The first cobalt metallacrowns: preparation and characterization of mixed-valence cobalt(II/III), inverse 12-metallacrown-4 complexes

Theocharis C Stamatatos; Stavroula Dionyssopoulou; Georgios Efthymiou; Panayotis Kyritsis; Catherine P Raptopoulou; Aris Terzis; Ramon Vicente; Albert Escuer; Spyros P Perlepes

doi:10.1021/ic050208r

The first cobalt metallacrowns: preparation and characterization of mixed-valence cobalt(II/III), inverse 12-metallacrown-4 complexes

Inorg Chem. 2005 May 16;44(10):3374-6. doi: 10.1021/ic050208r.

Authors

Theocharis C Stamatatos¹, Stavroula Dionyssopoulou, Georgios Efthymiou, Panayotis Kyritsis, Catherine P Raptopoulou, Aris Terzis, Ramon Vicente, Albert Escuer, Spyros P Perlepes

Affiliation

¹ Department of Chemistry, University of Patras, Greece.

PMID: 15877413
DOI: 10.1021/ic050208r

Abstract

Aerobic reactions of Co(O(2)CMe)(2).4H(2)O with di-2-pyridyl ketone oxime (Hpko) in the presence of counterions (ClO(4)(-), PF(6-)) give the tetranuclear, mixed-valence cobalt(II/III) clusters [Co(II)(2)Co(III)(2)(OR)(2)(O(2)CMe)(2)(pko)(4)S(2)]X(2) [R = H, S = MeOH, X = ClO(4) (1); R = Me, S = EtOH, X = PF(6) (2)] depending on the solvent mixture. Complexes 1 and 2 are the first Co members in the family of metallacrowns adopting the extremely rare inverse 12-metallacrown-4 motif.