1
|
Yang Y, Zhu X, Launay J, Hong C, Su S, Wen Y, Wu X, Sheng T. The Electron Transfer Process in Mixed Valence Compounds with a Low‐lying Energy Bridge in Different Oxidation States. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014501] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Yu‐Ying Yang
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Science Fuzhou 350002 Fujian China
- School of Chemical Sciences University of Chinese Academy of Sciences 100049 Beijing China
| | - Xiao‐Quan Zhu
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Science Fuzhou 350002 Fujian China
- Department of Criminal Investigation Fujian Police College Fuzhou 350007 Fujian China
| | - Jean‐Pierre Launay
- Université de Toulouse CEMES-CNRS 29 rue Jeanne Marvig 31055 Toulouse France
| | - Cheng‐Bin Hong
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Science Fuzhou 350002 Fujian China
- School of Chemical Sciences University of Chinese Academy of Sciences 100049 Beijing China
| | - Shao‐Dong Su
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Science Fuzhou 350002 Fujian China
| | - Yue‐Hong Wen
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Science Fuzhou 350002 Fujian China
| | - Xin‐Tao Wu
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Science Fuzhou 350002 Fujian China
| | - Tian‐Lu Sheng
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Science Fuzhou 350002 Fujian China
| |
Collapse
|
2
|
Yang Y, Zhu X, Launay J, Hong C, Su S, Wen Y, Wu X, Sheng T. The Electron Transfer Process in Mixed Valence Compounds with a Low‐lying Energy Bridge in Different Oxidation States. Angew Chem Int Ed Engl 2021; 60:4804-4814. [DOI: 10.1002/anie.202014501] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Indexed: 12/22/2022]
Affiliation(s)
- Yu‐Ying Yang
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Science Fuzhou 350002 Fujian China
- School of Chemical Sciences University of Chinese Academy of Sciences 100049 Beijing China
| | - Xiao‐Quan Zhu
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Science Fuzhou 350002 Fujian China
- Department of Criminal Investigation Fujian Police College Fuzhou 350007 Fujian China
| | - Jean‐Pierre Launay
- Université de Toulouse CEMES-CNRS 29 rue Jeanne Marvig 31055 Toulouse France
| | - Cheng‐Bin Hong
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Science Fuzhou 350002 Fujian China
- School of Chemical Sciences University of Chinese Academy of Sciences 100049 Beijing China
| | - Shao‐Dong Su
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Science Fuzhou 350002 Fujian China
| | - Yue‐Hong Wen
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Science Fuzhou 350002 Fujian China
| | - Xin‐Tao Wu
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Science Fuzhou 350002 Fujian China
| | - Tian‐Lu Sheng
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Science Fuzhou 350002 Fujian China
| |
Collapse
|
3
|
|
4
|
|
5
|
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.
Collapse
Affiliation(s)
- Amarendra N Maity
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Choukroun R, Lorber C, de Caro D, Vendier L. B(C6F5)3 Adducts of TCNE− and TCNQ−Vanadium Complexes as New Building Blocks for Molecule-Based Magnets. Organometallics 2006. [DOI: 10.1021/om060433w] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robert Choukroun
- Laboratoire de Chimie de Coordination, CNRS UPR 8241, lié par convention à l'Université Paul Sabatier, 205 route de Narbonne, 31077 Toulouse Cedex 04, France
| | - Christian Lorber
- Laboratoire de Chimie de Coordination, CNRS UPR 8241, lié par convention à l'Université Paul Sabatier, 205 route de Narbonne, 31077 Toulouse Cedex 04, France
| | - Dominique de Caro
- Laboratoire de Chimie de Coordination, CNRS UPR 8241, lié par convention à l'Université Paul Sabatier, 205 route de Narbonne, 31077 Toulouse Cedex 04, France
| | - Laure Vendier
- Laboratoire de Chimie de Coordination, CNRS UPR 8241, lié par convention à l'Université Paul Sabatier, 205 route de Narbonne, 31077 Toulouse Cedex 04, France
| |
Collapse
|
7
|
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.
Collapse
Affiliation(s)
- Joel S Miller
- Department of Chemistry, University of Utah, Salt Lake City, UT 84112-0850, USA.
