Dinickel complexes with anthyridine-based ligands

Abstract

Two new dinickel complexes with anthyridine-based ligands, 5-phenyl-2,8-bis(2-pyridinyl)-1,9,10-anthyridine () and 5-phenyl-2,8-bis(6'-bipyridinyl)-1,9,10-anthyridine (), are reported. Complexation of Ni(OAc)2 with and in trifluoroacetic acid provided the corresponding dinickel complexes [{Ni2()(H2O)6(CF3COO)2}(CF3COO)2] () and [Ni2()(CF3COO)4(H2O)] (), respectively. Both complexes were characterized by spectroscopic methods and further confirmed by X-ray crystallography. Structural analyses of and revealed the NiNi distances in the complexes to be 5.4086(6) and 5.0138(7) Å, respectively. The catalytic activities of complexes and toward the reduction of carboxylic acids were evaluated. It appears that complex shows a good catalytic activity toward the reduction of carboxylates into the corresponding alcohols by diphenylsilane.

Trends in the Usage of Bidentate Phosphines as Ligands in Nickel Catalysis

“…The addition of 2 equiv of DPPE relative to complex X increases the yield of the reaction to 70%, but P­( n Bu) 3 is better with an 84% yield. The best reductant is Ph 2 SiH 2 …”

“…Liu and co-workers 564 inspected a benzoic acid reduction catalyzed by a binuclear Ni complex (complex 16a, eq 205) with anthyridine-based ligands. The addition of 2 equiv of DPPE relative to complex X increases the yield of the reaction to 70%, but P( n Bu) 3 is better with an 84% yield.…”

Synthesis, characterization and photocatalytic activity of BiOX (X = Cl, I, Br) and their composites with carbon nanotubes (CNT)

“…The low specific surface area of composites is also evident from XRD due to higher primary crystallite size. These low values for specific surface area for our samples is usual in the case of bismuth-based or bismuth oxyiodides as discussed in [147]. The detailed list of average primary particle size, specific surface areas and band gap energy values of all BiOI and BiOI/CNT samples is provided in Appendix 2.…”