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Fortea-Pérez FR, Vallejo J, Mastropietro TF, De Munno G, Rabelo R, Cano J, Julve M. Field-Induced Single-Ion Magnet Behavior in Nickel(II) Complexes with Functionalized 2,2':6'-2″-Terpyridine Derivatives: Preparation and Magneto-Structural Study. Molecules 2023; 28:molecules28114423. [PMID: 37298899 DOI: 10.3390/molecules28114423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 05/23/2023] [Accepted: 05/23/2023] [Indexed: 06/12/2023] Open
Abstract
Two mononuclear nickel(II) complexes of the formula [Ni(terpyCOOH)2](ClO4)2∙4H2O (1) and [Ni(terpyepy)2](ClO4)2 MeOH (2) [terpyCOOH = 4'-carboxyl-2,2':6',2″-terpyridine and terpyepy = 4'-[(2-pyridin-4-yl)ethynyl]-2,2':6',2″-terpyridine] have been prepared and their structures determined by single-crystal X-ray diffraction. Complexes 1 and 2 are mononuclear compounds, where the nickel(II) ions are six-coordinate by the six nitrogen atoms from two tridentate terpy moieties. The mean values of the equatorial Ni-N bond distances [2.11(1) and 2.12(1) Å for Ni(1) at 1 and 2, respectively, are somewhat longer than the axial ones [2.008(6) and 2.003(6) Å (1)/2.000(1) and 1.999(1) Å (2)]. The values of the shortest intermolecular nickel-nickel separation are 9.422(1) (1) and 8.901(1) Å (2). Variable-temperature (1.9-200 K) direct current (dc) magnetic susceptibility measurements on polycrystalline samples of 1 and 2 reveal a Curie law behavior in the high-temperature range, which corresponds to magnetically isolated spin triplets, the downturn of the χMT product at lower temperatures being due to zero-field splitting effects (D). Values of D equal to -6.0 (1) and -4.7 cm-1 (2) were obtained through the joint analysis of the magnetic susceptibility data and the field dependence of the magnetization. These results from magnetometry were supported by theoretical calculations. Alternating current (ac) magnetic susceptibility measurements of 1 and 2 in the temperature range 2.0-5.5 K show the occurrence of incipient out-phase signals under applied dc fields, a phenomenon that is characteristic of field-induced Single-Molecule Magnet (SMM) behavior, which herein concerns the 2 mononuclear nickel(II) complexes. This slow relaxation of the magnetization in 1 and 2 has its origin in the axial compression of the octahedral surrounding at their nickel(II) ions that leads to negative values of D. A combination of an Orbach and a direct mechanism accounts for the field-dependent relation phenomena in 1 and 2.
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Affiliation(s)
- Francisco Ramón Fortea-Pérez
- Instituto de Ciencia Molecular (ICMol), Departament de Química Inorgànica, Universitat de València, 46980 Paterna, Spain
| | - Julia Vallejo
- Instituto de Ciencia Molecular (ICMol), Departament de Química Inorgànica, Universitat de València, 46980 Paterna, Spain
| | - Teresa F Mastropietro
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Rende, Italy
| | - Giovanni De Munno
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Rende, Italy
| | - Renato Rabelo
- Instituto de Ciencia Molecular (ICMol), Departament de Química Inorgànica, Universitat de València, 46980 Paterna, Spain
- Instituto de Química, Universidade Federal de Goiás, Goiânia 74690-900, Brazil
| | - Joan Cano
- Instituto de Ciencia Molecular (ICMol), Departament de Química Inorgànica, Universitat de València, 46980 Paterna, Spain
| | - Miguel Julve
- Instituto de Ciencia Molecular (ICMol), Departament de Química Inorgànica, Universitat de València, 46980 Paterna, Spain
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2
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KANETOMO T, Ni Z, Enomoto M. Hydrogen-Bonded Cobalt(II)-Organic Framework: Normal and Reverse Spin-Crossover Behaviours. Dalton Trans 2022; 51:5034-5040. [DOI: 10.1039/d2dt00453d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel hydrogen-bonded metal-organic framework (H-MOF) [Co(HL)2](DMF)1.2(H2O)2.4 (1·solv), in which L = 2,2’:6’,2”-terpyridine-5,5’-diyl biscarboxylate, was prepared. An intermolecular single H-bond between carboxy and carboxylate sites was present in this compound....
