry JF. Chloro and azido diruthenium complexes bearing electron-rich N,N',N''-triphenylguanidinate ligands. Inorg Chem 2009; 48:9846-52. [PMID: 19780542 DOI: 10.1021/ic901419w] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of Ru(2)(OAc)(4)Cl with N,N',N''-triphenylguanidine (HTPG) produces one of two different compounds depending on the reaction conditions. In acetone in the presence of triethyl amine, the reaction produces tri-substituted Ru(2)(TPG)(3)(OAc)Cl, and in refluxing xylene, the tetra-substituted Ru(2)(TPG)(4)Cl is produced. Both of these new complexes can be cleanly converted into their corresponding azido analogues by reaction with sodium azide in methanol. The X-ray crystal structures of Ru(2)(TPG)(3)(OAc)Cl, Ru(2)(TPG)(3)(OAc)N(3), and Ru(2)(TPG)(4)Cl are presented, along with magnetic, electrochemical, and spectral measurements for each compound. Studies in solution show that, in contrast to Ru(2)(TPG)(3)(OAc)Cl, Ru(2)(TPG)(4)Cl is sterically hindered at the axial positions, and readily dissociates a chloride ion at high ionic strength. Equilibrium constants for chloride association and dissociation have been estimated. Mass spectrometric data suggest that the two azido complexes are precursors to new diruthenium nitrido species.
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Affiliation(s)
- József S Pap
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, USA
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16
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Chaia ZD, Rusjan MC, Castro MA, Donnio B, Heinrich B, Guillon D, Baggio RF, Cukiernik FD. Supramolecular architecture elucidation of the room temperature columnar mesophases exhibited by mixed-valent diruthenium alkoxybenzoates. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b900779b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Welte L, González-Prieto R, Olea D, Torres MR, Priego JL, Jiménez-Aparicio R, Gómez-Herrero J, Zamora F. Time-dependence structures of coordination network wires in solution. ACS NANO 2008; 2:2051-2056. [PMID: 19206451 DOI: 10.1021/nn800439v] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We present a mechanochemistry-based procedure to isolate individual chains on surfaces of a ruthenium MMX polymer. After sonication of solutions containing the two building blocks of the mentioned MMX polymer, time-depending structures are formed in the solution. The architecture of the different structures obtained in this process, as a function of the time, is monitored using atomic force microscopy. The resulting structures exhibit uniform subnanometer diameters over microns length, in agreement with the expected diameter for an individual polymer chain. From the atomic force microscope images, we infer a long persistence length for the linear structures. Finally, the effect of the temperature solution in the formation of the different structures is also addressed.
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Affiliation(s)
- Lorena Welte
- Departamento de Quimica Inorganica, Universidad Autonoma de Madrid, 28049 Madrid, Spain
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18
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Castro MA, Roitberg AE, Cukiernik FD. Theoretical and experimental studies of diruthenium tetracarboxylates structure, spectroscopy, and electrochemistry. Inorg Chem 2008; 47:4682-90. [PMID: 18459726 DOI: 10.1021/ic702505z] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Quantum mechanical calculations at the density functional theory (DFT) level have been performed on diruthenium tetracarboxylates of different levels of molecular complexity: from unsolvated monomers to oligomers. The agreement between the calculated and experimental molecular structures and vibrational modes of the simple [Ru2(micro-O2CCH3)4]0/+ and [Ru2(micro-O2CCH3)4(H2O)2]0/+ systems made us confident in our calculation methodology. Therefore, it has been applied to the analysis of two different kinds of properties of these compounds: the trends in the UV/vis spectroscopy and electrochemistry along the [Ru2(micro-O2CCH3)4X2]- (X=Cl-, Br-, I-) series, and the crystalline polymorphism related to the polymeric strand conformation in extended Ru2(micro-O2CR)4Cl compounds. For the [Ru2(micro-O2CCH3)4X2]- series, we report new spectroscopic and electrochemical results and interpret the trends on the basis of time dependent DFT-polarized continuum model calculations, local charge and spin analysis, and X donor properties. As far as the polymeric conformation is concerned, it has been previously suggested that the Ru-Cl-Ru angle results from a compromise between packing, orbital overlap, and microsegregation. Our calculations on [Ru2(micro-O2CCH3)4Cl]2Cl- and [Ru2(micro-O2CCH3)4Cl]3Cl- oligomers provide insights on the influence of the first two factors on the strand conformation and allows a suggestion on what is the equatorial aliphatic chain's influence on this issue.
