No abstract

No abstract

No abstract

Here, L1 (2-(pyridin-2-yl)quinoxaline) and L2 ((1-((1H-pyrrol-2yl)ethylidene)benzene-1,2-diamine) ⋅ (1-(1H-pyrrol-2yl)ethanone)) were synthesized and reacted with CoCl 2 ⋅ 6H 2 O and NiCl 2 ⋅ 6H 2 O to produce complexes 1-4. We found several interesting pieces of crystal structure information. Firstly, ligands L1 and L2 with completely different molecular structures were obtained by reacting the precursors containing similar N-heterocycles with 1,2-diaminobenzene. Secondly, in methanol and DMF solvents, 1 showed two structures, the binuclear and mononuclear cobalt complexes 1 a and 1 b.Finally, the structure of 4 showed the formation of a new 2 : 1 type ligand at eutectic L2 in the presence of a Ni 2 + template. Upon treatment with AIBN, 1-4 showed moderate to high activities for MMA polymerization, producing PMMA with low to high molecular weights (2.02 ∼ 73.03 × 10 4 g⋅mol -1 ) and moderate dispersity indices (PDI: 1.72 ∼ 3.32). Moreover, 1 b displayed higher catalytic activities (up to 1.138 × 10 5 g mol À 1 ⋅ h À 1 ), which was 20 times higher than that of 3 and more than 7 times higher than that of 1 a.

No abstract