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Das R, Linseis M, Schupp SM, Schmidt-Mende L, Winter RF. Electron-Rich Diruthenium Complexes with π-Extended Alkenyl Ligands and Their F 4 TCNQ Charge-Transfer Salts. Chemistry 2022; 28:e202104403. [PMID: 35235235 PMCID: PMC9310581 DOI: 10.1002/chem.202104403] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Indexed: 11/07/2022]
Abstract
The synthesis of dinuclear ruthenium alkenyl complexes with {Ru(CO)(Pi Pr3 )2 (L)} entities (L=Cl- in complexes Ru2 -3 and Ru2 -7; L=acetylacetonate (acac- ) in complexes Ru2 -4 and Ru2 -8) and with π-conjugated 2,7-divinylphenanthrenediyl (Ru2 -3, Ru2 -4) or 5,8-divinylquinoxalinediyl (Ru2 -7, Ru2 -8) as bridging ligands are reported. The bridging ligands are laterally π-extended by anellating a pyrene (Ru2 -7, Ru2 -8) or a 6,7-benzoquinoxaline (Ru2 -3, Ru2 -4) π-perimeter. This was done with the hope that the open π-faces of the electron-rich complexes will foster association with planar electron acceptors via π-stacking. The dinuclear complexes were subjected to cyclic and square-wave voltammetry and were characterized in all accessible redox states by IR, UV/Vis/NIR and, where applicable, by EPR spectroscopy. These studies signified the one-electron oxidized forms of divinylphenylene-bridged complexes Ru2 -7, Ru2 -8 as intrinsically delocalized mixed-valent species, and those of complexes Ru2 -3 and Ru2 -4 with the longer divinylphenanthrenediyl linker as partially localized on the IR, yet delocalized on the EPR timescale. The more electron-rich acac- congeners formed non-conductive 1 : 1 charge-transfer (CT) salts on treatment with the F4 TCNQ electron acceptor. All spectroscopic techniques confirmed the presence of pairs of complex radical cations and F4 TCNQ.- radical anions in these CT salts, but produced no firm evidence for the relevance of π-stacking to their formation and properties.
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Affiliation(s)
- Rajorshi Das
- Fachbereich Chemie, Universität Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Michael Linseis
- Fachbereich Chemie, Universität Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Stefan M Schupp
- Fachbereich Physik, Universität Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Lukas Schmidt-Mende
- Fachbereich Physik, Universität Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Rainer F Winter
- Fachbereich Chemie, Universität Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
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Henke WC, Kerr TA, Sheridan TR, Henling LM, Takase MK, Day VW, Gray HB, Blakemore JD. Synthesis, structural studies, and redox chemistry of bimetallic [Mn(CO) 3] and [Re(CO) 3] complexes. Dalton Trans 2021; 50:2746-2756. [PMID: 33459317 PMCID: PMC7983307 DOI: 10.1039/d0dt03666h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Manganese ([Mn(CO)3]) and rhenium tricarbonyl ([Re(CO)3]) complexes represent a workhorse family of compounds with applications in a variety of fields. Here, the coordination, structural, and electrochemical properties of a family of mono- and bimetallic [Mn(CO)3] and [Re(CO)3] complexes are explored. In particular, a novel heterobimetallic complex featuring both [Mn(CO)3] and [Re(CO)3] units supported by 2,2'-bipyrimidine (bpm) has been synthesized, structurally characterized, and compared to the analogous monomeric and homobimetallic complexes. To enable a comprehensive structural analysis for the series of complexes, we have carried out new single crystal X-ray diffraction studies of seven compounds: Re(CO)3Cl(bpm), anti-[{Re(CO3)Cl}2(bpm)], Mn(CO)3Br(bpz) (bpz = 2,2'-bipyrazine), Mn(CO)3Br(bpm), syn- and anti-[{Mn(CO3)Br}2(bpm)], and syn-[Mn(CO3)Br(bpm)Re(CO)3Br]. Electrochemical studies reveal that the bimetallic complexes are reduced at much more positive potentials (ΔE≥ 380 mV) compared to their monometallic analogues. This redox behavior is consistent with introduction of the second tricarbonyl unit which inductively withdraws electron density from the bridging, redox-active bpm ligand, resulting in more positive reduction potentials. [Re(CO3)Cl]2(bpm) was reduced with cobaltocene; the electron paramagnetic resonance spectrum of the product exhibits an isotropic signal (near g = 2) characteristic of a ligand-centered bpm radical. Our findings highlight the facile synthesis as well as the structural characteristics and unique electrochemical behavior of this family of complexes.
