Source of materialA methanol solution of Co(N03)2 · 6 H2O (2 mmol) was added to a methanol solution of 1,10-phenanthroline (4 mmol). The resulting red solution was stirred and refluxed for thirty minutes. After the filtrate had stood for one day in air, at room temperature a purple precipitate was obtained. Crystals of the title compound suitable for X-ray analysis were obtained by slow evaporation from a methanol solution. DiscussionThe title structure consists of [Co(C 12HgN2>2(N03)] (NO3) discrete entities. The ligand is bidentate. Each of the two molecules of the ligand is linked to the Co(II) atom via two Ν atoms. Thus the metal ion is six-coordinated, the bonding being provided by two Ν atoms per ligand molecule and two Ο atoms from the bidentate chelating nitrate group. One nitrate group acts as counter ion. The Co(II) possesses a distorted octahedral environment where, e.g., Ol, Nl, N4 and N3 form the base of the octahedron and the apical positions are occupied by 02 and N2 atoms. Deviation from 90° of the bond angles involving the chelation is observed (ZOl-Co-Nl = 89.08 (9)

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