Square-planar nickel(II) and copper(II) complexes with unsymmetrical anionic tetradentate Schiff base ligands

Anticancer and antifungal activity of copper(II) complexes of quinolin-2(1H)-one-derived Schiff bases

“…In all of the four copper-ligand bond distances, the bond distances between Cu-N are significantly longer than those of Cu-O bonds. Elongated Cu-N bonds have also been observed for other Schiff base complexes [61]. The largest distortion from regular square planar geometry is shown in the trans O-Cu-N angles [145.69(11)°and 140.36(11)°].…”

Mono, di and trinuclear photo-luminescent cadmium(II) complexes with N2O and N2O2 donor salicylidimine Schiff bases: Synthesis, structure and self assembly

“…The chemistry of the metal Schiff base complexes has been paid considerable attention since long and it is still a promising area of research [1][2][3][4][5][6][7][8][9][10]. Among different Schiff bases, N 2 O donor salicylidimine Schiff bases [11][12][13], have widely been used by several groups to form different homo and hetero polynuclear complexes with several transition and non-transition metal ions [14][15][16][17][18][19][20].…”

Trialkyl borate assisted amination of fluorinated 1,3-diketones for synthesis of N,N′-1,2-phenylen-bis(β-aminoenones) and their Ni(II), Cu(II) and Pd(II) complexes

“…increased the yield of H 2 L 1,3 up to $40%. However, when B(OEt) 3 was replaced by a large excess of B(OBu) 3 , bis(b-aminoenones) H 2 L 1-3 were obtained in 65-78% yields (Scheme 2; Table 1, entry [4][5][6].…”

“…18 H 18 N 2 F 6 O 2 : C,52.99;H,4.39;N,6.87;F,27.94. Found C,53.08;H,4.69;N,6.79;F,5,6,6,7,7,4,5,5,6,6, A solution of b-methoxyenone 3 (0.20 g, 1.2 mmol) and corresponding b-aminoenone 2b,c (1.0 mmol) in pyridine (2 mL) was stirred for 2 days (TLC control), dried in vacuum and purified via a copper complex as described above. Yields of H 2 L 4,5 are given in the Table 1.…”

“…Generally, the reaction of fluorinated 1,3-diketones with diamine occurs with a comparative ease to afford mono-or bis (baminoenones) [5,6] depending on reagents ratio. However, when 1,2-diaminoarenes were applied in this reaction, fluorinated 1,5-benzodiazepines or the acidic cleavage products are usually formed [5].…”