Unsymmetrical nickel (PCN) pincer complexes with a benzothiazole side-arm: Synthesis, characterization and electrochemical properties

Recent Advances in Chemistry of Unsymmetrical Phosphorus-Based Pincer Nickel Complexes: From Design to Catalytic Applications

“…It also should be mentioned that Luconi and co-authors demonstrated the synthesis of unusual benzothiazole-based unsymmetrical pincer nickel complexes 23a , 23b and 24 ( Scheme 11 ) [ 107 ]. The reaction of the corresponding benzothiazole-based pincer ligand with nickel dibromide in toluene in the presence of Et 3 N as a base leads to the bromide complex 23a .…”

“… Synthesis of benzothiazole-based unsymmetrical PCN pincer nickel complexes 23a , 23b and 24 [ 107 ]. …”

Influence of N- and P-substituents in N-aryl-phosphinoglycine ligands on the selectivity of Ni-catalysed ethylene oligomerization

“…[4][5][6] Moreover, the rising industrial demand for short-chain ethylene oligomers (but-1-ene and hex-1-ene) implies the importance of a deeper understanding of the ligand influence on the transition metalbased ethylene oligomerization catalysis to provide the basis for the future rational design of new active systems. [6][7][8][9][10][11][12][13][14][15][16][17][18] One of the most important processes for the production of linear a-olefins is the Shell Higher Olefin Process (SHOP) that involves the five-membered (P-C-C(O)-O)Ni chelate-catalysed oligomerization of ethylene. [19][20][21] It was found that chelating PCCO-ligands are able to effectively stabilize the catalytically active form of nickel complexes generated from bis(cycloocta-1,5-diene)nickel(0) Ni(COD) 2 , preventing the formation of colloidal nickel(0) during the catalysis.…”

“…4–6 Moreover, the rising industrial demand for short-chain ethylene oligomers (but-1-ene and hex-1-ene) implies the importance of a deeper understanding of the ligand influence on the transition metal-based ethylene oligomerization catalysis to provide the basis for the future rational design of new active systems. 6–18…”

Nonsymmetrical Benzene–Pyridine-Based Nickel Pincer Complexes Featuring Borohydride, Formate, Ethyl, and Nitrosyl Ligands

“…On consideration of nonprecious first-row transition metals, the scientific landscape of nickel pincer complexes is quite comprehensive and is generally dominated by symmetrical monoanionic ECE as well as ENE pincer, ligands with E being two identical donor groups that feature an aromatic anionic benzene or neutral pyridine backbone, repsectively. , In the past decade, nonsymmetrical PCN pincer ligands − became available, with nickel analogues appearing in the literature (Chart ). − These kinds of pincer ligands offer new possibilities due to the incorporation of a soft phosphorus and a hard nitrogen donor. A higher probability for the nitrogen donor to dissociate from the metal center has been reported, resulting in a vacant coordination site, making this ligand an interesting counterpart to its symmetrical relatives for homogeneous catalysis. , …”