Chemistry Letters, Vol.30, No.6, 562-563, 2001
Three-dimensional polymers with metal-oxygen and metal-ligand chains: [Mn(II)(4,4'-bipy)(2)(Cr2O7)(H2O)(2)] and [Co(II)(4,4'-bipy)(2)(Cr2O7)]
Reaction of aqueous solutions of [M(H2O)(6)](ClO4)(2) (M = Mn(II) and Co(II)) and dichromate ion with 4,4 ' -bipy provides coordination polymers with metal-oxygen chain. The structure of [Mn(4,4 ' -bipy)(2)(Cr2O7)(H2O)(2)] reveals the 2D sheet structure which is constructed by hydrogen bonding between 1D chains, while [Co(4,4 ' -bipy)(2)(Cr2O7)] shows hybrid 3D polymers which have metal-bipy square grid and the dichromate pillar forms an interpenetrated cuboidal 3D structure.