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Affiliation(s)
- Maria Ana Castro
- INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pab. II, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
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Monakhov KY, Stromnova TA. A quantum-chemical study of donor-acceptor properties of carboxylic acids and their anions and evaluation of the effect of these properties on geometric and spectroscopic parameters of palladium(II) carboxylates. RUSS J GEN CHEM+ 2007. [DOI: 10.1134/s1070363207110096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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20
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MIKURIYA M, YOSHIOKA D, HANDA M. Magnetic interactions in one-, two-, and three-dimensional assemblies of dinuclear ruthenium carboxylates. Coord Chem Rev 2006. [DOI: 10.1016/j.ccr.2006.01.011] [Citation(s) in RCA: 162] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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Barral MC, Gallo T, Herrero S, Jiménez-Aparicio R, Torres MR, Urbanos FA. Equatorially Connected Diruthenium(II,III) Units toward Paramagnetic Supramolecular Structures with Singular Magnetic Properties. Inorg Chem 2006; 45:3639-47. [PMID: 16634596 DOI: 10.1021/ic052174t] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of Ru2Cl(O2CMe)(DPhF)3 (DPhF = N,N'-diphenylformamidinate) with mono- and polycarboxylic acids gives a clean substitution of the acetate ligand, leading to the formation of complexes Ru2Cl(O2CC6H5)(DPhF)3 (1), Ru2Cl(O2CC6H4-p-CN)(DPhF)3 (2), [Ru2Cl(DPhF)3(H2O)]2(O2C)2 (3), [Ru2Cl(DPhF)3]2[C6H4-p-(CO2)2] (4), and [Ru2Cl(DPhF)3]3[C6H3-1,3,5-(CO2)3] (5). The preparation of [Ru2(NCS)(DPhF)3]3[C6H3-1,3,5-(CO2)3] (6) and {[Ru2(DPhF)3(H2O)]3[C6H3-1,3,5-(CO2)3]}(SO3CF3)3 (7) from 5 is also described. All complexes are characterized by elemental analysis, IR and electronic spectroscopy, mass spectrometry, cyclic voltammetry, and variable-temperature magnetic measurements. The crystal structure determinations of complexes 2.0.5THF and 3.THF.4H2O (THF = tetrahydrofuran) are reported. The reactions carried out demonstrate the high chemical stability of the fragment [Ru2(DPhF)3]2+, which is preserved in all tested experimental conditions. The stability of this fragment is also corroborated by the mass spectra. Electrochemical measurements reveal in all complexes one redox process due to the equilibrium Ru2(5+) <--> Ru2(6+). In the polynuclear complex 7, some additional oxidation processes are also observed that have been ascribed to the presence of two types of dimetallic units rather than two consecutive reversible oxidations. The magnetic behavior toward temperature for complexes 1-7 from 300 to 2 K is analyzed. Complexes 1-7 show low values of antiferromagnetic coupling in accordance with the molecular nature in 1 and 2 and the absence of important antiferromagnetic interaction through the carboxylate bridging ligands in 3-7, respectively. In addition, the magnetic properties of complex 7 do not correspond to any magnetic behavior described for diruthenium(II,III) complexes. The experimental data of compound 7 are simulated considering a physical mixture of S = 1/2 and 3/2 spin states. This magnetic study demonstrates the high sensitivity of the electronic configuration of the unit [Ru2(DPhF)3]2+ to small changes in the nature of the axial ligands. Finally, the energy gap between the pi and delta orbitals in these types of compounds allows the tentative assignment of the transition pi --> delta.
