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Nitronyl-nitroxide PCP-pincer complexes of palladium and nickel: synthesis and an EPR study. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3560-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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2
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Kira S, Miyamae T, Yoshida K, Kanzaki Y, Sugisaki K, Shiomi D, Sato K, Takui T, Suzuki S, Kozaki M, Okada K. Aurophilic Interactions in Multi-Radical Species: Electronic-Spin and Redox Properties of Bis- and Tris-[(Nitronyl Nitroxide)-Gold(I)] Complexes with Phosphine-Ligand Scaffolds. Chemistry 2021; 27:11450-11457. [PMID: 34038598 DOI: 10.1002/chem.202101483] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Indexed: 01/23/2023]
Abstract
Multinuclear AuI complexes with two or three nitronyl nitroxide-2-ide radical anion and phosphine-ligand scaffolds, (NN-Au)2 -1 o, (NN-Au)2 -1 m, and (NN-Au)2 -1 p, have been synthesized to investigate the influence of AuI -AuI (aurophilic) interactions on the properties of multispin molecular systems. The desired complexes were successfully prepared in moderate yields in a one-pot synthesis from the corresponding phosphine ligand, AuI source, parent NN, and sodium hydroxide. Among the prepared complexes, (NN-Au)2 -1 o, in which an aurophilic interaction was clearly observed by crystal structure analysis, showed characteristic spin-spin interactions, electrochemical properties, and solvatochromic behavior. The results from theoretical calculations also suggested that the differences in properties between complex (NN-Au)2 -1 o and the other complexes are due to intramolecular aurophilic interactions.
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Affiliation(s)
- Sayaka Kira
- Graduate School of Science, Osaka City University Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan
| | - Takayuki Miyamae
- Graduate School of Science, Osaka City University Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan
| | - Kohei Yoshida
- Graduate School of Science, Osaka City University Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan
| | - Yuki Kanzaki
- Graduate School of Science, Osaka City University Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan
| | - Kenji Sugisaki
- Graduate School of Science, Osaka City University Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan
| | - Daisuke Shiomi
- Graduate School of Science, Osaka City University Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan
| | - Kazunobu Sato
- Graduate School of Science, Osaka City University Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan
| | - Takeji Takui
- Graduate School of Science, Osaka City University Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan
| | - Shuichi Suzuki
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Masatoshi Kozaki
- Graduate School of Science, Osaka City University Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan.,Osaka City University Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan
| | - Keiji Okada
- Graduate School of Science, Osaka City University Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan.,Osaka City University Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan
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Romanenko GV, Fokin SV, Bogomyakov AS, Ovcharenko VI. STRUCTURE OF A Pd–ORGANIC PARAMAGNETIC. J STRUCT CHEM+ 2020. [DOI: 10.1134/s0022476620120136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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4
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Tanimoto R, Yamada K, Suzuki S, Kozaki M, Okada K. Group 11 Metal Complexes Coordinated by the (Nitronyl Nitroxide)-2-ide Radical Anion: Facile Oxidation of Stable Radicals Controlled by Metal-Carbon Bonds in Radical-Metalloids. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800038] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Ryu Tanimoto
- Graduate School of Science; Osaka City University; 558-8585 Osaka Osaka Prefecture Japan
| | - Kiyomi Yamada
- Graduate School of Science; Osaka City University; 558-8585 Osaka Osaka Prefecture Japan
| | - Shuichi Suzuki
- Graduate School of Science; Osaka City University; 558-8585 Osaka Osaka Prefecture Japan
| | - Masatoshi Kozaki
- Graduate School of Science; Osaka City University; 558-8585 Osaka Osaka Prefecture Japan
| | - Keiji Okada
- Graduate School of Science; Osaka City University; 558-8585 Osaka Osaka Prefecture Japan
- The Osaka City University Advanced Research Institute for Natural Science and Technology (OCARINA); 558-8585 Osaka Osaka Prefecture Japan
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5
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Suzuki S, Kira S, Kozaki M, Yamamura M, Hasegawa T, Nabeshima T, Okada K. An efficient synthetic method for organometallic radicals: structures and properties of gold(i)-(nitronyl nitroxide)-2-ide complexes. Dalton Trans 2017; 46:2653-2659. [DOI: 10.1039/c6dt04685a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
One-pot synthesis of (nitronyl nitroxide)-gold(i)-phosphine (NN-Au-P) complexes has been developed using chloro(tetrahydrothiophene)gold(i), phosphine ligands, nitronyl nitroxide radicals, and sodium hydroxide.