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Affiliation(s)
- Wade C Henke
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, USA.
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Kisel KS, Melnikov AS, Grachova EV, Karttunen AJ, Doménech-Carbó A, Monakhov KY, Semenov VG, Tunik SP, Koshevoy IO. Supramolecular Construction of Cyanide-Bridged Re I Diimine Multichromophores. Inorg Chem 2019; 58:1988-2000. [PMID: 30633505 DOI: 10.1021/acs.inorgchem.8b02974] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reactions of labile [Re(diimine)(CO)3(H2O)]+ precursors (diimine = 2,2'-bipyridine, bpy; 1,10-phenanthroline, phen) with dicyanoargentate anion produce the dirhenium cyanide-bridged compounds [{Re(diimine)(CO)3}2CN)]+ (1 and 2). Substitution of the axial carbonyl ligands in 2 for triphenylphosphine gives the derivative [{Re(phen)(CO)2(PPh3)}2CN]+ (3), while the employment of a neutral metalloligand [Au(PPh3)(CN)] affords heterobimetallic complex [{Re(phen)(CO)3}NCAu(PPh3)]+ (4). Furthermore, the utilization of [Au(CN)2]-, [Pt(CN)4]2-, and [Fe(CN)6]4-/3- cyanometallates leads to the higher nuclearity aggregates [{Re(diimine)(CO)3NC} xM] m+ (M = Au, x = 2, 5 and 6; Pt, x = 4, 7 and 8; Fe, x = 6, 9 and 10). All novel compounds were characterized crystallographically. Assemblies 1-8 are phosphorescent both in solution and in the solid state; according to the DFT analysis, the optical properties are mainly associated with charge transfer from Re tricarbonyl motif to the diimine fragment. The energy of this process can be substantially modified by the properties of the ancillary ligands that allows to attain near-IR emission for 3 (λem = 737 nm in CH2Cl2). The Re-FeII/III complexes 9 and 10 are not luminescent but exhibit low energy absorptions, reaching 846 nm (10) due to ReI → FeIII transition.
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Affiliation(s)
- Kristina S Kisel
- Institute of Chemistry , St. Petersburg State University , Universitetskiy pr. 26, Petergof , St. Petersburg 198504 , Russia.,Department of Chemistry , University of Eastern Finland , 80101 Joensuu , Finland
| | - Alexei S Melnikov
- Peter the Great St. Petersburg Polytechnic University , Polytechnicheskaya, 29 , St. Petersburg 195251 , Russia
| | - Elena V Grachova
- Institute of Chemistry , St. Petersburg State University , Universitetskiy pr. 26, Petergof , St. Petersburg 198504 , Russia
| | - Antti J Karttunen
- Department of Chemistry and Materials Science , Aalto University , 00076 Aalto , Finland
| | | | - Kirill Yu Monakhov
- Leibniz Institute of Surface Engineering (IOM) , Permoserstraße 15 , 04318 Leipzig , Germany
| | - Valentin G Semenov
- Institute of Chemistry , St. Petersburg State University , Universitetskiy pr. 26, Petergof , St. Petersburg 198504 , Russia
| | - Sergey P Tunik
- Institute of Chemistry , St. Petersburg State University , Universitetskiy pr. 26, Petergof , St. Petersburg 198504 , Russia
| | - Igor O Koshevoy
- Department of Chemistry , University of Eastern Finland , 80101 Joensuu , Finland
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Kuo HY, Lee TS, Chu AT, Tignor SE, Scholes GD, Bocarsly AB. A cyanide-bridged di-manganese carbonyl complex that photochemically reduces CO2 to CO. Dalton Trans 2019; 48:1226-1236. [DOI: 10.1039/c8dt03358g] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A cyanide-bridged di-manganese complex, {[Mn(bpy)(CO)3]2(μ-CN)}+, is introduced as an efficient electrocatalyst and photochemically active for proton-assisted of CO2 reduction to CO.
