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Acta Cryst. (2007). E63, m815-m817 [ doi:10.1107/S1600536807007209 ]

meso-(5,5,7,12,12,14-Hexamethyl-1,4,8,11-tetraazacyclotetradeca-1,7-diene)nickel(II) bis[dioxalato(1,10-phenanthroline)chromate(III)] octahydrate

W.-B. Wang, L.-X. Yang and Y. Lin

Abstract: The asymmetric unit of the title complex, [meso-Ni(1,7-CT)][Cr(C₂O₄)₂(phen)]₂·8H₂O (1,7-CT is 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca-1,7-diene; phen is 1,10-phenanthroline) or [Ni(C₁₆H₃₂N₄)][Cr(C₂O₄)₂(C₁₂H₈N₂)]₂·8H₂O, consists of one-half of an [Ni(1,7-CT)]²⁺ cation, one [Cr(C₂O₄)₂(phen)]^- anion and four water molecules of crystallization. The Ni^II atom (site symmetry $\\overline{1}$ ) is coordinated by four N atoms from the tetraazamacrocycle in a square-planar geometry, while the Cr^III centre has a distorted cis-CrN₂O₄ octahedral geometry. A network of [pi] - [pi] stacking interactions and O-HO and N-HO hydrogen bonds helps the formation of a three-dimensional structure.

Online 21 February 2007