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Affiliation(s)
- M Carmen Barral
- Departamento de Química Inorganica and Centro de Asistencia a la Investigación de Rayos X, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria, 28040 Madrid, Spain
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Miyasaka H, Izawa T, Takaishi S, Sugimoto K, Sugiura KI, Yamashita M. Metal–Metal Bonded Diruthenium Unit Axial-Capped by Di-tert-butylphenolate: [Ru2(O2CCH3)2(t-Busal-R′py)2]−(t-Busal-R′py2−=N-(R′-2-pyridyl)-2-oxido-3,5-di-tert-butylbenzylaminato; R′ = H, 4-Me, and 5-Me). BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2006. [DOI: 10.1246/bcsj.79.612] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Sugiura T, Ota K, Ebihara M, Kawamura T. 2D sheet frameworks constructed from a diruthenium paddlewheel complex and hexamolybdenum halide clusters. CR CHIM 2005. [DOI: 10.1016/j.crci.2005.03.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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24
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Barral MC, González-Prieto R, Jiménez-Aparicio R, Priego JL, Royer EC, Torres MR, Urbanos FA. Tetra(3-methoxypropionato)diruthenium(II, III) Units: Supramolecular Organization in the Complex [Ru2(μ-O2CCH2CH2OMe)4(H2O)2]BF4. Z Anorg Allg Chem 2005. [DOI: 10.1002/zaac.200570017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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25
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Arribas G, Barral MC, González-Prieto R, Jiménez-Aparicio R, Priego JL, Torres MR, Urbanos FA. Discrete and Monodimensional Heteropolynuclear Structures Formed by Tetracarboxylatodiruthenium(II,III) and Perrhenato Fragments. Inorg Chem 2005; 44:5770-7. [PMID: 16060629 DOI: 10.1021/ic050757x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reaction between cationic units of carboxylate-bridged diruthenium complexes [Ru(2)(mu-O(2)CR)(4)](+) (R = Me, CMePh(2), CMe(3), CH(2)CH(2)OMe, C(Me)=CHEt, C(6)H(4)-p-OMe, Ph) and tetrabutylammonium perrhenate gives complexes with different arrangements in the solid state. Thus, the compounds Ru(2)(mu-O(2)CR)(4)(ReO(4)) [R = Me (1), CMePh(2) (2), CMe(3) (3), CH(2)CH(2)OMe (4), C(Me)=CHEt (5), C(6)H(4)-p-OMe (6), Ph (7)] have polymeric structures with the diruthenium units linked by perrhenate ligands in the axial positions. The structures of complexes 3.THF and 4 were established by single-crystal X-ray diffraction. The tetrahedral geometry of the ReO(4)(-) anion permits the formation of a chain close to the linearity. In contrast to the polymeric chains observed in complexes 1-7, the reaction of [Ru(2)(mu-O(2)CPh)(4)](+) with NBu(4)ReO(4) also affords the compounds Ru(2)(mu-O(2)CPh)(4)(ReO(4))(H(2)O) (8) and NBu(4)[Ru(2)(mu-O(2)CPh)(4)(ReO(4))(2)] (9) depending on the reaction conditions. The structure of 8 consists of cationic and anionic units, [Ru(2)(mu-O(2)CPh)(4)(H(2)O)(2)](+) and [Ru(2)(mu-O(2)CPh)(4)(ReO(4))(2)](-), linked by hydrogen bonds, which give a three-dimensional net. The structure of complex 9.0.5H(2)O has an anionic unit similar to that of 8, whose counterion is NBu(4)(+). The Ru-Ru bond distances are slightly longer in [Ru(2)(mu-O(2)CPh)(4)(ReO(4))(2)](-) than in the polymeric compounds Ru(2)(mu-O(2)CR)(4)(ReO(4)). The magnetic behavior owes to the existence of zero-field splitting (ZFS) and a weak antiferromagnetic coupling. The experimental data are fitted with a model that considers the ZFS effect using the Hamiltonian (D) = SDS. The weak antiferromagnetic coupling is introduced as a perturbation, using the molecular field approximation.
