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Bartlett MJ, Frogley BJ, Hill AF, Sharma M, Smith MK, Ward JS. Hydrogenating an organometallic carbon chain: buten-yn-diyl (CH[double bond, length as m-dash]CHC[triple bond, length as m-dash]C) as a missing link. Dalton Trans 2019; 48:16534-16554. [PMID: 31576871 DOI: 10.1039/c9dt03229k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The sequential reaction of [Ru(C[triple bond, length as m-dash]CC[triple bond, length as m-dash]CH)Cl(CO)2(PPh3)2] with [Ru(CO)2(PPh3)3], and N-chlorosuccinimide affords the binuclear tetracarbido complex [Ru2(μ-C[triple bond, length as m-dash]CC[triple bond, length as m-dash]C)Cl2(CO)4(PPh3)4]. This may be compared with the first example of a butenyndiyl bridged bimetallic complex [Ru2(μ-CH[double bond, length as m-dash]CHC[triple bond, length as m-dash]C)Cl2(CO)4(PPh3)4] which is obtained from the reaction of [Ru(C[triple bond, length as m-dash]CC[triple bond, length as m-dash]CH)Cl(CO)2(PPh3)2] with [RuHCl(CO)(PPh3)3] followed by carbonylation. Characterisational data are discussed with reference to constituent model complexes [Ru(C[triple bond, length as m-dash]CH)Cl(CO)2(PPh3)2] and [Ru(CH[double bond, length as m-dash]CH2)Cl(CO)2(PPh3)2] in addition to DFT analysis of the bonding in the complexes [Ru2(μ-L)Cl2(CO)4(PMe3)4] (L = C[triple bond, length as m-dash]C-C[triple bond, length as m-dash]C, CH[double bond, length as m-dash]CHC[triple bond, length as m-dash]C, CH[double bond, length as m-dash]CH-CH[double bond, length as m-dash]CH). A range of other tetracarbido complexes which may be prepared from [RuCl(C[triple bond, length as m-dash]CC[triple bond, length as m-dash]CH)(CO)2(PPh3)2] is also described and includes [RuAu(μ-C4)Cl(CO)3(PPh3)3], [RuIr(μ-C4)Cl(CO)3(PPh3)4], [RuIr(μ-C4)H(NCMe)(CO)3(PPh3)4]BF4, [RuIr(μ-C4)Cl(η2-O2)(CO)3(PPh3)4], [Ru2Hg(μ-C4)2Cl2(CO)4(PPh3)4], [Ru2Pt(μ-C4)2Cl2(CO)4(PPh3)6] and [Ru2(μ-C4)HCl(CO)4(PPh3)4].
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Affiliation(s)
- Michael J Bartlett
- Research School of Chemistry, Australian National University, Canberra, Australian Capital Territory ACT 2601, Australia.
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Alegria EC, Guedes da Silva MFC, Kuznetsov ML, Martins LM, Pombeiro AJ. Mono-alkylation of cyanoimide at a molybdenum(IV) diphosphinic center by alkyl halides: synthesis, cathodically induced isomerization and theoretical studies. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.09.120] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Francàs L, González-Gil RM, Poater A, Fontrodona X, García-Antón J, Sala X, Escriche L, Llobet A. Synthesis, Characterization, and Linkage Isomerism in Mononuclear Ruthenium Complexes Containing the New Pyrazolate-Based Ligand Hpbl. Inorg Chem 2014; 53:8025-35. [DOI: 10.1021/ic5009076] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Laia Francàs
- Institute of Chemical Research of Catalonia (ICIQ), Avingunda Països Catalans 16, E-43007 Tarragona, Spain
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Rosa M. González-Gil
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Albert Poater
- Serveis Tècnics de Recerca, Institut de Química
Computacional i Catàlisi and Departament de Química, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Spain
| | - Xavier Fontrodona
- Serveis Tècnics de Recerca, Institut de Química
Computacional i Catàlisi and Departament de Química, Universitat de Girona, Campus de Montilivi, E-17071 Girona, Spain
| | - Jordi García-Antón
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Xavier Sala
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Lluís Escriche
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Antoni Llobet
- Institute of Chemical Research of Catalonia (ICIQ), Avingunda Països Catalans 16, E-43007 Tarragona, Spain
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
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Kato M, Unoura K, Takayanagi T, Ikeda Y, Fujihara T, Nagasawa A. Preferential behavior on donating atoms of an ambidentate ligand 2-methylisothiazol-3(2H)-one in its metal complexes. Inorg Chem 2013; 52:13375-83. [PMID: 24205862 DOI: 10.1021/ic401673z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Five metal complexes of 2-methylisothiazol-3(2H)-one (MIO), [Co(III)(NH3)5(MIO)](3+), [Ru(II)(NH3)5(MIO)](2+), [Ru(III)(NH3)5(MIO)](3+), [Pt(II)Cl3(MIO)](-), and trans-[U(VI)O2(NO3)2(MIO)2], were synthesized, and their structures were determined by single-crystal X-ray crystallography. MIO is an ambidentate ligand and coordinates to metal centers through its oxygen atom in the cobalt(III), ruthenium(III), and uranium(VI) complexes and through its sulfur atom in the ruthenium(II) and platinum(III) complexes. This result suggests that MIO shows preferential behavior on its donating atoms. We also studied the electron-donor abilities of the oxygen and sulfur atoms of MIO. Various physical measurements on the conjugate acid of MIO and the MIO complexes allowed us to determine an acid dissociation constant (pKa) and donor number (DN) for the oxygen atom of MIO and Lever's electrochemical parameter (EL) and a relative covalency parameter (kL) for the sulfur atom.
