A Symmetric Co(N ) (H O) ⋅4 H O High-Nitrogen Compound Formed by Cobalt(II) Cation Trapping of a Cyclo-N Anion.

The reactions of (N ) (H O) (NH ) Cl with Co(NO ) ⋅6 H O at room temperature yielded Co(N ) (H O) ⋅4 H O as an air-stable orange metal complex. The structure, as determined by single-crystal X-ray diffraction, has two planar cyclo-N rings and four bound water molecules symmetrically positioned around the central metal ion. Thermal analysis demonstrated the explosive properties of the material.