The first cobalt metallacrowns: preparation and characterization of mixed-valence cobalt(II/III), inverse 12-metallacrown-4 complexes.
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.
Stamatatos
Theocharis C
TC
Department of Chemistry, University of Patras, Greece.
Dionyssopoulou
Stavroula
S
Efthymiou
Georgios
G
Kyritsis
Panayotis
P
Raptopoulou
Catherine P
CP
Terzis
Aris
A
Vicente
Ramon
R
Escuer
Albert
A
Perlepes
Spyros P
SP