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Affiliation(s)
- Hsin-Ya Kuo
- Princeton University
- Department of Chemistry
- Princeton
- USA
| | - Tia S. Lee
- Princeton University
- Department of Chemistry
- Princeton
- USA
| | - An T. Chu
- Princeton University
- Department of Chemistry
- Princeton
- USA
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Kachi-Terajima C, Kimura N, Tomori Y, Akahoshi D, Saito T. Solvent-dependent structures of lanthanide–TCNQ coordination networks and their magnetic properties. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1521965] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Chihiro Kachi-Terajima
- Department of Chemistry, Faculty of Science, Toho University, Miyama, Funabashi, Chiba, Japan
- Research Centre for Materials with Integrated Properties, Toho University, Miyama, Funabashi, Chiba, Japan
| | - Norihisa Kimura
- Department of Chemistry, Faculty of Science, Toho University, Miyama, Funabashi, Chiba, Japan
| | - Yuka Tomori
- Department of Chemistry, Faculty of Science, Toho University, Miyama, Funabashi, Chiba, Japan
| | - Daisuke Akahoshi
- Research Centre for Materials with Integrated Properties, Toho University, Miyama, Funabashi, Chiba, Japan
- Department of Physics, Faculty of Science, Toho University, Miyama, Funabashi, Chiba, Japan
| | - Toshiaki Saito
- Research Centre for Materials with Integrated Properties, Toho University, Miyama, Funabashi, Chiba, Japan
- Department of Physics, Faculty of Science, Toho University, Miyama, Funabashi, Chiba, Japan
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Plebst S, Bubrin M, Schweinfurth D, Záliš S, Kaim W. Metal carbonyl complexes of potentially ambidentate 2,1,3-benzothiadiazole and 2,1,3-benzoselenadiazole acceptors. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2017. [DOI: 10.1515/znb-2017-0100] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The compounds [W(CO)5(btd)], [W(CO)5(bsd] and [Re(CO)3(bpy)(bsd)](BF4), btd=2,1,3-benzothiadiazole and bsd=2,1,3-benzoselenadiazole were isolated and characterized experimentally (crystal structure, spectroscopy, spectroelectrochemistry) and by density functional theory calculations. The results confirm single N-coordination in all cases, binding to Se was calculated to be less favorable. Studies of one-electron reduced forms indicate that the N-coordination is maintained during electron transfer.
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Affiliation(s)
- Sebastian Plebst
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55 , D-70550 Stuttgart , Germany
| | - Martina Bubrin
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55 , D-70550 Stuttgart , Germany
| | - David Schweinfurth
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55 , D-70550 Stuttgart , Germany
| | - Stanislav Záliš
- J. Heyrovský Institute of Physical Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Dolejškova 3 , CZ-18223 Prague , Czech Republic
| | - Wolfgang Kaim
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55 , D-70550 Stuttgart , Germany
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Jana R, Mobin SM, Schwederski B, Fiedler J, Kaim W. Variable coordination of redox-active TCNB in discrete and polymeric ferrocenylcopper(I) complexes: structures and spectroelectrochemical behaviour. Dalton Trans 2013; 42:16142-50. [PMID: 24022668 DOI: 10.1039/c3dt51360b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,2,4,5-Tetracyanobenzene (TCNB) was reacted with [Cu(dppf)(CH3CN)2](BF4) and [Cu(dchpf)(CH3CN)](BF4), dppf = 1,1'-bis(diphenylphosphino)ferrocene and dchpf = 1,1'-bis(dicyclohexylphosphino)ferrocene, to produce a heterotetranuclear metallamacrocycle 1, {[Cu(dppf)(μ-TCNB)](BF4)}2, and a heterooctanuclear complex 2, [{Cu(dchpf)}4(μ4-TCNB)](BF4)4. Complex 1 is the first example of a structurally characterised discrete transition metal complex of TCNB. Upon crystallisation attempts, compound 2 formed the structurally identified coordination polymer 3, {[Cu(dchpf)(μ-TCNB)]2(BF4)2}n. Structural and spectroscopic analyses confirmed the redox-innocent behaviour of TCNB in 1, 2 and 3. However, the soluble compounds 1 and 2 could be oxidised and reduced spectroelectrochemically (UV-vis, IR, and EPR). The oxidation occurs invariably at the ferrocene sites without notable splitting of redox potentials. Reduction involves the TCNB bridging ligands to produce radical complexes. As a variably bridging acceptor component of supramolecular structures the TCNB ligand thus adopts an intermediate position between the highly electron transfer-active TCNE, TCNQ and TCNQF4 systems and the numerous redox-innocent bridges.
