Acta Cryst. (2001). E57, m43-m45  [ doi:10.1107/S1600536800020389 ]

cis-Aquabis(2,2'-bipyridine-N,N')[dichromato(2-)-O¹]nickel(II)

N. Fernández-González, C. González-Silgo, J. González-Platas, P. Gili and P. Martín-Zarza

Abstract: The molecular structure of the title compound, [Ni(C₁₀H₈N₂)₂(H₂O){Cr₂O₇}], contains an Ni^II atom with a distorted cis-octahedral coordination formed by two chelating bipyridine (bipy) ligands [mean Ni-N_bipy = 2.068 (3) Å], one water molecule [Ni-O = 2.086 (3) Å] and an O atom of the dichromate anion [Ni-O = 2.083 (2) Å]. One of the water H atoms is involved in the intramolecular hydrogen bond with the terminal O atom of the dichromate ligand [OO 2.743 (5) Å], whereas its second H atom participates in the intermolecular hydrogen bonding [OO 2.688 (4) Å]; the latter is responsible for the formation of the infinite chains stretching along the polar c axis of the crystal.

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