Layered crystal structure of the trans(O5O6) isomer of potassium (1,3-propanediamine-N,N′-diacetato-N,N′-di-3-propionato)cobaltate(III) trihydrate, trans(O5O6)-K[Co(1,3-pddadp)] · 3H2O, stabilized by ionic, hydrogen bond and CO dipolar interactions

The trans(O5O6) geometry of the K[Co(1,3-pddadp)] · 3H2O complex has been established by X-ray crystallography. Potassium ions and their first coordination sphere form a two-dimensional polymeric layer. Co(III) octahedra are situated above and below this layer. Interactions between the consecutive ionic layers, besides hydrogen bonds, include dipolar carbonyl interactions formed around the centre of symmetry.