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Affiliation(s)
- Rajkumar Jana
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring55, D-70550 Stuttgart, Germany.
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8
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Vasconcelos P, Silva F, Gomes E, Carvalho I, Lopes L, Diógenes I, Costa M, Fechine P, Longhinotti E. Synthesis, characterization and dielectric properties of [Ru(SO3)(bpy)2(TCNX)] complexes. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Lo LTL, Lai SW, Yiu SM, Ko CC. A new class of highly solvatochromic dicyano rhenate(I) diimine complexes--synthesis, photophysics and photocatalysis. Chem Commun (Camb) 2013; 49:2311-3. [PMID: 23396368 DOI: 10.1039/c3cc39189b] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A new class of dicarbonyl dicyano rhenate(I) diimine complexes, cis,trans-[Re(CO)(2)(CN)(2)(N-N)](-), with highly environmentally sensitive MLCT absorption and emission properties was synthesised and characterised. Preliminary experiments revealed that these complexes are active photocatalysts for CO(2) reduction.
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Affiliation(s)
- Larry Tso-Lun Lo
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
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Abstract
We report the synthesis and characterization of covalent organic frameworks (COFs) incorporating thiophene-based building blocks. We show that these are amenable to reticular synthesis, and that bent ditopic monomers, such as 2,5-thiophenediboronic acid, are defect-prone building blocks that are susceptible to synthetic variations during COF synthesis. The synthesis and characterization of an unusual charge transfer complex between thieno[3,2-b]thiophene-2,5-diboronic acid and tetracyanoquinodimethane enabled by the unique COF architecture is also presented. Together, these results delineate important synthetic advances toward the implementation of COFs in electronic devices.
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Jana R, Schwederski B, Fiedler J, Kaim W. Reprint of “Facilitated reduction and oxidation of {[Ru(NH3)5]4(μ4-TCNX)}8+ by changing from TCNX=TCNQ to TCNQF4”. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.02.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Jana R, Schwederski B, Fiedler J, Kaim W. Facilitated reduction and oxidation of {[Ru(NH3)5]4(μ4-TCNX)}8+ by changing from TCNX=TCNQ to TCNQF4. Polyhedron 2012. [DOI: 10.1016/j.poly.2012.06.066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Multielectron Redox Chemistry of a Neutral, NIR-Active, Indigo-Pillared ReI-Based Triangular Metalloprism. Chemistry 2012; 18:5275-83. [DOI: 10.1002/chem.201102087] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Revised: 12/09/2011] [Indexed: 11/07/2022]
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Drozdz A, Bubrin M, Fiedler J, Záliš S, Kaim W. (α-Diimine)tricarbonylhalorhenium complexes: the oxidation side. Dalton Trans 2012; 41:1013-9. [DOI: 10.1039/c1dt11449b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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15
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Bruce MI, Fox MA, Low PJ, Nicholson BK, Parker CR, Patalinghug WC, Skelton BW, White AH. Substitution of Tetracyanoethene by Ethynyl–Metal Complexes Gives Tricyanovinylethynyl (Tricyanobutenynyl) Derivatives: Syntheses, Protonation, and Addition of Metal–Ligand Fragments. Organometallics 2011. [DOI: 10.1021/om2007503] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael I. Bruce
- School of Chemistry & Physics, University of Adelaide, Adelaide, South Australia 5005
| | - Mark A. Fox
- Department of Chemistry, University of Durham, South Road, Durham DH1 3LE, England
| | - Paul J. Low
- Department of Chemistry, University of Durham, South Road, Durham DH1 3LE, England
| | | | - Christian R. Parker
- School of Chemistry & Physics, University of Adelaide, Adelaide, South Australia 5005
| | - Wyona C. Patalinghug
- University of Western Australia, Crawley, Western Australia 6009
- Department of Chemistry, Delasalle University, Manila, The Philippines 1004
| | - Brian W. Skelton
- University of Western Australia, Crawley, Western Australia 6009
- Centre for Microscopy, Characterisation
and Analysis, University of Western Australia, Crawley,
Western Australia 6009