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Affiliation(s)
- Shuichi Suzuki
- Graduate School of Science
- Osaka City University
- Osaka
- Japan
- Graduate School of Engineering Science
| | - Sayaka Kira
- Graduate School of Science
- Osaka City University
- Osaka
- Japan
| | | | - Masaki Yamamura
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS)
- University of Tsukuba
- Tsukuba
- Japan
| | - Toru Hasegawa
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS)
- University of Tsukuba
- Tsukuba
- Japan
| | - Tatsuya Nabeshima
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS)
- University of Tsukuba
- Tsukuba
- Japan
| | - Keiji Okada
- Graduate School of Science
- Osaka City University
- Osaka
- Japan
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Suzuki S, Kozaki M, Okada K. π-System Figuration for Open-shell Molecules Based on Nitronyl Nitroxide. J SYN ORG CHEM JPN 2017. [DOI: 10.5059/yukigoseikyokaishi.75.955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shuichi Suzuki
- Graduate School of Engineering Science, Osaka University
| | | | - Keiji Okada
- Graduate School of Science, Osaka City University
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Suzuki S, Wada T, Tanimoto R, Kozaki M, Shiomi D, Sugisaki K, Sato K, Takui T, Miyake Y, Hosokoshi Y, Okada K. Cyclic Triradicals Composed of Iminonitroxide-Gold(I) with Intramolecular Ferromagnetic Interactions. Angew Chem Int Ed Engl 2016; 55:10791-4. [DOI: 10.1002/anie.201604320] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 06/03/2016] [Indexed: 01/09/2023]
Affiliation(s)
- Shuich Suzuki
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
- Graduate School of Engineering Science; Osaka University; Toyonaka Osaka 560-8531 Japan
| | - Tomoyuki Wada
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
| | - Ryu Tanimoto
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
| | - Masatoshi Kozaki
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
| | - Daisuke Shiomi
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
| | - Kenji Sugisaki
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
| | - Kazunobu Sato
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
| | - Takeji Takui
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
| | - Yota Miyake
- Department of Physical Science; Osaka Prefecture University, Naka-ku; Sakai Osaka 599-8531 Japan
| | - Yuko Hosokoshi
- Department of Physical Science; Osaka Prefecture University, Naka-ku; Sakai Osaka 599-8531 Japan
| | - Keiji Okada
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
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Suzuki S, Wada T, Tanimoto R, Kozaki M, Shiomi D, Sugisaki K, Sato K, Takui T, Miyake Y, Hosokoshi Y, Okada K. Cyclic Triradicals Composed of Iminonitroxide-Gold(I) with Intramolecular Ferromagnetic Interactions. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604320] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Shuich Suzuki
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
- Graduate School of Engineering Science; Osaka University; Toyonaka Osaka 560-8531 Japan
| | - Tomoyuki Wada
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
| | - Ryu Tanimoto
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
| | - Masatoshi Kozaki
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
| | - Daisuke Shiomi
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
| | - Kenji Sugisaki
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
| | - Kazunobu Sato
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
| | - Takeji Takui
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
| | - Yota Miyake
- Department of Physical Science; Osaka Prefecture University, Naka-ku; Sakai Osaka 599-8531 Japan
| | - Yuko Hosokoshi
- Department of Physical Science; Osaka Prefecture University, Naka-ku; Sakai Osaka 599-8531 Japan
| | - Keiji Okada
- Graduate School of Science; Osaka City University; 3-3-138, Sumiyoshi-ku Osaka Osaka 558-8585 Japan
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Tolstikov S, Tretyakov E, Fokin S, Suturina E, Romanenko G, Bogomyakov A, Stass D, Maryasov A, Fedin M, Gritsan N, Ovcharenko V. C(sp(2))-coupled nitronyl nitroxide and iminonitroxide diradicals. Chemistry 2015; 20:2793-803. [PMID: 24677167 DOI: 10.1002/chem.201302681] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Revised: 12/03/2013] [Indexed: 11/11/2022]
Abstract
Spin-labelled compounds are widely used in chemistry, physics, biology and the materials sciences but the synthesis of stable high-spin organic molecules is still a challenge. We succeeded in synthesising heteroatom analogues of the 1,1,2,3,3-pentamethylenepropane (PMP) diradicals with two nitronyl nitroxide (DR1) and with two iminonitroxide (DR2) fragments linked through the C(sp2) atom of the nitrone group. According to magnetic susceptibility measurements, EPR data and ab initio calculations at the (8,6)CASSCF and (8,6)NEVPT2 levels, DR1 and DR2 have singlet ground states. The singlet–triplet energy splitting (2J) is low (J/k=−7.4 for DR1 and −6.0 K for DR2), which comes from the disjoint nature of these diradicals. The reaction of [Cu(hfac)2] with DR1 gives rise to different heterospin complexes in which the diradical acts as a rigid ligand, retaining its initial conformation. For the [{Cu(hfac)2}2(DR1)(H2O)] complex, sufficiently strong ferromagnetic interactions (J1/k=42.7 and J2/k=14.1 K) between two coordinating CuII ions and DR1 were revealed. In [{Cu(hfac)2}2(DR1)(H2O)][Cu(hfac)2(H2O)], the very strong and antiferromagnetic (J/k=−416.1 K) exchange interaction between one of the coordinating CuII ions and DR1 is caused by the very short equatorial CuO bond length (1.962 Å).
