The crystal structure of pentaaquabis(2,4-dinitrophenolato)barium(II)

The crystal and molecular structure of [Ba(dnp)(2)(OH2)(5)], where dnp is 2 ,4-dinitrophenoxide, has been determined at room temperature. The coordinat ion number of the barium atom is nine with two phenoxide atoms, one nitro o xygen atom and six water molecules providing a O-9 donor set that defines a distorted capped square antiprismatic geometry. The presence of bridging w ater molecules leads to the formation of dinuclear barium entities that are further linked to each other via hydrogen bonds (involving the water molec ules) which in rum results in the construction of two-dimensional networks. Successive layers are linked by the dnp molecules via weak Ba...O interact ions (>3.2 Angstrom) as well as hydrogen bonds. Evidence-is found for both intra- and intermolecular base stacking.