Crystal structure, spectroscopic characterization and computational studies of a Re(I) tricarbonyl-diimine complex with the N,N′-bis(2-methylbenzaldehyde)-1,2-diiminoethane Schiff base

Carbon nitride as a ligand: edge-site coordination of ReCl(CO)3-fragments to g-C3N4

“…The IR spectra show that in strongly-coordinating solvents, such as MeCN and ethanol, significant leaching occurs, indicating that g-C 3 N 4 is a weak donor ligand. Other ReCl(CO) 3 complexes with common Ndonor ligands such as triazole, 21 imidazole, 22 and imines, 23 show carbonyl bands at lower energies broadly similar to those obtained for [ReCl(bpy)(CO) 3 ] (Table 1). However, similar CO band positions are observed for the weak κ 2 N, N' donor ligand dimethylglyoxime (DMG), in the complex [ReCl(CO) 3 (DMG)] which exhibits CO bands at 2032, 1938, 1916 cm -1 , 24 similar to those of [ReCl(CO) 3 (g-C 3 N 4 )] (Table 1).…”

Thermal Properties and Crystal Structures of Rhenium(I) Carbonyl Complexes with Tridentate Ligands: Preparation of Rhenium-Containing Ionic Liquids

“…The Re–S bond lengths in [ 1′-Cl ] are 2.4847(8) and 2.5006(8) Å, while the Re–N bond lengths in [ 2-Cl ] are 2.230(8) and 2.304(9) Å. The coordination geometries of [ 1-Cl ] and [ 2-Cl ] are similar to those of similar S-coordinated and N-coordinated complexes, respectively.…”

“…Although both complexes have an octahedral coordination structure, the tridentate ligand exhibits bidentate coordination, and one of its donor atoms is free. [2-Cl] exhibits severe disorder where the uncoordinated terminal amino group and pentyl group are exchanged (Figure 6b), and their occupancy ratios are 0. to those of similar S-coordinated 27 and N-coordinated complexes, 28 respectively.…”

“…[22][23][24][25][26] There are many neutral bidentate complexes with an anionic ligand. [27][28][29][30][31] However, little is known about their thermal properties. In addition, the examples of Re-containing ionic liquids are limited to onium salts with ReO4 anions.…”

“…Interest has recently increased in Re­(I) tricarbonyl complexes with regard to their application as radiopharmaceuticals, , photocatalysts, , CO delivery agents, optical materials, , supramolecular systems, etc. In particular, a number of cationic complexes fac -[Re­(CO) 3 L ] + with various tridentate chelating ligands ( L ) have been synthesized. − There are many neutral bidentate complexes with an anionic ligand. − However, little is known about their thermal properties. In addition, the examples of Re-containing ionic liquids are limited to onium salts with ReO 4 anions .…”