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Affiliation(s)
- Gema Arribas
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense, Ciudad Universitaria, Madrid, Spain
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Shi YH, Chen WZ, John KD, Da Re RE, Cohn JL, Xu GL, Eglin JL, Sattelberger AP, Hare CR, Ren T. Diosmium(III) Compounds Supported by 2-Anilinopyridinate and Novel Alkynyl Derivatives. Inorg Chem 2005; 44:5719-27. [PMID: 16060623 DOI: 10.1021/ic050496r] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction between Os(2)(OAc)(4)Cl(2) and Hap (Hap is 2-anilinopyridine) under prolonged refluxing conditions resulted in an Os(III)(2) compound, Os(2)(ap)(4)Cl(2) (1), that can be crystallized as either the cis-(2,2) isomer from a CH(3)OH-CH(2)Cl(2) solution or the (3,1) isomer from a hexanes-CH(2)Cl(2) solution. Compound 1 undergoes facile reactions with LiC(2)Y to yield a series of Os(2)(ap)(4)(C(2)Y)(2) compounds with Y as Ph (2), ferrocenyl (3), SiMe(3) (4), and C(2)SiMe(3) (5). X-ray diffraction study of compound 2 reveals solvent-dependent isomerism similar to that of the parent compound 1. Compound 1 has Os-Os distances of 2.3937(8) and 2.3913(8) Angstroms for the cis-(2,2) and (3,1) isomers, respectively, and is paramagnetic (S = 1). Both the ethynyl derivatives 2-4 and butadiynyl derivative 5 are diamagnetic and have Os-Os distances of 2.456(1), 2.471(1), and 2.481(1) Angstroms for the cis-(2,2) and (3,1) isomers of 2 and (3,1) isomer of 4, respectively. Compounds 1-5 exhibit multiple one-electron redox couples in their cyclic voltammograms, including a reversible Os(2)(8+/7+) couple for 2. Resonance Raman spectra of both compounds 1 and 2 are reported.
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Affiliation(s)
- Yan-Hui Shi
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, USA
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27
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Yi XY, Liu B, Jiménez-Aparicio R, Urbanos FA, Gao S, Xu W, Chen JS, Song Y, Zheng LM. Syntheses, Structures, and Magnetic Properties of Mixed-Valent Diruthenium(II,III) Diphosphonates with Discrete and One-Dimensional Structures. Inorg Chem 2005; 44:4309-14. [PMID: 15934761 DOI: 10.1021/ic048340z] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Four mixed-valent ruthenium diphosphonates, namely, Na(4)[Ru(2)(hedp)(2)X]x16H(2)O [X = Cl (1), Br (2)], K(3)[Ru(2)(hedp)(2)(H(2)O)(2)]x6H(2)O (3), and Na(7)[Ru(2)(hedp)(2)Fe(CN)(6)]x24H(2)O (4), where hedp represents 1-hydroxyethylidenediphosphonate [CH(3)C(OH)(PO(3))(2)](4-), were synthesized and structurally characterized. Compounds 1, 2, and 4 show linear chain structures in which the mixed-valent [Ru(2)(hedp)(2)](3-) dimers are linked by X(-) or [Fe(CN)(6)](4-) bridges. Compound 3 contains discrete species of [Ru(2)(hedp)(2)(H(2)O)(2)](3-) where the axial positions of [Ru(2)(hedp)(2)](3-) paddlewheel are terminated by water molecules. Magnetic studies show that significant antiferromagnetic exchanges are mediated between the [Ru(2)(hedp)(2)](3-) (S = 3/2) units through halide bridges in compounds 1 and 2.
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Affiliation(s)
- Xiao-Yi Yi
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, Nanjing University, Nanjing 210093, P. R. China
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Kar S, Chanda N, Mobin SM, Urbanos FA, Niemeyer M, Puranik VG, Jimenez-Aparicio R, Lahiri GK. Unusual Monodentate Binding Mode of 2,2‘-Dipyridylamine (L) in Isomeric trans-(acac)2RuII(L)2, trans-[(acac)2RuIII(L)2]ClO4, and cis-(acac)2RuII(L)2 (acac = Acetylacetonate). Synthesis, Structures, and Spectroscopic, Electrochemical, and Magnetic Aspects. Inorg Chem 2005; 44:1571-9. [PMID: 15733000 DOI: 10.1021/ic049219v] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction of cis-Ru(acac)2(CH3CN)2 (acac = acetylacetonate) with 2,2'-dipyridylamine (L) in ethanolic medium resulted in facile one-pot synthesis of stable [(acac)2RuIII(L)]ClO4 ([1]ClO4), trans-[(acac)2RuII(L)2] (2), trans-[(acac)2RuIII)L)2]ClO4 ([2]ClO4), and cis-[(acac)2RuII(L)2] (3). The bivalent congener 1 was generated via electrochemical reduction of [1]ClO4. Although in [1]+ the dipyridylamine ligand (L) is bonded to the metal ion in usual bidentate fashion, in 2/[2]+ and 3, the unusual monodentate binding mode of L has been preferentially stabilized. Moreover, in 2/[2]+ and 3, two such monodentate L's have been oriented in the trans- and cis-configurations, respectively. The binding mode of L and the isomeric geometries of the complexes were established by their single-crystal X-ray structures. The redox stability of the Ru(II) state follows the order 1 < 2 << 3. In contrast to the magnetic moment obtained for [1]ClO4, mu = 1.84 muB at 298 K, typical for low-spin Ru(III) species, the compound [2]ClO4 exhibited an anomalous magnetic moment of 2.71 muB at 300 K in the solid state. The variable-temperature magnetic measurements showed a pronounced decrease of the magnetic moment with the temperature, and that dropped to 1.59 muB at 3 K. The experimental data can be fitted satisfactorily using eq 2 that considered nonquenched spin-orbit coupling and Weiss constant in addition to the temperature-independent paramagnetism. [1]ClO4 and [2]ClO4 displayed rhombic and axial EPR spectra, respectively, in both the solid and the solution states at 77 K.