| | - Allan H. White
- University of Western Australia, Crawley, Western Australia 6009
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Abstract
The potential of redox-active ligands to behave "noninnocently" in transition-metal coordination compounds is reflected with respect to various aspects and situations. These include the question of establishing "correct" oxidation states, the identification and characterization of differently charged radical ligands, the listing of structural and other consequences of ligand redox reactions, and the distinction between barrierless delocalized "resonance" cases M(n)/L(n) ↔ M(n+1)L(n-1) versus separated valence tautomer equilibrium situations M(n)/L(n) ⇌ M(n+1)L(n-1). Further ambivalence arises for dinuclear systems with radical bridge M(n)(μ-L(•))M(n) versus mixed-valent alternatives M(n+1)(μ-L(-))M(n), for noninnocent ligand-bridged coordination compounds of higher nuclearity such as (μ(3)-L)M(3), (μ(4)-L)M(4), (μ-L)(4)M(4), or coordination polymers. Conversely, the presence of more than one noninnocently behaving ligand at a single transition-metal site in situations such as L(n)-M-L(n-1) or L(•)-M-L(•) may give rise to corresponding ligand-to-ligand interaction phenomena (charge transfer, electron hopping, and spin-spin coupling) and to redox-induced electron transfer with counterintuitive oxidation-state changes. The relationships of noninnocent ligand behavior with excited-state descriptions and perspectives regarding material properties and single-electron or multielectron reactivity are also illustrated briefly.
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Affiliation(s)
- Wolfgang Kaim
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany.
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Qu M, Lv Q, Yang B, Zhang W, Zhang J, Zhan S, Ye J. Mediated Electron Transfer Across Supported Bilayer Lipid Membrane with TCNQ-Based Organometallic Compounds. ELECTROANAL 2010. [DOI: 10.1002/elan.200900349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Synthesis and structures of copper(I) and cobalt(III) dimers with the dicyano-acetic acid methyl ester anion derived from TCNE. TRANSIT METAL CHEM 2009. [DOI: 10.1007/s11243-009-9236-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Structure, electrochemistry, spectroscopy, and magnetic resonance, including high-field EPR, of {(μ-abpy)[Re(CO)3X]2}o/•−, where abpy=2,2′-azobispyridine and X=F, Cl, Br, I. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2008.09.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Evidence for the dimer-of-(mixed-valent dimers) configuration in tetranuclear {(μ4-TCNX)[Ru(NH3)5]4}8+, TCNX = TCNE and TCNQ, from DFT calculations. MONATSHEFTE FUR CHEMIE 2009. [DOI: 10.1007/s00706-009-0129-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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22
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Silva MDSDP, Diógenes IC, Lopes LGDF, Moreira ÍDS, de Carvalho IM. Synthesis and physical properties of ruthenium bipyridine complexes with TCNQ and TCNE ligands. Polyhedron 2009. [DOI: 10.1016/j.poly.2008.12.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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23
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Bruce MI, Burgun A, Kramarczuk KA, Nicholson BK, Parker CR, Skelton BW, White AH, Zaitseva NN. Tricyanovinylalkynyl–metal complexes: synthesis and some reactions. Dalton Trans 2009:33-6. [DOI: 10.1039/b810720c] [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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Bruce MI, Cole ML, Parker CR, Skelton BW, White AH. Synthesis and Some Reactions of the Heterometallic C7 Complex {Cp*(dppe)Ru}C≡CC≡CC≡CC{Co3(μ-dppm)(CO)7}. Organometallics 2008. [DOI: 10.1021/om7010968] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael I. Bruce
- School of Chemistry and Physics, University of Adelaide, Adelaide, South Australia 5005, and Chemistry M313, SBBCS, University of Western Australia, Crawley, Western Australia 6009
| | - Marcus L. Cole
- School of Chemistry and Physics, University of Adelaide, Adelaide, South Australia 5005, and Chemistry M313, SBBCS, University of Western Australia, Crawley, Western Australia 6009
| | - Christian R. Parker
- School of Chemistry and Physics, University of Adelaide, Adelaide, South Australia 5005, and Chemistry M313, SBBCS, University of Western Australia, Crawley, Western Australia 6009