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3
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Li D, Liang C, Jiang Z, Zhang J, Zhuo WT, Zou FY, Wang WP, Gao GL, Song J. Visible-Light-Promoted C2 Selective Arylation of Quinoline and Pyridine N-Oxides with Diaryliodonium Tetrafluoroborate. J Org Chem 2020; 85:2733-2742. [PMID: 31906619 DOI: 10.1021/acs.joc.9b02933] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A protocol of visible-light-promoted C2 selective arylation of quinoline and pyridine N-oxides, with diaryliodonium tetrafluoroborate as an arylation reagent, using eosin Y as a photocatalyst for the construction of N-heterobiaryls was presented. This methodology provided an efficient way for the synthesis of 2-aryl-substituted quinoline and pyridine N-oxides. This strategy has the following advantages: specific regioselectivity, simple operation, good functional group tolerance, and high to moderate yields under mild conditions.
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Affiliation(s)
- Dazhi Li
- School of Life Science and Technology , Harbin Institute of Technology , Harbin , Heilongjiang 150001 , China
| | - Ce Liang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin , Heilongjiang 150001 , China
| | - Zaixing Jiang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin , Heilongjiang 150001 , China
| | - Junzheng Zhang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin , Heilongjiang 150001 , China
| | - Wang-Tao Zhuo
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin , Heilongjiang 150001 , China
| | - Fan-Yue Zou
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin , Heilongjiang 150001 , China
| | - Wan-Peng Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin , Heilongjiang 150001 , China
| | - Guo-Lin Gao
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin , Heilongjiang 150001 , China
| | - Jinzhu Song
- School of Life Science and Technology , Harbin Institute of Technology , Harbin , Heilongjiang 150001 , China
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4
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Agosti A, Kuna E, Bergamini G. Divergent Terpyridine-Based Coordination for the Construction of Photoactive Supramolecular Structures. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801263] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Amedeo Agosti
- Department of Chemistry “Giacomo Ciamician”; University of Bologna; Via Selmi 2 40126 Bologna Italy
| | - Ewelina Kuna
- Department of Chemistry “Giacomo Ciamician”; University of Bologna; Via Selmi 2 40126 Bologna Italy
| | - Giacomo Bergamini
- Department of Chemistry “Giacomo Ciamician”; University of Bologna; Via Selmi 2 40126 Bologna Italy
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5
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Giannoulis A, Ackermann K, Spindler PE, Higgins C, Cordes DB, Slawin AMZ, Prisner TF, Bode BE. Nitroxide–nitroxide and nitroxide–metal distance measurements in transition metal complexes with two or three paramagnetic centres give access to thermodynamic and kinetic stabilities. Phys Chem Chem Phys 2018; 20:11196-11205. [DOI: 10.1039/c8cp01611a] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Broadband and highly resolved EPR distance measurements reveal multimers and their kinetic stabilities.