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Affiliation(s)
- Sanjib Kar
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400076, India
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Barral M, González-Prieto R, Herrero S, Jiménez-Aparicio R, Priego J, Torres M, Urbanos F. Anionic dihalotetraacetatodiruthenium(II,III) compounds. Polyhedron 2005. [DOI: 10.1016/j.poly.2004.11.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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30
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Hitting Two Birds with One Stone: Crystal Containing Both Disproportionation Products of the Mixed-Valence Ruthenium(II, III) Carboxylate. J CLUST SCI 2004. [DOI: 10.1007/s10876-004-5767-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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31
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Barral M, González-Prieto R, Jiménez-Aparicio R, Priego J, Torres M, Urbanos F. Synthesis, Properties, and Structural Characterization of Bromo- and Iodotetracarboxylatodiruthenium(II,III) Compounds. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200400377] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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32
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Furukawa S, Kitagawa S. Neutral Paddlewheel Diruthenium Complexes with Tetracarboxylates of Large π-Conjugated Substituents: Facile One-Pot Synthesis, Crystal Structures, and Electrochemical Studies. Inorg Chem 2004; 43:6464-72. [PMID: 15446898 DOI: 10.1021/ic0493752] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A one-pot reaction of a cationic diruthenium complex, [Ru(2)(II,III)(O(2)CCH(3))(4)(THF)(2)](BF(4)), with arylcarboxylic acids, ArCO(2)H, (PhCO(2)H = benzoic acid, NapCO(2)H = 1-naphthoic acid, AntCO(2)H = 9-anthracenecarboxylic acid) in NDMA (NDMA = N,N-dimethylaniline) has led to isolation of neutral paddlewheel-type diruthenium complexes, [Ru(II)(2)(O(2)CAr)(4)(THF)(2)] (Ar = Ph (1), Nap (2), Ant (3)). Paramagnetic variable temperature (VT) (1)H NMR studies and GC-MS studies show that the reaction consists of two steps: a one-electron reduction of the Ru(2) core by NDMA and a simple carboxylate-exchange reaction. All compounds 1-3 were structurally characterized by X-ray crystallography. While the structural features of the Ru(2) core are very similar in all the compounds, the dihedral angles between the carboxylate plane and the aromatic ring are larger with the expanding of aryl groups from phenyl to anthracene. The effect of pi-pi stacking leads to the formation of a 1-D chain structure in compound 3, whereas compounds 1 and 2 are fully isolated from each other. The electrochemical measurements show that the quasireversible one-electron oxidation step is observed at +0.06, +0.09, and +0.17 V (vs Ag/Ag(+)) for 1-3, respectively, assigned to the Ru(II)(2)/Ru(II,III)(2) redox couple. These potentials are found to demonstrate a linear relationship with the substituent constants for aryl compounds,.
