New coordination polymers with chromato bridges: 1∞[Ni(phen)(H2O)2(μ-O2CrO2)] and 3∞[Mn(4,4′-bipy)(H2O)(μ-O3CrO)]·H2O

•A 1-D nickel(II) coordination polymer was assembled using chromato bridges and phenanthroline as a blocking ligand.•A 3-D coordination polymer has been constructed using from Mn(II) nodes, chromato and 4,4′-bipyridine bridges.•The thermal decomposition of the manganese-chromate derivative leads to a spinel modification, Mn1.5Cr1.5O4.

Two new coordination polymers have been assembled using the chromato ions as bridging ligands: 1∞[Ni(phen)(H2O)2(μ-O2CrO2)] 1, and 3∞[Mn(4,4′-bipy)(H2O)(μ-O3CrO)]·H2O 2. In crystal 1 the chromate ions act as bridges connecting two nickel ions through two oxygen atoms, resulting in infinite chains. 1,10-Phenanthroline acts as a blocking ligand. In compound 2, each chromato ion is connected to three manganese ions, resulting in layers which are parallel to the ab plane. The layers are constructed from {Mn3Cr3} meshes, each metal atom being shared between three other meshes. The structure is expanded into the third direction by connecting the inorganic layers through 4,4′-bipy spacers. The thermal decomposition of the two compounds has been investigated.

Graphical abstractTwo new coordination polymers have been assembled using the chromato ions as bridging ligands: 1∞[Ni(phen)(H2O)2(μ-O2CrO2)] 1, and 3∞[Mn(4,4′-bipy)(H2O)(μ-O3CrO)]·H2O 2. In crystal 1 the chromate ions act as bridges connecting two nickel ions through two oxygen atoms, resulting in infinite chains. 1,10-Phenanthroline acts as a blocking ligand. In compound 2, each chromato ion is connected to three manganese ions, resulting in layers.Figure optionsDownload full-size imageDownload as PowerPoint slide