Synthesis and structure of the MnII,IIcomplex salt Mn2(η1η1µ2-oda)(phen)4(H2O)2Mn2Mn2(η1η1µ2-oda)(phen)4(η1-oda)2·4H2O (odah2= octanedioic acid): a catalyst for H2O2disproportionation | Synapse