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Affiliation(s)
- Shuhei Furukawa
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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Kar S, Chanda N, Mobin SM, Datta A, Urbanos FA, Puranik VG, Jimenez-Aparicio R, Lahiri GK. Diruthenium Complexes [{(acac)2RuIII}2(μ-OC2H5)2], [{(acac)2RuIII}2(μ-L)](ClO4)2, and [{(bpy)2RuII}2(μ-L)](ClO4)4 [L = (NC5H4)2−N−C6H4−N−(NC5H4)2, acac = Acetylacetonate, and bpy = 2,2‘-Bipyridine]. Synthesis, Structure, Magnetic, Spectral, and Photophysical Aspects. Inorg Chem 2004; 43:4911-20. [PMID: 15285667 DOI: 10.1021/ic0498900] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Paramagnetic diruthenium(III) complexes (acac)(2)Ru(III)(mu-OC(2)H(5))(2)Ru(III)(acac)(2) (6) and [(acac)(2)Ru(III)(mu-L)Ru(III)(acac)(2)](ClO(4))(2), [7](ClO(4))(2), were obtained via the reaction of binucleating bridging ligand, N,N,N',N'-tetra(2-pyridyl)-1,4-phenylenediamine [(NC(5)H(4))(2)-N-C(6)H(4)-N-(NC(5)H(4))(2), L] with the monomeric metal precursor unit (acac)(2)Ru(II)(CH(3)CN)(2) in ethanol under aerobic conditions. However, the reaction of L with the metal fragment Ru(II)(bpy)(2)(EtOH)(2)(2+) resulted in the corresponding [(bpy)(2)Ru(II) (mu-L) Ru(II)(bpy)(2)](ClO(4))(4), [8](ClO(4))(4). Crystal structures of L and 6 show that, in each case, the asymmetric unit consists of two independent half-molecules. The Ru-Ru distances in the two crystallographically independent molecules (F and G) of 6 are found to be 2.6448(8) and 2.6515(8) A, respectively. Variable-temperature magnetic studies suggest that the ruthenium(III) centers in 6 and [7](ClO(4))(2) are very weakly antiferromagnetically coupled, having J = -0.45 and -0.63 cm(-)(1), respectively. The g value calculated for 6 by using the van Vleck equation turned out to be only 1.11, whereas for [7](ClO(4))(2), the g value is 2.4, as expected for paramagnetic Ru(III) complexes. The paramagnetic complexes 6 and [7](2+) exhibit rhombic EPR spectra at 77 K in CHCl(3) (g(1) = 2.420, g(2) = 2.192, g(3) = 1.710 for 6 and g(1) = 2.385, g(2) = 2.177, g(3) = 1.753 for [7](2+)). This indicates that 6 must have an intermolecular magnetic interaction, in fact, an antiferromagnetic interaction, along at least one of the crystal axes. This conclusion was supported by ZINDO/1-level calculations. The complexes 6, [7](2+), and [8](4+) display closely spaced Ru(III)/Ru(II) couples with 70, 110, and 80 mV separations in potentials between the successive couples, respectively, implying weak intermetallic electrochemical coupling in their mixed-valent states. The electrochemical stability of the Ru(II) state follows the order: [7](2+) < 6 < [8](4+). The bipyridine derivative [8](4+) exhibits a strong luminescence [quantum yield (phi) = 0.18] at 600 nm in EtOH/MeOH (4:1) glass (at 77 K), with an estimated excited-state lifetime of approximately 10 micros.
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Affiliation(s)
- Sanjib Kar
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400076, India
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Aquino MA. Recent developments in the synthesis and properties of diruthenium tetracarboxylates. Coord Chem Rev 2004. [DOI: 10.1016/j.ccr.2004.06.016] [Citation(s) in RCA: 150] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Dicarboxylato-bridged diruthenium units in two different oxidation states: the first step towards the synthesis of Creutz–Taube analogs with dinuclear Ru2n+ species. INORG CHEM COMMUN 2004. [DOI: 10.1016/j.inoche.2003.09.012] [Citation(s) in RCA: 43] [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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36
