Hg(II) and Ru(II) complexes of mono- and dichalcogenides of bis(diphenylphosphino)amine chelating ligands: Synthesis, characterization and catalytic activity in transfer hydrogenation of acetophenone derivatives

• Published in: Phosphorus, sulfur, and silicon and the related elements sulfur, and silicon and the related elements, 2021-11, Vol.196 (11), p.996-1003
• Main Authors: Al-Masri, Harbi Tomah, Almejled, Akram Ali
• Format: Article
• Language: English
• Subjects: Acetophenone; Bis(diphenylphosphino) amine; Carbon monoxide; catalysis; Catalytic activity; Chalcogenides; Chelation; Chemical synthesis; Crystallography; Dimers; Hydrogenation; Infrared spectroscopy; Ligands; mercury; Mercury compounds; Molecular structure; NMR; Nuclear magnetic resonance; Refluxing; Ruthenium; Ruthenium compounds; transfer hydrogenation
• ISSN: 1042-6507; 1563-5325
• DOI: 10.1080/10426507.2021.1948852

Reactions of C 10 H 7 -1-N(PPh 2 ) 2 (1) and C 10 H 7 -1-N(P(Se)Ph 2 ) 2 (2) ligands with mercury(II)iodide in equimolar ratio gave cis-[HgI 2 {1-κ 2 P,P}] (3) and cis-[HgI 2 {2-κ 2 Se,Se}] (4). Also, refluxing of monooxidized thioyl and selenoyl bis(phosphino)amine ligands C 10 H 7 -1-N(P(E)Ph 2 )(PPh 2 ) (E = S (5), Se (6)) with [Ru(CO) 3 Cl 2 ] 2 dimer afforded cis-[Ru(CO) 2 Cl 2 {5-κ 2 P,S}] (7) and cis-[Ru(CO) 2 Cl 2 {6-κ 2 P,Se}] (8). Complexes 3, 4, 7 and 8 were identified and characterized by multinuclear NMR ( 1 H, 13 C, 31 P and 77 Se NMR) and IR spectroscopy. The molecular structure of 5 was determined by single X-ray crystallography. 5 is the first structurally characterized example of this kind of κ 2 P,S -bidentate ligand. The novel ruthenium(II) complexes 7 and 8 show high catalytic activity in the transfer hydrogenation of acetophenone derivatives to 1-phenylethanol derivatives in the presence of 2-propanol as the hydrogen source.