| | - Brian W. Skelton
- School of Chemistry and Physics, University of Adelaide, Adelaide, South Australia 5005, and Chemistry M313, SBBCS, University of Western Australia, Crawley, Western Australia 6009
| | - Allan H. White
- School of Chemistry and Physics, University of Adelaide, Adelaide, South Australia 5005, and Chemistry M313, SBBCS, University of Western Australia, Crawley, Western Australia 6009
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Song YQ, Lv QY, Zhan SZ, Wang JG, Su JY, Ding A. {[Cu2(μ-Cl)(μ-dppm)2](μ2-TCNQ)}∞, a charge transfer compound derived from a donor with a copper dimer. INORG CHEM COMMUN 2008. [DOI: 10.1016/j.inoche.2008.03.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Mtshali TN, Purcell W, Visser HG, Basson SS. A novel rhenium-aqua structure: the synthesis and structural characterization of (PPh4)4[ReN(H2O)(CN)3-μ-CN-ReN(CN)4] · 5H2O. TRANSIT METAL CHEM 2008. [DOI: 10.1007/s11243-008-9100-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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27
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Maity AN, Sarkar B, Niemeyer M, Sieger M, Duboc C, Zalis S, Kaim W. A tetranuclear organorhenium(i) complex of the 2,3,5,6-tetrafluoro-7,7,8,8-tetracyano-p-quinodimethane radical anion, TCNQF4˙−. Dalton Trans 2008:5749-53. [DOI: 10.1039/b807977c] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Maity AN, Schwederski B, Sarkar B, Zális S, Fiedler J, Kar S, Lahiri GK, Duboc C, Grunert M, Gütlich P, Kaim W. Tetranuclear Complexes of [Fe(CO)2(C5H5)]+ with TCNX Ligands (TCNX = TCNE, TCNQ, TCNB): Intramolecular Electron Transfer Alternatives in Compounds (μ4-TCNX)[MLn]4. Inorg Chem 2007; 46:7312-20. [PMID: 17691765 DOI: 10.1021/ic062253k] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The complexes {(mu4-TCNX)[Fe(CO)2(C5H5)]4}(BF4)4 were prepared as light-sensitive materials from [Fe(CO)2(C5H5) (THF)](BF4) and the corresponding TCNX ligands (TCNE = tetracyanoethene, TCNQ=7,7,8,8-tetracyano-p-quinodimethane, TCNB=1,2,4,5-tetracyanobenzene). Whereas the TCNE and TCNQ complexes are extremely easily reduced species with reduction potentials>+0.3 V vs ferrocenium/ferrocene, the tetranuclear complex of TCNB exhibits a significantly more negative reduction potential at about -1.0 V. Even for the complexes with strongly pi-accepting TCNE and TCNQ, the very positive reduction potentials, the unusually high nitrile stretching frequencies>2235 cm(-1), and the high-energy charge-transfer transitions indicate negligible metal-to-ligand electron transfer in the ground state, corresponding to a largely unperturbed (TCNX degrees)(FeII)4 formulation of oxidation states as caused by orthogonality between the metal-centered HOMO and the pi* LUMO of TCNX. Mössbauer spectroscopy confirms the low-spin iron(II) state, and DFT calculations suggest coplanar TCNE and TCNQ bridging ligands in the complex tetracations. One-electron reduction to the 3+ forms of the TCNE and TCNQ complexes produces EPR spectra which confirm the predominant ligand character of the then singly occupied MO through isotropic g values slightly below 2, in addition to a negligible g anisotropy of frozen solutions at frequencies up to 285 GHz and also through an unusually well-resolved solution X band EPR spectrum of {(mu4-TCNE)[Fe(CO)2(C5H5)]4}3+ which shows the presence of four equivalent [Fe(CO)2(C5H5)]+ moieties through 57Fe and 13C(CO) hyperfine coupling in nonenriched material. DFT calculations reproduce the experimental EPR data. A survey of discrete TCNE and TCNQ complexes [(mu4-TCNX)(MLn)4] exhibits a dichotomy between the systems {(mu4-TCNX)[Fe(CO)2(C5H5)]4}4+ and {(mu4-TCNQ)[Re(CO)3(bpy)]4}4+ with their negligible metal-to-ligand electron transfer and several other compounds of TCNE or TCNQ with Mn, Ru, Os, or Cu complex fragments which display evidence for a strong such interaction, i.e., an appreciable value delta in the formulation {(mu4-TCNXdelta-)[Mx+delta/4Ln]4}. Irreversibility of the first reduction of {(mu4-TCNB)[Fe(CO)2(C5H5)]4}(BF4)4 precluded spectroelectrochemical studies; however, the high-energy CN stretching frequencies and charge transfer absorptions of that TCNB analogue also confirm the exceptional position of the complexes {(mu4-TCNX)[Fe(CO)2(C5H5)]4}(BF4)4.
