The crystal structures of [(4-MepyO)(2)H](I-3(-)) and [Co(4-EtO(2)CpyO)(6)](I-8(2-)), products of aerobic decomposition from ethanolic solutions of SO2 adducts containing pyridine-N-oxide derivatives

Four samples of SO2 adducts in ethanol or toluene solutions, CuCl2(2,6-Mepy O)(2)(SO2)(0.5)(H2O)(2), CuBr2(3-HOH(2)CpyO)(2)(SO2)(0.5), MnI2(4-MepyO)(2) (SO2)(0.75)(H2O)(4) and CoI2(4-CNpyO)(2)(SO2)(0.75)(H2O)(2), were exposed t o air at room temperature by simply exposing them to air for about a month or by bubbling air into the solution for 4h and subsequent stirring for 12h . After this procedure, oxidation products and ligand derivatives, obtained from adducts where SO2 bridged between two metal centres, were isolated an d characterised. Thus, the aerobic oxidation of MnI2(4-MepyO)(2)(SO2)(0.75) (H2O)(4) and CoI2(4-CNpyO)(2)(SO2)(0.75)(H2O)(2), respectively, yield the d ecomposition products [(4-MepyO)(2)H](I-3) and [Co(4-EtO(2)CpyO)(6)](I-8), which have been crystallographically characterised. Furthermore, we have is olated and clearly identified blue crystals of CuSO4. 5H(2)O from solutions of both CuCl2(2,6-MepyO)(2)(SO2)(0.5)(H2O)(2) and CuBr2(3-HO(2)HCpyO)(2)(S O2)(0.5).