In 2016,Ibrahim, Halliru; Bala, Muhammad Dabai published 《Earth abundant metal complexes of donor functionalised N-heterocyclic carbene ligands: synthesis, characterisation and application as amination catalysts》.New Journal of Chemistry published the findings.Computed Properties of C6H7Br2N The information in the text is summarized as follows:
Six new imidazolium salts of the form 3-R-1-picolylimidazolium bromide (1a: R = 4-nitrophenyl, 1b: R = 4-acetylphenyl, 1c: R = 4-cyanophenyl, 1d: R = allyl, 1e: R = butenyl, 1f: R = pentenyl) were synthesized and isolated in high yields. The corresponding Ag-NHC intermediate complexes 2a, 2d, and 2e were transmetalated to yield [M(NHC)2Cl2 M = Co, Ni] complexes in good to excellent yields. The Co-NHC (3a, 3d, 3e) and Ni-NHC (3a’, 3d’, 3e’) complexes were relatively stable in air, insoluble in chlorinated solvents but very soluble in methanol and DMSO. Poorly resolved NMR spectra and magnetic susceptibility values of 2.53 and 2.73 μB for 3d and 3e resp. suggest both to be paramagnetic cobalt complexes. All the imidazolium salts, isolated Ag-NHC complexes and the corresponding Co and Ni-NHC complexes were characterized by spectroscopic and anal. techniques. The complexes are active at low catalyst loading (1 mol%) for the C-N coupling of aniline with Ph bromide under mild reaction conditions. The in situ generated catalyst obtained from a mixture of NiCl2/1a (1:2 molar ratio) initiated the C-N coupling of several aryl amines with substituted aryl bromides bearing a wide variety of functional groups. Good to excellent yields of the desired diaryl amine products were obtained. The yields are comparable to data obtained with palladium catalysts or to data obtained under harsher temperature conditions of Cu mediated Ullman reactions. In the experiment, the researchers used many compounds, for example, 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Computed Properties of C6H7Br2N)
2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) belongs to pyridine. Pyridines are often used as catalysts or reagents; particular notice has been paid recently to how pyridine coordinates to metal centers enabling a wide range of valuable reactions. Computed Properties of C6H7Br2N