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Miyasaka H, Izawa T, Sugiura KI, Yamashita M. A family of diruthenium compounds with dianionic tridentate ligands of N-(2-pyridyl)-2-oxy-5-R-benzylaminate (R = H, Me, Cl, Br, NO(2)): isolation, structure determination, and electrochemistry. Inorg Chem 2003; 42:7683-90. [PMID: 14606867 DOI: 10.1021/ic034625k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The ligand substitution reaction of Ru(2)(O(2)CCH(3))(4)Cl with 5-substituted N-(2-pyridyl)-2-oxy-5-R-benzylaminate (R = H, Me, Cl, Br, NO(2)) resulted in a family of anionic diruthenium species of [Ru(2)(O(2)CCH(3))(2)(R-salpy)(2)](-) that were isolated by using Na(+)- or K(+)-18-crown-6-ether as the countercation: [A(18-crown-6)(S)(x)()][Ru(2)(O(2)CCH(3))(2)(R-salpy)(2)] (A = Na(+), K(+); S = solvent; R = H, 1; Me, 2; Cl, 3; Br, 4; NO(2), 5). All compounds were structurally characterized by X-ray crystallography. The structural features of the anionic parts are very similar among the compounds: two acetate and two R-salpy(2)(-) ligands are, respectively, located around the Ru(2) unit in a trans fashion, where the R-salpy(2)(-) ligand acts as a tridentate ligand having both bridging and chelating characters to form the M-M bridging/axial-chelating mode. Compounds 1 and 5 with K(+)-18-crown-6-ether have one-dimensional chain structures, the K(+)-18-crown-6-ether interacting with phenolate oxygens of the [Ru(2)(O(2)CCH(3))(2)(R-salpy)(2)](-) unit to form a repeating unit, [.K.O-Ru-Ru-O.], whereas 2-4 are discrete. Cyclic voltammetry and differential pulse voltammetry revealed systematic redox activities based on the dimetal center and the substituted ligand, obeying the Hammett law with the reaction constants per substituent, rho, for the redox processes being 127 mV for Ru(2)(5+)/Ru(2)(4+), 185 mV for Ru(2)(6+)/Ru(2)(5+), 92 mV for Ru(2)(7+)/Ru(2)(6+), and 179 mV for R-salpy(-)/R-salpy(2)(-). For 3, the singly oxidized and reduced species, Ru(2)(6+) and Ru(2)(4+), respectively, generated by bulk controlled-potential electrolyses were finally monitored by spectroscopy. The singly oxidized species can also be slowly generated by air oxidation.
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Affiliation(s)
- Hitoshi Miyasaka
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo 192-03, Japan.
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Barral M, González-Prieto R, Jiménez-Aparicio R, Priego J, Torres M, Urbanos F. Polymeric, Molecular, and Cation/Anion Arrangements in Chloro-, Bromo-, and Iododiruthenium(II,III) Carboxylate Compounds. Eur J Inorg Chem 2003. [DOI: 10.1002/ejic.200300010] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Sayama Y, Handa M, Mikuriya M, Hiromitsu I, Kasuga K. Syntheses and Magnetic Properties of Ruthenium(II,III) Pivalate Dimers Axially Coordinated by Nitronyl Nitroxide Radicals [Ru2(O2CCMe3)4(L)2]BF4and [{Ru2(O2CCMe3)4(L)2}{Ru2(O2CCMe3)4(H2O)2}]n(BF4)2n, L = 2,4,4,5,5-Pentamethyl-4,5-dihydro-1H-imidazol-1-oxyl-3-N-oxide and 2-Ethyl-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl-3-N-oxide. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2003. [DOI: 10.1246/bcsj.76.769] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Zhang LY, Chen JL, Shi LX, Chen ZN. Utilizing Diruthenium Components for the Design of Cyanide-Linked Tri- and Tetranuclear Organometallic Complexes with Multistep One-Electron Redox Processes. Organometallics 2002. [DOI: 10.1021/om0203983] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li-Yi Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China, State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
| | - Jing-Lin Chen
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China, State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
| | - Lin-Xi Shi
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China, State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
| | - Zhong-Ning Chen
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China, State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
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Yang Z, Ebihara M, Kawamura T, Okubo T, Mitani T. An infinite zigzag chain of the halide-bridged tetrakis(acetamidato)dirhodium cation radical. Inorganica Chim Acta 2001. [DOI: 10.1016/s0020-1693(01)00519-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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41
