Two complexes {[Mn3(btcit)2(H2O)2(DMF)2]·2DMF}∞ (1) and {[Mn3(btcit)2(bib)2]·2DMF}∞ (2) (H3btcit = 4,4′,4′′-[1,3,5-benzenetriyltris(carbonylimino)]trisbenzoic acid, bib = 1,4-bis(imidazol-1-yl)benzene) were obtained under the same reaction condition. Complex 1 is a two dimensional (4,4) network constructed from linear Mn3 units and btcit ligands. Complex 2, which presents an interesting two-fold interpenetrating three dimensional framework with fsf topology, was obtained by modifying complex 1 with a “pillaring” approach. Moreover, the magnetic properties of 1 and 2 have been investigated and both of them show antiferromagnetic behaviour.