Hydrothermal synthesis of polymeric metal carboxylates from benzene-1,2,4,5-tetracarboxylic acid and benzene-1,2,4-tricarboxylic acid

Crystallisation of benzene-1,2,4,5-tetracarboxylic acid or benzene-1,2,4-tricarboxylic acid with divalent metal-ions Co, Mn or Zn and 2,2-bipyridyl gives coordination solids of composition [Co2(C10H2O8)(C10H8N2)2(H2O)] (1), [Co3(C9H3O6)2(C10H8N2)2(H2O)2] (2), [Mn3(C9H3O6)2(C10H8N2)2(H2O)2] (3) or [Zn3(C9H3O6)2(C10H8N2)2(H2O)2] (4). Each has a sheet structure with a distorted octahedral coordination environment.