Two cyanide-bridged compounds composed of Schiff base–manganese(III) building block with dicyanamido and hexacyanocobaltate(III) as ligands: Crystal structure, thermostability and magnetic property

Two coordination polymers containing the dicyanamide ligand: Synthesis, crystal structures, and HFEPR studies

“…[6] In particular, the cyano group has been used extensively as a versatile mediator for magnetic coupling in molecule-based magnets. [10] The larger pseudohalide ligand dicyanamide (dca) has three potential nitrogen-donor sites and coordinates to metal ions in various modes (see Scheme 1). These different coordination modes allow for the preparation of compounds with various molecular architectures including mono-and polynuclear systems, as well as one-, two-and three-dimensional networks.…”

“…The N-Ni-N angles range from 78.14(9) to 94.51(10) o when the nitrogen atoms are neighbors in the octahedron and are all less than 180 o (when the nitrogen atoms are on opposite summits of the octahedron). Nevertheless, two groups of angles can be distinguished: when two nitrogen atoms are connected by a two-carbon-atom bridge from the dmdpy ligand, the correspondingN1 i -Ni-N1 angle is small (78.14 (9) o ) and, for independent nitrogen atoms (no direct carbon link), the angles are larger (94.51(10) o ).…”