Acta Cryst. (2003). E59, m1129-m1130  [ doi:10.1107/S1600536803024875 ]

Hexaaquanickel(II) dichromate bis(hexamethylenetetramine) monohydrate

P. Dagur, D. Chopra, A. S. Prakash, T. N. Guru Row and M. S. Hegde

Abstract: A novel compound consisting of a hydrated metal cation, an organic molecule, an inorganic complex anion and water of crystallization has been synthesized and is found to crystallize in the monoclinic space group P2₁/c. The structure of the title compound, [Ni(H₂O)₆][Cr₂O₇]·2C₆H₁₂N₄·H₂O, contains octahedrally coordinated nickel ions and discrete dichromate anions. The hexamethylenetetramine molecules have no direct coordination to the metal ions. There are two cations, two anions, four tetramine molecules and two uncoordinated water molecules in the asymmetric unit. The structure is stabilized by extensive intra- and intermolecular hydrogen bonding.

Online 15 November 2003

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