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Affiliation(s)
- A. Giannoulis
- Biomedical Sciences Research Complex and Centre of Magnetic Resonance University of St Andrews
- St Andrews KY16 9ST
- UK
- EaStCHEM School of Chemistry
- University of St Andrews
| | - K. Ackermann
- Biomedical Sciences Research Complex and Centre of Magnetic Resonance University of St Andrews
- St Andrews KY16 9ST
- UK
- EaStCHEM School of Chemistry
- University of St Andrews
| | - P. E. Spindler
- Institute of Physical and Theoretical Chemistry and Center for Biomolecular Magnetic Resonance
- Goethe-University Frankfurt am Main
- D-60438 Frankfurt am Main
- Germany
| | - C. Higgins
- EaStCHEM School of Chemistry
- University of St Andrews
- St Andrews KY16 9ST
- UK
| | - D. B. Cordes
- EaStCHEM School of Chemistry
- University of St Andrews
- St Andrews KY16 9ST
- UK
| | - A. M. Z. Slawin
- EaStCHEM School of Chemistry
- University of St Andrews
- St Andrews KY16 9ST
- UK
| | - T. F. Prisner
- Institute of Physical and Theoretical Chemistry and Center for Biomolecular Magnetic Resonance
- Goethe-University Frankfurt am Main
- D-60438 Frankfurt am Main
- Germany
| | - B. E. Bode
- Biomedical Sciences Research Complex and Centre of Magnetic Resonance University of St Andrews
- St Andrews KY16 9ST
- UK
- EaStCHEM School of Chemistry
- University of St Andrews
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6
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Krinochkin AP, Kopchuk DS, Khasanov AF, Chepchugov NV, Kovalev IS, Santra S, Zyryanov GV, Majee A, Rusinov VL, Chupakhin ON. Unsymmetrically functionalized 5,5″-diaryl- and 5,6,5″-triaryl-2,2′:6′,2″-terpyridines: an efficient synthetic route and photophysical properties. CAN J CHEM 2017. [DOI: 10.1139/cjc-2017-0195] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
An efficient approach for the synthesis of 5,5″- or 5,6,5″-aryl substituted 2,2′:6′,2″-terpyridines, bearing an anneleted cyclopentene unit in one of the side-chain pyridine rings for the improved solubility in organic solvents, via their 1,2,4-triazine analogues has been developed. By using this approach, various aromatic substituents were introduced in the 2,2′:6′,2″-terpyridine core. Depending on the nature of the aromatic substituents, the obtained terpyridines exhibited an intense emission in a range of ca. 344–394 nm in acetonitrile solutions. For the most representative compounds, pronounced bathochromic shifts in both absorption and emission spectra were observed compared with previously reported substituted terpyridines.
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Affiliation(s)
| | - Dmitry S. Kopchuk
- Ural Federal University, 19, Mira St., Yekaterinburg, 62000, Russian Federation
- I. Ya. Postovsky Institute of Organic Synthesis of RAS (Ural Division), 22/20, S. Kovalevskoy/Akademicheskaya St., Yekaterinburg, 62099, Russian Federation
| | - Albert F. Khasanov
- Ural Federal University, 19, Mira St., Yekaterinburg, 62000, Russian Federation
| | | | - Igor S. Kovalev
- Ural Federal University, 19, Mira St., Yekaterinburg, 62000, Russian Federation
| | - Sougata Santra
- Ural Federal University, 19, Mira St., Yekaterinburg, 62000, Russian Federation
| | - Grigory V. Zyryanov
- Ural Federal University, 19, Mira St., Yekaterinburg, 62000, Russian Federation
- I. Ya. Postovsky Institute of Organic Synthesis of RAS (Ural Division), 22/20, S. Kovalevskoy/Akademicheskaya St., Yekaterinburg, 62099, Russian Federation
| | - Adinath Majee
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Vladimir L. Rusinov
- Ural Federal University, 19, Mira St., Yekaterinburg, 62000, Russian Federation
- I. Ya. Postovsky Institute of Organic Synthesis of RAS (Ural Division), 22/20, S. Kovalevskoy/Akademicheskaya St., Yekaterinburg, 62099, Russian Federation
| | - Oleg N. Chupakhin
- Ural Federal University, 19, Mira St., Yekaterinburg, 62000, Russian Federation
- I. Ya. Postovsky Institute of Organic Synthesis of RAS (Ural Division), 22/20, S. Kovalevskoy/Akademicheskaya St., Yekaterinburg, 62099, Russian Federation
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7
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Maroń A, Kula S, Szlapa-Kula A, Świtlicka A, Machura B, Krompiec S, Małecki JG, Kruszyński R, Chrobok A, Schab-Balcerzak E, Kotowicz S, Siwy M, Smolarek K, Maćkowski S, Janeczek H, Libera M. 2,2′:6′,2′′-Terpyridine Analogues: Structural, Electrochemical, and Photophysical Properties of 2,6-Di(thiazol-2-yl)pyridine Derivatives. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700141] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anna Maroń
- Department of Crystallography; Institute of Chemistry; University in Silesia in Katowice; 9 Szkolna St. 40-006 Katowice Poland
| | - Slawomir Kula
