The chemistry of cobalt acetate—IV. The isolation and crystal structure of the symmetric cubane, tetrakis[(μ-acetato)(μ3-oxo) (pyridine)cobalt(III)] · chloroform solvate, [Co4(μ3-O)4(μ-CH3CO2)4(C5H5N)in4] · 5CHCl3 and of the dicationic partial cubane, trimeric, [(μ-acetato)(acetato)tris(μ-hdyroxy(μ3-oxo) hexakispyridinetricobalt(III)]hexafluorophosphate · water solvate, [Co3(μ3-O)(μ-OH)3(μ-CH3CO2(CH3CO2(C5H5N)6[PF6]2 · 2H2O