Intermolecular interaction and magnetic coupling mechanism of a mixed-valence Cu^IICu^I tetranuclear complex with iodide bridge

Stabilization of CuII–I Bonds Using 2‐Benzoylpyridine Thiosemicarbazones – Synthesis, Structure, Spectroscopy, Fluo­rescence, and Cyclic Voltammetry

“…[11] The Cu II -I bond length of 2.5749(5) Å in 4 is shorter than the sum of the covalent radii for the Cu and I atoms (1.33 + 1.35 = 2.68 Å). [10,24] [5,7,10,11,13] The coordination pattern of [Cu (7) is similar to that of 4, but this complex contains two independent molecules in the unit cell (Figure 8), and its Cu II -I bond lengths of 2.5538(7) and 2.5608(7) Å are The X-ray crystallography shows that 1 exists as a sulfurbridged dimer (Figure 9). The Cu II -I bond length of 2.6060(6) Å is somewhat longer than those in 4 and 7 but shorter than the sum of the covalent radii for the Cu and I atoms (1.33 + 1.35 = 2.68 Å).…”

“…[10] A N 3 Cu II -I 2 core with one terminal and one bridging iodido ligand was also stabilized by 1,10-phenanthroline. [11] Likewise, other metal cores such as N 3 ClCu II -I (five-coordinate), N 3 Cu II -I (four-coordinate), and N 3 CCu II -I (five-coordinate) have been stabilized by 2,4,6-tri(2-pyridyl)-1,3,5-triazine, [12] bis(2-pyridylcarbonyl)-amine, [12] and tris(2-pyridylthio)methyl ligands, [13] respectively.…”