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Affiliation(s)
- Amarendra N Maity
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
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Chemistry and application of porous coordination polymers. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/s0167-2991(07)81089-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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Shimomura S, Matsuda R, Tsujino T, Kawamura T, Kitagawa S. TCNQ Dianion-Based Coordination Polymer Whose Open Framework Shows Charge-Transfer Type Guest Inclusion. J Am Chem Soc 2006; 128:16416-7. [PMID: 17177347 DOI: 10.1021/ja0660047] [Citation(s) in RCA: 129] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A three-dimensional coordination framework constructed with 7,7,8,8-tetracyano-p-quinodimethane (TCNQ) diainon has been synthesized and structurally characterized. This open framework possessing a highly electron-rich surface has an optical sensing cavity for several aromatics with crystal-to-crystal transformation and strong accommodation, which are based on a charge-transfer interaction with them.
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Affiliation(s)
- Satoru Shimomura
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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Kurz P, Probst B, Spingler B, Alberto R. Ligand Variations in [ReX(diimine)(CO)3] Complexes: Effects on Photocatalytic CO2 Reduction. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200600166] [Citation(s) in RCA: 213] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Miller JS. Tetracyanoethylene (TCNE): The Characteristic Geometries and Vibrational Absorptions of Its Numerous Structures. Angew Chem Int Ed Engl 2006; 45:2508-25. [PMID: 16596567 DOI: 10.1002/anie.200503277] [Citation(s) in RCA: 140] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Tetracyanoethylene (TCNE) undergoes numerous reactions and is reported to exist in many structural motifs. Identification of these forms and motifs can be challenging. Nonetheless, the number of nu(CN) absorptions and their frequencies provide insight with respect to the specific forms and charge on the TCNE fragment. Particularly informative is the average of the fundamental nu(CN) bands, as well as the length of the central C-C bond. This Review discusses the assignment of structure and formal charge for TCNE-containing compounds. Scrutiny of previous assignments reveals some discrepancies which are discussed, and provides a basis for further study of TCNE structure-function relationships. Several multimetal complexes with bridging [TCNE](z) units exhibit mixed valency and extensive delocalization. The scarcity of suitable model compounds, especially those with M(d(pi-pi*)) backbonding to the CN groups, have thwarted the detailed description of these valence ambiguous compounds; thus, new well-characterized polynuclear compounds are needed.
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Affiliation(s)
- Joel S Miller
- Department of Chemistry, University of Utah, Salt Lake City, UT 84112-0850, USA.
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Miller JS. Tetracyanethylen: die charakteristischen Geometrien und Schwingungsabsorptionen seiner zahlreichen Strukturen. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200503277] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Lefebvre E, Conan F, Cosquer N, Kerbaol JM, Marchivie M, Sala-Pala J, Kubicki MM, Vigier E, Gomez Garcia CJ. Syntheses, structural characterisation and magnetic properties of Fe(ii) and Mn(ii) compounds with the pentacyanopropenido ligand; structural characterisation of a substituted pyrazolo[1,5-a]pyrimidine. NEW J CHEM 2006. [DOI: 10.1039/b605030a] [Citation(s) in RCA: 14] [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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Maity AN, Schwederski B, Kaim W. The redox pair {(μ4-TCNE)[Fe(CO)2(C5H5)]4}4+/3+: Surprisingly small metal–ligand interaction and the first resolved EPR hyperfine structure (13C,14N,57Fe) of a tetranuclear complex with TCNE−. INORG CHEM COMMUN 2005. [DOI: 10.1016/j.inoche.2005.03.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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