| |
Collapse
|
8
|
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]
|
9
|
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]
|
10
|
Hartmann H, Sarkar B, Kaim W, Fiedler J. Electron transfer reactions of (C5R5)2(CO)2Ti (R=H or Me) with TCNE or TCNQ. J Organomet Chem 2003. [DOI: 10.1016/j.jorganchem.2003.07.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
11
|
Hartmann H, Kaim W, Hartenbach I, Schleid T, Wanner M, Fiedler J. A Fully Characterized Complex Ion with Unreduced TCNQ as Fourfold Bridging Ligand: [(μ4-TCNQ){fac-Re(CO)3(bpy)}4]4+. Angew Chem Int Ed Engl 2001; 40:2842-2844. [DOI: 10.1002/1521-3773(20010803)40:15<2842::aid-anie2842>3.0.co;2-r] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2001] [Indexed: 11/12/2022]
|
12
|
Hartmann H, Kaim W, Hartenbach I, Schleid T, Wanner M, Fiedler J. Ein vollständig charakterisiertes Komplexion mit nichtreduziertem TCNQ als vierfach verbrückendem Liganden: [(
μ
4
‐TCNQ){
fac
‐Re(CO)
3
(bpy)}
4
]
4+ . Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20010803)113:15<2927::aid-ange2927>3.0.co;2-#] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Heiko Hartmann
- Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55, 70550 Stuttgart (Deutschland) Fax: +49‐711‐685‐4165
| | - Wolfgang Kaim
- Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55, 70550 Stuttgart (Deutschland) Fax: +49‐711‐685‐4165
| | - Ingo Hartenbach
- Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55, 70550 Stuttgart (Deutschland) Fax: +49‐711‐685‐4165
| | - Thomas Schleid
- Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55, 70550 Stuttgart (Deutschland) Fax: +49‐711‐685‐4165
| | - Matthias Wanner
- Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55, 70550 Stuttgart (Deutschland) Fax: +49‐711‐685‐4165
| | - Jan Fiedler
- J. Heyrovsky Institute of Physical Chemistry Academy of Sciences of the Czech Republic Dolejškova 3, 18223 Prag (Tschechien)
| |
Collapse
|
13
|
Berger S, Hartmann H, Wanner M, Fiedler J, Kaim W. Tetranuclear complexes {(μ4-TCNX)[Cu(Me3TACN)]4}(BF4)4 with TCNX=TCNE, TCNQ or TCNB (1,2,4,5-tetracyanobenzene) and Me3TACN=1,4,7-trimethyl-1,4,7-triazacyclononane. Inorganica Chim Acta 2001. [DOI: 10.1016/s0020-1693(00)00368-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
14
|
Munakata M, Ning GL, Kuroda-Sowa T, Maekawa M, Suenaga Y, Horino T. Construction of Copper(I) Coordination Polymers of 1,2,4,5-Tetracyanobenzene with Zigzag Sheet and Porous Frameworks. Inorg Chem 1998; 37:5651-5656. [PMID: 11670714 DOI: 10.1021/ic980427v] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This paper describes two copper(I) supramolecules with the same anion and cation but quite different topologies and properties. The reaction of [Cu(CH(3)CN)(4)]PF(6) and 1,2,4,5-tetracyanobenzene (TCNB) leads to two novel polymeric coordination compounds, [Cu(2)(TCNB)(3)](PF(6))(2)(Me(2)CO)(4)( )()(1) and [Cu(2)(TCNB)(3)](PF(6))(2) (2), depending on the solvents used. The crystal structures have been determined by single-crystal X-ray diffraction. Crystal data are as follows. 1: C(21)H(15)N(6)O(2)CuPF(6), monoclinic, P2(1)/a, a = 11.553(4) Å, b = 16.135(7) Å, c = 15.046(3) Å, beta = 108.08(2) degrees, Z = 4. 2: C(15)H(3)N(6)CuPF(6), orthorhombic, Cmcm, a = 28.282(3) Å, b = 10.337(3) Å, c = 16.285(4) Å, Z = 16. In both polymers, copper(I) ions have similar pseudotetrahedral environments and the four coordination sites are fully occupied by the four bridging ligands, two &mgr;(2)-TCNB and two &mgr;(4)-TCNB groups. Polymer 1, obtained in acetone, revealed a two-dimensional zigzag sheet network between copper(I) ions, whereas 2, synthesized in methylethyl ketone, displayed a three-dimensional porous framework with different functional groups (or atom) in different cavities. The redox, magnetic, and conductive behaviors of both complexes are discussed. It is demonstrated that the two complexes give different physicochemical properties.
Collapse
Affiliation(s)
- Megumu Munakata
- Department of Chemistry and Research Institute for Science and Technology, Kinki University, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
| | | | | | | | | | | |
Collapse
|
15
|
Glöckle M, Kaim W, Fiedler J. Valence Delocalization despite Weak Metal−Metal Coupling in a Bis(organoosmium(III,II)) Complex with a Pyrazine Bridge. Organometallics 1998. [DOI: 10.1021/om980586m] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Markus Glöckle
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | - Wolfgang Kaim
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | - Jan Fiedler
- J. Heyrovsky Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-18223 Prague, Czech Republic
| |
Collapse
|
16
|
Waldhör E, Kaim W, Lawson M, Jordanov J. Paramagnetism of Tetranuclear Complexes between TCNX Ligands (TCNE, TCNQ, TCNB) and Four Pentaammineruthenium or Dicarbonyl(pentamethylcyclopentadienyl)manganese Fragments. Inorg Chem 1997; 36:3248-3252. [PMID: 11669988 DOI: 10.1021/ic960998s] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The tetranuclear complexes {(&mgr;(4)-TCNX)[Ru(NH(3))(5)](4)}(A)(8) and (&mgr;(4)-TCNX)[Mn(CO)(2)(C(5)Me(5))](4) [A = PF(6) or CF(3)SO(3); TCNX = TCNE (tetracyanoethene), TCNQ (7,7,8,8-tetracyano-p-quinodimethane), or TCNB (1,2,4,5-tetracyanobenzene)] were studied by variable-temperature (2-300 K) SQUID susceptometry. Mono- and dinuclear species [(PhCN)Ru(NH(3))(5)](PF(6))(2) (PhCN = benzonitrile) and {(&mgr;-L)[Ru(NH(3))(5)](2)}(PF(6))(4) (L = 1,4-dicyanobenzene (terephthalodinitrile) or pyrazine) were also investigated for comparison and were found to be essentially diamagnetic. Despite the even electron count, both the ruthenium and manganese tetranuclear complexes are paramagnetic, albeit with different spin-spin exchange coupling patterns. The manganese systems are characterized by exchange-coupled S = 1 states at the individual metal centers, whereas the magnetic behavior of the tetranuclear ruthenium compounds results from an exchange-coupling interaction between two S = (1)/(2) sites, identified as Ru(III)/Ru(II) mixed-valence pairs.
Collapse
Affiliation(s)
- Eberhard Waldhör
- Centre d'Etudes Nucléaires de Grenoble, DRFMC/SCIB/SCPM, 85 X, F-38054 Grenoble Cedex 09, France
| | | | | | | |
Collapse
|