Probing the potential of N-heterocyclic carbenes in molecular electronics: redox-active metal centers interlinked by a rigid ditopic carbene ligand
- Mercs, Laszlo Department of Chemistry, University of Fribourg, Switzerland
- Neels, Antonia Institute of Microtechology, University of Neuchâtel, Switzerland
- Albrecht, Martin Department of Chemistry, University of Fribourg, Switzerland
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22.09.2008
Published in:
- Dalton Transactions. - 2008, vol. 41, p. 5570-5576
English
Bimetallic homonuclear iron(II) and ruthenium(II) N-heterocyclic carbene complexes have been synthesized and crystallographically analyzed. As a spacer ligand for interconnecting the two redox-active metal centers, a ditopic carbene ligand has been used that comprises two carbene sites annelated to benzene. Detailed electrochemical and spectroelectrochemical analyses of the bimetallic systems revealed that despite the potentially π-delocalized nature of the ditopic ligand, the iron centers are only moderately coupled. In the ruthenium complexes, the intermetallic interactions are very weak and the centers are electrochemically nearly independent. A model is proposed for rationalizing these observations which is based on (i) relatively weak charge delocalization in the spacer ligand and (ii) on electrostatic factors governing the metal–carbene bond.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Chimie
- Language
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- English
- Classification
- Chemistry
- License
- License undefined
- Identifiers
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- RERO DOC 10829
- DOI 10.1039/b809721f
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301051
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