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Synthesis of diruthenium(II,III) amidate compounds. Crystal structure of [Ru2(μ-HNOCC4H3S)4(thf)2]SbF6·0.5cyclohexane. Polyhedron 2001. [DOI: 10.1016/s0277-5387(01)00850-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Miyasaka H, Clérac R, Campos-Fernández CS, Dunbar KR. Metal-metal bonded diruthenium(II, III) assemblies with the polycyano anionic linkers N(CN)2-, C(CN)3-, and 1,4-dicyanamido-2,5-dimethylbenzene (DM-dicyd2-): syntheses, structures, and magnetic properties. Inorg Chem 2001; 40:1663-71. [PMID: 11261977 DOI: 10.1021/ic001183t] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The new metal-metal bonded diruthenium(II,III) compounds [Ru2(O2CCH3)4(mu-L)]infinity (L = N(CN)2-, 1; C(CN)3-, 2) and [[Ru2(O2CCH3)2(mhp)2]2(mu-DM-Dicyd)] (3) (mhp = 2-oxy-6-methylpyridinate, DM-Dicyd = 1,4-dicyanamido-2,5-dimethylbenzene dianion) have been synthesized and fully characterized. Compounds 1 and 2 were synthesized by the reaction of [Ru2(O2CCH3)4(NCCH3)2](BF4) with NaN(CN)2 and KC(CN)3, respectively. The "dimer-of-dimers", 3, was synthesized by a 2:1 reaction of [Ru2(O2CCH3)2(mhp)2(MeOH)](BF4) with [As(Ph)4]2[DM-Dicyd]. Compound 1 crystallizes in the monoclinic space group C2/m with a = 10.174(2) A, b = 13.016(3) A, c = 7.0750(14) A, beta = 101.83(3) degrees, and Z = 2. Compound 2 crystallizes in the orthorhombic space group Fdd2 with a = 29.679(6) A, b = 31.409(6) A, c = 7.3660(15) A, V = 6866(2) A3, and Z = 16. In compound 1, dicyanamide anions (N(CN)2-) bridge the [Ru2(O2CCH3)4]+ units in an end-to-end bridging mode, thereby forming an alternating one-dimensional chain. In compound 2, two cyano groups of tricyanomethanide anion (C(CN)3-) are coordinated to independent [Ru2(O2CCH3)4]+ units to give a chain similar to that found in 1. The Ru-Ru bond distances in 1 and 2 are 2.2788(14) and 2.2756(5) A, respectively, which are typical values for Ru2(O2CR)4Cl and [Ru2(O2CR)4]+ compounds. The Ru-N distances are 2.257(8) A in 1 and 2.259(4) and 2.283(4) A in 2. The temperature dependence of the magnetic susceptibilities of compounds 1-3 reveals a weak antiferromagnetic interaction between Ru2 units (S = 3/2) through each polycyano anionic linker: g = 2.16, zJ = -0.33 cm(-1), D = 63.3 cm(-1) for 1; g = 2.15, zJ = -0.22 cm(-1), D = 58.0 cm(-1) for 2; and g = 2.10, zJ = -0.90 cm(-1), D = 75.0 cm(-1) for 3.
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Affiliation(s)
- H Miyasaka
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, USA
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Jiménez-Aparicio R, Urbanos FA, Arrieta JM. Magnetic properties of diruthenium(II,III) carboxylate compounds with large zero-field splitting and strong antiferromagnetic coupling. Inorg Chem 2001; 40:613-9. [PMID: 11225101 DOI: 10.1021/ic0001154] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The magnetic properties of mixed-valent compounds of general formula Ru2Cl(mu-O2CR)4 [R = CH2-CH3 (1), C(Me)=CHEt) (2)] have been studied in the 2-300 K temperature range. This magnetic study also includes a revision of the magnetic properties of the complex Ru2Cl(mu-O2CCMePh2)4 (3). Compounds 1-3 show a linear structure and a strong antiferromagnetic coupling between the diruthenium units through the chlorine atoms according to previous studies. Two fitting models to explain the magnetic properties of these complexes that incorporate a large zero-field splitting together with a strong antiferromagnetic coupling are described. These models consider that each diruthenium unit (S = 3/2) is magnetically coupled to the nearest diruthenium unit and ignores the longer distance magnetic coupling. The fitting models were found to be successful in fitting the magnetic data of the linear diruthenium(II,III) complexes. The zero-field splitting, D, and the antiferromagnetic coupling, zJ, vary from 37.8 to 48.0 cm-1 and from -7.43 to -13.30 cm-1, respectively, for complexes. The D values are similar to those calculated for the nonlinear diruthenium(II,III) compounds and confirm the validity of the proposed fitting models.
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Affiliation(s)
- R Jiménez-Aparicio
- Departamento de Química Inorgánica and Sección Departamental de Matemática Aplicada, Facultad de Ciencias Químicas, Universidad Complutense, Ciudad Universitaria, 28040 Madrid, Spain.
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