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Suzuki S, Yokoi H, Kozaki M, Kanzaki Y, Shiomi D, Sato K, Takui T, Okada K. Synthesis and Properties of a Bis[(nitronyl nitroxide)-2-ide radical anion]-Palladium Complex. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402564] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Zhang X, Suzuki S, Kozaki M, Okada K. NCN pincer-Pt complexes coordinated by (nitronyl nitroxide)-2-ide radical anion. J Am Chem Soc 2012; 134:17866-8. [PMID: 23075405 DOI: 10.1021/ja308103g] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
New pincer-Pt complexes coordinated by (nitronyl nitroxide)-2-ide radical anion were prepared as stable compounds in high yields. The structures of these Pt complexes and the oxidized complexes were unequivocally determined by spectral and crystal structure analyses. The oxidation potential of the nitronyl nitroxide moiety in these complexes was shifted in the negative direction by ~0.6 V as a result of coordination to the Pt(II) atom.
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Affiliation(s)
- Xun Zhang
- Department of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
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12
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Petz W, Neumüller B, Klein S, Frenking G. Syntheses and Crystal Structures of [Hg{C(PPh3)2}2][Hg2I6] and [Cu{C(PPh3)2}2]I and Comparative Theoretical Study of Carbene Complexes [M(NHC)2] with Carbone Complexes [M{C(PH3)2}2] (M = Cu+, Ag+, Au+, Zn2+, Cd2+, Hg2+). Organometallics 2011. [DOI: 10.1021/om200145c] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Tretyakov E, Fokin S, Romanenko G, Ikorskii V, Vasilevsky S, Ovcharenko V. 2D and 3D Cu(hfac)2 Complexes with Nitronyl Nitroxide Biradicals. Inorg Chem 2006; 45:3671-8. [PMID: 16634600 DOI: 10.1021/ic060132e] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reactions between Cu(hfac)2 and nitronyl nitroxide biradicals 1,4-bis[4-(4,4,5,5-tetramethyl-3-oxide-1-oxyl-4,5-dihydro-1H-imidazol-2-yl)pyrazol-1-yl]butane (L4) and 1,8-bis[4-(4,4,5,5-tetramethyl-3-oxide-1-oxyl-4,5-dihydro-1H-imidazol-2-yl)pyrazol-1-yl]octane (L8) gave respectively a framework compound [Cu(hfac)2]2L4 and a layered polymer compound [Cu(hfac)2]2L8. The framework of [Cu(hfac)2]2L4 consists of 66-membered condensed metallocycles. Inside the framework, the structure has macrohelixes (pitch approximately 25 A) extending along the [001] crystallographic direction. All the helixes have the same direction of winding; the crystals, therefore, are optically active, the structure corresponding either to P-isomer (P4(1)2(1)2) or to M-isomer (P4(3)2(1)2). The long distances between the Cu atoms and the O atoms of the coordinated >N-O groups (Cu-O 2.351-2.467 A) are responsible for ferromagnetic exchange interactions in Cu2+-O-N< and >N-O-Cu2+-O-N< exchange clusters.
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Affiliation(s)
- Eugene Tretyakov
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia
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