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Affiliation(s)
- Masaru Kato
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University , 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570, Japan
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Lomoth R. Redox-stimulated motion and bistability in metal complexes and organometallic compounds. Antioxid Redox Signal 2013; 19:1803-14. [PMID: 23145475 DOI: 10.1089/ars.2012.5054] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
SIGNIFICANCE Control over reversible changes to molecular structure forms the basis for artificial molecular machines that could eventually lead to the development of molecule-based nanotechnology. RECENT ADVANCES Particular applications in information storage and processing could emerge where the structural rearrangements give rise to bistability and molecular hysteresis effects. CRITICAL ISSUES Oxidation-state-dependent coordination and bonding preferences in transition metal complexes and organometallic compounds provide a versatile approach to the control of molecular motions by redox input, but so far, few structural motifs have been applied in redox-actuated molecular machines. FUTURE DIRECTIONS Further progress toward molecule-based nanoscale devices might be accomplished with molecular components derived from a wider range of structural themes and forms of molecular motion. Examples of redox-stimulated rearrangements in metal complexes and organometallic compounds are described that have been employed in molecular machines or could be considered for the design of new functional molecules.
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Affiliation(s)
- Reiner Lomoth
- Ångström Laboratory, Department of Chemistry, Uppsala University , Uppsala, Sweden
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Effect of ligand basicity on electrochemically induced linkage isomerization in 2-mercaptopyridine–ruthenium complexes. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.11.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Schlosser F, Moos M, Lambert C, Würthner F. Redox-switchable intramolecular π-π-stacking of perylene bisimide dyes in a cyclophane. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:410-4. [PMID: 22807177 DOI: 10.1002/adma.201201266] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Indexed: 05/21/2023]
Abstract
Molecular actuation by stepwise electrochemical reduction is demonstrated for a cyclophane that exhibits a pronounced conformational transition from a closed cavity with cofacially stacked PBIs in the neutral state to an expanded open cavity in the three- and fourfold reduced state.
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Affiliation(s)
- Felix Schlosser
- Universität Würzburg, Institut für Organische Chemie & Center for Nanosystems Chemistry, Am Hubland, 97074 Würzburg, Germany
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Hamaguchi T, Inoue Y, Ujimoto K, Kawata S, Ando I. Control of Isomerization of Pyridinethiol–Ruthenium Complexes via External Stimuli and Factors Affecting Isomerization Behavior. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2012. [DOI: 10.1246/bcsj.20110183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Yoshimasa Inoue
- Department of Chemistry, Faculty of Science, Fukuoka University
| | | | - Satoshi Kawata
- Department of Chemistry, Faculty of Science, Fukuoka University
| | - Isao Ando
- Department of Chemistry, Faculty of Science, Fukuoka University
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Porter BL, McClure BA, Abrams ER, Engle JT, Ziegler CJ, Rack JJ. Photoisomerization in an analogous set of ruthenium sulfoxide complexes. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2010.11.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Lian GJ, Chen B, Zhang TT, Zhuang LZ, Liang HZ. 6-Methyl-pyridine-2(1H)-thione. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o1154-o1155. [PMID: 21579200 PMCID: PMC2979122 DOI: 10.1107/s1600536810014273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2010] [Accepted: 04/19/2010] [Indexed: 05/30/2023]
Abstract
There are two unique mol-ecules in the asymmetric unit of the title pyridine-thione derivative, C(6)H(7)NS, each of which adopts the thione rather than the mercaptan form. The rings in both mol-ecules are essentially planar, with maximum deviations from the least-squares planes through all non-H atoms of 0.021 (2) and 0.017 (2) Å. In the crystal structure, the mol-ecules form centrosymmetric cyclic dimers through inter-molecular N-H⋯S hydrogen bonds. Additional C-H(meth-yl)⋯S inter-actions generate a three-dimensional network.
