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Jordan R, Schäfer SA, Sander N, Maisuls I, Hamacher C, Friedel J, Strassert CA, Klein A. Assessing the Character of the C 6F 5 Ligand from the Electrochemical and Photophysical Properties of [Ni(C 6F 5) 2(N ∧N)] Complexes. Inorg Chem 2024; 63:11079-11091. [PMID: 38843524 DOI: 10.1021/acs.inorgchem.4c00649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
Organonickel complexes containing α-diimine ligands [Ni(C6F5)2(N∧N)] (N∧N = 2,2'-bipyridine (bpy), 2,9-dimethyl-1,10-phenanthroline (dmphen), 3,4,7,8-tetramethyl-1,10-phenanthroline (tmphen), dipyrido[3,2-a:2',3'-c]phenazine (dppz), 1,4-bis(isopropyl)-1,4-diazabutadiene (iPr-DAB), and 1,4-bis(2,6-dimethylphenyl)-1,4-diazabutadiene (Xyl-DAB) were prepared and studied structurally, spectroscopically, and electrochemically. Their molecular structures from single-crystal X-ray diffraction show near-perfect square planar Ni(II) coordination except in the case of dmphen. Primary reversible electrochemical reductions in the range from -1 to -2 V vs ferrocene/ferrocenium couple lead to mainly diimine-localized radical anion complexes, while secondary reductions in the range from -2 to -2.5 V lead to dianion complexes, as shown through spectroelectrochemistry. Irreversible metal-centered oxidations at around 0.7 V result in rapid aryl-aryl reductive elimination and formation of decafluorobiphenyl. No photoluminescence was detected for the complexes containing chromophoric α-diimine ligands at room temperature. At 77 K in frozen glassy 2-Me-THF matrices, weak photoluminescence was detected for the dmphen and tmphen derivatives, with broad emission bands peaking around 570 nm. All results are rationalized with the support of (TD-)DFT calculations, highlighting the role of the C6F5 ligand in different systems.
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Affiliation(s)
- Rose Jordan
- Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne, Faculty for Mathematics and Natural Sciences, Greinstrasse 6, D-50939 Köln, Germany
| | - Sascha A Schäfer
- Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne, Faculty for Mathematics and Natural Sciences, Greinstrasse 6, D-50939 Köln, Germany
| | - Noah Sander
- Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne, Faculty for Mathematics and Natural Sciences, Greinstrasse 6, D-50939 Köln, Germany
| | - Ivan Maisuls
- Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
- CeNTech, CiMIC, SoN, Heisenbergstraße 11, 48149 Münster, Germany
| | - Claudia Hamacher
- Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne, Faculty for Mathematics and Natural Sciences, Greinstrasse 6, D-50939 Köln, Germany
| | - Joshua Friedel
- Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne, Faculty for Mathematics and Natural Sciences, Greinstrasse 6, D-50939 Köln, Germany
| | - Cristian A Strassert
- Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
- CeNTech, CiMIC, SoN, Heisenbergstraße 11, 48149 Münster, Germany
| | - Axel Klein
- Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne, Faculty for Mathematics and Natural Sciences, Greinstrasse 6, D-50939 Köln, Germany
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Ringenberg M, Schnierle M, Sondermann C. Organobimetallic Nickel‐Iron Complexes, Valence Tautomer or Charge Localized Ferrocene Ligands Upon Oxidation. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202100940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mark Ringenberg
- Universität Stuttgart Institute für Anorganische Chemie Pfaffenwaldring 55 70569 Stuttgart GERMANY
| | - Marc Schnierle
- University of Stuttgart: Universitat Stuttgart Institut für Anorganische Chemie GERMANY
| | - Christina Sondermann
- University of Stuttgart: Universitat Stuttgart Institut für Anorganische Chemie GERMANY
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Scherer TM, Hartenbach I, Lissner F, Schwederski B, Hübner R, Fiedler J, Záliš S, Sarkar B, Kaim W. Analysis of Multiple Redox Sites in Complexes [M(C
5
Me
5
)(Q)(NO)]
n
, M=Ru or Os, Q=
o
‐Quinones. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202000420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Thomas M. Scherer
- Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55 D-70550 Stuttgart Germany
| | - Ingo Hartenbach
- Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55 D-70550 Stuttgart Germany
| | - Falk Lissner
- Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55 D-70550 Stuttgart Germany
| | - Brigitte Schwederski
- Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55 D-70550 Stuttgart Germany
| | - Ralph Hübner
- Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55 D-70550 Stuttgart Germany
| | - Jan Fiedler
- The Czech Academy of Sciences J. Heyrovský Institute of Physical Chemistry Dolejškova 3 18223 Prague Czech Republic
| | - Stanislav Záliš
- The Czech Academy of Sciences J. Heyrovský Institute of Physical Chemistry Dolejškova 3 18223 Prague Czech Republic
| | - Biprajit Sarkar
- 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
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