- Department of Inorganic; Organometallic Chemistry and Catalysis; Institute of Chemistry; University of Silesia in Katowice; 9 Szkolna St. 40-006 Katowice Poland
| | - Agata Szlapa-Kula
- Department of Inorganic; Organometallic Chemistry and Catalysis; Institute of Chemistry; University of Silesia in Katowice; 9 Szkolna St. 40-006 Katowice Poland
| | - Anna Świtlicka
- Department of Crystallography; Institute of Chemistry; University in Silesia in Katowice; 9 Szkolna St. 40-006 Katowice Poland
| | - Barbara Machura
- Department of Crystallography; Institute of Chemistry; University in Silesia in Katowice; 9 Szkolna St. 40-006 Katowice Poland
| | - Stanisław Krompiec
- Department of Inorganic; Organometallic Chemistry and Catalysis; Institute of Chemistry; University of Silesia in Katowice; 9 Szkolna St. 40-006 Katowice Poland
| | - Jan Grzegorz Małecki
- Department of Crystallography; Institute of Chemistry; University in Silesia in Katowice; 9 Szkolna St. 40-006 Katowice Poland
| | - Rafał Kruszyński
- Department of X-ray Crystallography and Crystal Chemistry; Institute of General and Ecological Chemistry; Technical University of Lodz; 116 Żeromski St. 90-924 Łódź Poland
| | - Anna Chrobok
- Department of Chemical Organic Technology and Petrochemistry; Silesian University of Technology; 4 Krzywoustego St. 44-100 Gliwice Poland
| | - Ewa Schab-Balcerzak
- Department of Polymer Chemistry; Institute of Chemistry; University of Silesia in Katowice; 9 Szkolna St. 40-006 Katowice Poland
- Centre of Polymer and Carbon Materials; Polish Academy of Sciences; 34 M. Curie-Sklodowska St. 41-819 Zabrze Poland
| | - Sonia Kotowicz
- Department of Polymer Chemistry; Institute of Chemistry; University of Silesia in Katowice; 9 Szkolna St. 40-006 Katowice Poland
| | - Mariola Siwy
- Centre of Polymer and Carbon Materials; Polish Academy of Sciences; 34 M. Curie-Sklodowska St. 41-819 Zabrze Poland
| | - Karolina Smolarek
- Institute of Physics; Faculty of Physics, Astronomy and Informatics; Nicolaus Copernicus University; 5 Grudziadzka St. 87-100 Torun Poland
| | - Sebastian Maćkowski
- Institute of Physics; Faculty of Physics, Astronomy and Informatics; Nicolaus Copernicus University; 5 Grudziadzka St. 87-100 Torun Poland
| | - Henryk Janeczek
- Centre of Polymer and Carbon Materials; Polish Academy of Sciences; 34 M. Curie-Sklodowska St. 41-819 Zabrze Poland
| | - Marcin Libera
- Department of Polymer Chemistry; Institute of Chemistry; University of Silesia in Katowice; 9 Szkolna St. 40-006 Katowice Poland
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8
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Iranmanesh H, Arachchige KSA, Bhadbhade M, Donald WA, Liew JY, Liu KTC, Luis ET, Moore EG, Price JR, Yan H, Yang J, Beves JE. Chiral Ruthenium(II) Complexes as Supramolecular Building Blocks for Heterometallic Self-Assembly. Inorg Chem 2016; 55:12737-12751. [DOI: 10.1021/acs.inorgchem.6b02007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | | | | | | | - Jane Y. Liew
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland, Australia
| | | | | | - Evan G. Moore
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Jason R. Price
- Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Hong Yan
- Key State Laboratory for Coordination Chemistry, Nanjing University, Nanjing, China
| | - Jiajia Yang
- Key State Laboratory for Coordination Chemistry, Nanjing University, Nanjing, China
| | - Jonathon E. Beves
- Key State Laboratory for Coordination Chemistry, Nanjing University, Nanjing, China
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9
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Zhang AJ, Chen CJ, Lou DY, Miao YH, Qiao CX, Hu JB. Nickel(II), Cadmium(II), and Copper(II) Complexes Based on Ditopic Terpyridine Derivative Ligand: Syntheses, Crystal Structures, and Luminescent Properties. Z Anorg Allg Chem 2016. [DOI: 10.1002/zaac.201600156] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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10
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Alghool S, Slebodnick C. Mn (II) Complexes Based on Oligopyridines: Structure, Thermal Studies and Optical Band-Gap Determination. JOURNAL OF CHEMICAL RESEARCH 2016. [DOI: 10.3184/174751916x14558218716443] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Two cationic complexes [Mn(II)(terpy)2]·2(PCP) and [Mn(II)(dipy)3]·2(PCP) (terpy = 2,2′:6′,2″-terpyridine) (dipy = 2,2-dipyridyl) (PCP = pentacyanopropenide) have been synthesised. Single crystal X-ray diffraction revealed that the PCP ligand acts as a counter ion. The thermal stability of these compounds was investigated. Optical absorption measurements show that the fundamental absorption edge obeys Tauc's relation for the allowed non-direct transition. The optical band gap (Eg) values equal ~2.7 eV for both complexes.
