1365441-35-5Relevant academic research and scientific papers
Dinickel(ii) complexes: Preparation and catalytic activity
Cheng, Ting-Peng,Liao, Bei-Sih,Liu, Yi-Hung,Peng, Shie-Ming,Liu, Shiuh-Tzung
, p. 3468 - 3473 (2012)
Ligands (La-c) based on 2,7-bis(3,5-di-R-pyrazol-1-yl)-1,8- naphthyridine (a, R = H; b, R = CH3; c, R = Ph) were prepared for the construction of a series of dinickel complexes. Treatment of Lx with NiCl2 in an anhydrous methanol/THF solution resulted in the formation of dinuclear complexes [(Lx)(μ-Cl)2Ni 2Cl2(CH3OH)2] (3, x = a; 4, x = b; 5, x = c). These new complexes were characterized by elemental analysis, IR and UV-Vis spectroscopic techniques. The structures of complexes 3 and 4 were further confirmed by X-ray diffraction studies. Interestingly, crystals of 4 were obtained as a co-crystallization of 4 and the methanol substituted species [{(Lb)(μ-Cl)2Ni2Cl(CH3OH) 3}Cl] (4′). These dinickel complexes have been tested in the catalytic homo-coupling of terminal alkynes with the use O2 as the oxidant, showing excellent activities. A clear improvement on the catalytic activity of these complexes is observed as compared to the mono-nuclear species. The Royal Society of Chemistry 2012.
