Rhenium(I) complexes with aliphatic Schiff bases appended to bio-active moieties

Exploring the Biomolecular and Cytotoxic Activities of Novel Rhenium(I) Compounds with 2‐Aminoguanidine‐Derived Schiff Bases

“…with a ReÀ N pyridyl bond of 2.192 (2) Å. [28,[34][35] Variability of the rhenium-to-carbonyl bonds (ReÀ C1 = 1.923(6) Å, ReÀ C10 = 1.932(6) Å, ReÀ C11 = 1.976(5) Å for 1 and ReÀ C12 = 1.930(6) Å, ReÀ C13 = 1.938(8) Å, ReÀ C14 = 1.911(8) Å for 2) are accounted to the trans-influence imposed on by their different donor atoms. The trend in the ReÀ C � O bond distances was also comparable in the luminescent fac-[Re(CO) 3 (Taquin)Br] (Taquin = 1-[2-quinolinyl]-1,2,3-triazole) for the ReÀ CO coordination sphere (1.903(6) -2.061(6) Å) as well as its ReÀ Br (of 2.6008(6) Å) (ReÀ Br1 = 2.5975(7) Å for 1 and ReÀ Br = 2.5884(9) Å for 2) and Re-N pyridyl (of 2.259(4) Å) bonds.…”

“…The coordination bonds of the new mononuclear metal compounds are also in agreement with those found in literature. In particular, the Re‐N imino (Re−N2=2.189(5) Å for 1 and 2.169(5) Å for 2 ), Re‐N benzothiazole (Re−N1=2.191(5) Å for 1 ) and Re‐N pyridyl bonds (Re−N1=2.248(7) Å for 2 ) are similar to the dinuclear rhenium(I) compound, ( μ ‐mbt) 2 [Re(CO) 3 ] 2 (Hmbt=1‐(benzothiazol‐2‐ylidene)‐3‐methylthiourea) with a Re‐N benzothiazole bond of 2.205(9) Å, fac ‐[Re(bzta)(CO) 3 Cl] (bzta=2‐((5‐hydroxypentylimino)methyl)benzothiazole) with respective Re‐N imino and Re‐N benzothiazole bonds of Re−N1=2.182(1) Å and Re−N2=2.194(1) Å as well as fac ‐[Re(CO) 3 Cl(bzpc)] (bzpc= N ‐[1,3‐benzothiazol‐2‐ylmethylidene]pyridine‐2‐carbohydrazide) with a Re−N pyridyl bond of 2.192 (2) Å [28,34–35] . Variability of the rhenium‐to‐carbonyl bonds (Re−C1=1.923(6) Å, Re−C10=1.932(6) Å, Re−C11=1.976(5) Å for 1 and Re−C12=1.930(6) Å, Re−C13=1.938(8) Å, Re−C14=1.911(8) Å for 2 ) are accounted to the trans ‐influence imposed on by their different donor atoms.…”

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

“…[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 .…”