Mono- and binuclear ruthenium corroles: Synthesis, spectroscopy, electrochemistry, and structural characterization

Liliya Simkhovich, Inna Luobeznova, Israel Goldberg, Zeev Gross*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

The aim of this research was to prepare mononuclear ruthenium corroles, because of the well-documented potency of analogous porphyrin complexes in catalysis. The syntheses of the mononuclear nitrosyl complexes [Ru(tpfc)(NO)] and [Ru(tdcc)(NO)] (tpfc=trianion of 5,10,15-tris(pentafluorophenyl)corrole, tdcc=trianion of 5,10,15-tris(2,6-dichlorophenyl)corrole), and of the binuclear [{Ru(tpfc)}2] were achieved by using [{Ru(cod)Cl2}x] (cod=cyclooctadiene) as the metal source. The NMR spectra of all three complexes clearly demonstrate that they are diamagnetic; this is consistent with a triple bond between the metal ions in [{Ru(tpfc)}2] and is expected for classical {MNO}6 complexes. These features were further substantiated by the stretching frequencies of the {MNO} moieties, electrochemical measurements on all complexes, and the X-ray crystal structures of [Ru(tpfc)(NO)] and [{Ru(tpfc)}2]. A comparison of the spectroscopic and structural characteristics of these new complexes with analogous iron corroles, as well as with iron and ruthenium porphyrins, suggests that it will be hard to obtain mononuclear ruthenium corroles without π-accepting ligands.

Original languageEnglish
Pages (from-to)201-208
Number of pages8
JournalChemistry - A European Journal
Volume9
Issue number1
DOIs
StatePublished - 3 Jan 2003

Keywords

  • Cyclic voltammetry
  • Iron
  • NMR spectroscopy
  • Porphyrinoids
  • Ruthenium
  • X-ray diffraction

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