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Affiliation(s)
- Guo-Jun Lian
- School of Public Health of Wenzhou Medical College, Wenzhou 325035, People’s Republic of China
| | - Bo Chen
- State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, People’s Republic of China
| | - Ting-Ting Zhang
- State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, People’s Republic of China
| | - Li-Zhen Zhuang
- State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, People’s Republic of China
| | - Hong-Ze Liang
- State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, People’s Republic of China
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Synthesis, characterization, and reaction pathways for the formation of a GMP adduct of a cytotoxic thiocyanato ruthenium arene complex. J Biol Inorg Chem 2009; 14:1065-76. [PMID: 19499253 DOI: 10.1007/s00775-009-0549-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2009] [Accepted: 05/11/2009] [Indexed: 10/20/2022]
Abstract
The organoruthenium complex [(eta(6)-hmb)Ru(en)(Cl)][PF6] (hmb is hexamethylbenzene, en is ethylenediamine) undergoes facile aquation and then reacts with KSCN in unbuffered solution to give the S-coordinated thiocyanato product [(eta(6)-hmb)Ru(en)(S-SCN)]+ which slowly converts to the thermodynamically favored N-bound complex [(eta(6)-hmb)Ru(en)(N-NCS)]+ (1+). Complex 1 was synthesized and characterized by X-ray crystallography and mass spectrometry. Despite its lack of hydrolysis over 24 h, complex 1 exhibits moderate cytotoxicity (IC(50) 24 microM) towards the human ovarian cancer cell line A2780, comparable with that of the chlorido analogue which is thought to be activated (towards potential target DNA) via a rapid aquation (Wang et. al. in Proc Natl Acad Sci USA 102:18269-18274, 2005). Detailed kinetic studies suggest that complex 1 binds to guanosine 5'-monophosphate (GMP) through direct N7 substitution of the N-bound SCN ligand. In the presence of a high concentration of chloride (104 mM), however, complex 1 may bind partly to GMP via Cl substitution.
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Kato M, Takayanagi T, Fujihara T, Nagasawa A. Linkage isomerism of pentaammine(dimethylsulfoxide)ruthenium(II/III) complexes: A theoretical study. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.06.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Johansson O, Johannissen L, Lomoth R. Bistable Molecular Switches Based on Linkage Isomerization in Ruthenium Polypyridyl Complexes with a Ligand-Bound Ambidentate Motif. Chemistry 2008; 15:1195-204. [DOI: 10.1002/chem.200801208] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Vandenburgh L, Buck MR, Freedman DA. Preparation, separation, and characterization of ruthenium(II) thiocyanate linkage isomers. Inorg Chem 2008; 47:9134-6. [PMID: 18811154 DOI: 10.1021/ic801194j] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The reaction of [(p-cym)Ru(bpy)Cl](+) (p-cym = eta(6)-p-cymene; bpy = 2,2'-bipyridine) with SCN(-) gives a mixture of the linkage isomers [(p-cym)Ru(bpy)(SCN)](+) and [(p-cym)Ru(bpy)(NCS)](+). The linkage isomers were efficiently separated by column chromatography on Hg(NO3)2-coated Al2O3. Both isomers were fully characterized by elemental analysis, (1)H NMR and IR spectroscopy, and X-ray crystallography. The equilibrium constant for the conversion of the S-bound to the N-bound isomer was determined to be 0.29(4) in methanol-d4 and 0.74(7) in acetone-d6, respectively, at 50 degrees C. Kinetic data for the linkage isomerization reaction are also reported.
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Affiliation(s)
- Lucas Vandenburgh
- Chemistry Department, The State University of New York at New Paltz, 1 Hawk Drive, New Paltz, New York 12561, USA
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Tsekouras G, Minder N, Figgemeier E, Johansson O, Lomoth R. A bistable electrochromic material based on a hysteretic molecular switch immobilised on nanoparticulate metal oxide. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b810768h] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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