The Complexes [OsCl₂(azole)₂(dmso)₂] and [OsCl₂(azole)(dmso)₃]: Synthesis, Structure, Spectroscopic Properties and Catalytic Hydration of Chloronitriles

Abstract

(5), pyrazole (6), benzimidazole (7) and imidazole (8)] have been prepared by taking advantage of the destabilising trans effect of the Sbonded dmso ligands. These complexes have been characterised by microanalysis, IR, UV/Vis, 1 H and 13 C NMR spectroscopy, electrospray mass spectrometry, cyclic voltammetry and X-ray crystallography. They have been found to catalyse

Synthesis and structural characterisation of tetrahedral zinc(II) and trigonal bipyramidal cadmium(II) complexes containing N′-cyclohexyl substituted N,N-bispyrazolyl ligand

“…Moreover, despite numerous reports on metal complexes with N-donor ligands [33,34], little is known regarding pyrazolyl-based late transition metal complexes as catalysts for methyl methacrylate polymerisation [35][36][37] compared with early transition metal complexes [38][39][40][41] because late transition metal complexes are generally more tolerant towards polar functional monomers (including MMA) due to their less-oxophilic nature. In contrast, the steric and electronic properties of pyrazolyl-based ligands can be fine-tuned by an appropriate choice of substitutions on the 2-N, 3-C, 4-C, and 5-C atoms of the pyrazole moiety [42][43][44][45], and have been employed in diverse potential applications [46][47][48][49][50]. In view of these promising features of pyrazolyl-based ligands, we focused on the synthesis, characterisation, and reactivity of various transition metal complexes with pyrazolyl-based ligands and their catalytic activities towards MMA polymerisation [18,51,52].…”

The Hydration of Chloroacetonitriles Catalyzed by Mono‐ and Dinuclear RuII‐ and OsII‐Arene Complexes

“…Recently, a new type of Os complexes was found to be a good catalyst for the conversion of chloronitriles to the corresponding amides with high selectivity [39]. Herein, the catalytic activities of Ru II -and Os II -arene complexes derived from different pyranone and pyridinone systems are reported for the hydration of chloroacetonitriles as test systems.…”

Phosphite‐Derivatized Ruthenium‐Carbohydrate Complexes in the Catalytic Hydration of Nitriles. Short Communication

“…The 1 H-NMR spectra were recorded in (D 6 )DMSO with a Bruker FT-NMR spectrometer Avance III TM using standard pulse programs at 500.10 MHz. The catalytic experiments were performed according to a procedure described in [22]. …”

“…Reaction Scheme for the Hydration of Nitriles H 2 O 1 : 7, 1 : 6, and 1 : 6 for trichloroacetonitrile, dichloroacetonitrile, and monochloroacetonitrile, resp. ), and stirring the solution under Ar in a Schlenk tube for 24 h at 758 [22]. In parallel, control experiments were carried out under similar conditions without the catalysts.…”