Materials Data on CoN5O9 by Materials Project
Co(NO)2NO(NO3)2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of eight nitric acid molecules, four nitroxyl molecules, and four Co(NO)2 clusters. In each Co(NO)2 cluster, Co3+ is bonded in a trigonal non-coplanar geometry to two N3+ and one O2- atom. There is one shorter (1.58 Å) and one longer (1.59 Å) Co–N bond length. The Co–O bond length is 1.91 Å. There are two inequivalent N3+ sites. In the first N3+ site, N3+ is bonded in a single-bond geometry to one Co3+ atom. In the second N3+ site, N3+ is bonded in a single-bond geometry to one Co3+ atom. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one O2- atom. The O–O bond length is 1.25 Å. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Co3+ and one O2- atom.