Syntheses and properties of a series of oxo-centered triruthenium complexes with thiocyanate and nitrite as terminal ligand

Hiroyoshi Ohtsu, Naoki Oka, Tadashi Yamaguchi

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Six new oxo-centered triruthenium complexes with NCS - or NO 2 - as a terminal ligand [Ru 3O(CH 3CO 2) 6(NCS)(L) 2] {L = 4-dimethylaminopyridine (dmap) (1); L = pyridine (py) (2)}, [PPh 4] 2[Ru 3O(CH 3CO 2) 6(NCS) 3] (3), [PPh 4] 2[Ru 3O(CH 3CO 2) 6(CO)(NCS) 2] (4), and [Ru 3O(CH 3CO 2) 6(NO 2)(L) 2] {L = dmap (5); L = py (6)} were prepared. The thiocyanate is coordinated through N atom for all NCS - complexes. While dmap complex 5 was obtained as single isomer with N-coordinate nitrite, py complex 6 was obtained as a mixture of two isomers involving coordination mode of nitrite. The linkage isomerization is too fast to allow separation of these isomers and it was confirmed by saturation transfer technique on 1H NMR. These compounds show reversible redox behavior and the redox potentials suggest that these anionic ligands are slightly electron donating than pyridine derivatives. Crystal structures of [Ru 3O(CH 3CO 2) 6(NCS)(C 5H 5N) 2] ·2CH 2Cl 2 were determined by X-ray crystallography. Although the complex has mixed terminal ligand, the Ru 3O core is almost equilateral.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalInorganica Chimica Acta
Publication statusPublished - 2012 Mar 30



  • Cluster compounds
  • Linkage isomer
  • Ruthenium complexes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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