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Affiliation(s)
- Samir Alghool
- Department of Chemistry, Faculty of Science, Port Said University, Port Said, Egypt 42521
- Department of Chemistry, Faculty of Science, Taif University, KSA 5700
| | - Carla Slebodnick
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA 24061
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11
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New ruthenium(II) complexes of 2,2′:6′,2″-terpyridine derivatives as supramolecular building blocks. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.06.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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12
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Klosterman JK, Veliks J, Frantz DK, Yasui Y, Loepfe M, Zysman-Colman E, Linden A, Siegel JS. Conformations of large macrocycles and ring-in-ring complexes. Org Chem Front 2016. [DOI: 10.1039/c6qo00024j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A kinetically directed, stepwise approach towards molecular Borromean links enabled the isolation and structural characterization of synthetic intermediates along the way.
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Affiliation(s)
| | - Janis Veliks
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | - Derik K. Frantz
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | - Yoshizumi Yasui
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | - Michael Loepfe
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | | | - Anthony Linden
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | - Jay S. Siegel
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
- School of Pharmaceutical Science and Technology
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13
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Veliks J, Seifert HM, Frantz DK, Klosterman JK, Tseng JC, Linden A, Siegel JS. Towards the molecular Borromean link with three unequal rings: double-threaded ruthenium(ii) ring-in-ring complexes. Org Chem Front 2016. [DOI: 10.1039/c6qo00025h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Synthesis of double-threaded ruthenium(ii) ring-in-ring complexes and the Borromean link with three unequal rings detected by mass spectrometry.
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Affiliation(s)
- Janis Veliks
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | - Helen M. Seifert
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | - Derik K. Frantz
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | | | - Jui-Chang Tseng
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | - Anthony Linden
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | - Jay S. Siegel
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
- School of Pharmaceutical Science and Technology
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14
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Veliks J, Blacque O, Siegel JS. Three steps in one pot: synthesis of linear bilateral extended 2,2':6',2″-terpyridineruthenium(II) complexes. Inorg Chem 2014; 53:12122-6. [PMID: 25350686 DOI: 10.1021/ic501946f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Metal complexes of linear bilateral extended 2,2':6',2″-terpyridine [2,6-bis(2-substituted furo[2,3-c]pyridin-5-yl)pyridine] are topological tridentate analogues of 5,5'-functionalized 2,2'-bipyridine. The present methodology provides access to linear bilateral extended 2,2':6',2″-terpyridineruthenium(II) complexes starting from 5,5″-bis(methoxymethoxy)-4,4″-bis(substituted ethynyl)-2,2':6',2″-terpyridines via one-pot cleavage of the methoxymethyl (MOM) protecting group, cycloisomerization, and metal complexation in the presence of Ru(DMSO)4Cl2. In this reaction, ruthenium(II) likely plays a triple role, acting as a Lewis acid to cleave the MOM ether, a catalyst facilitating 5-endo-dig cyclization, and a coordination metal center, being an integral part of the final product.
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Affiliation(s)
- Janis Veliks
- Department of Chemistry, University of Zurich , Winterthurerstrasse 190, 8057 Zurich, Switzerland
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