Co (II), Cu (II), Mn (II), Ni (II), Pd (II), and Pt (II) complexes of bidentate Schiff base ligand: Synthesis, crystal structure, and acute toxicity evaluation

Abstract

5‐methoxy‐2‐(((2chloro‐5‐(trifluoromethyl)phenyl)imino)methyl)phenol) (HL) and its cobalt (II), copper (II), manganese (II), nickel (II), palladium (II), and platinum (II) complexes, [Co(L)2]·4H2O (1), [Cu(L)2] (2), [Mn(L)2(H2O)2]·H2O (3), [Ni(L)2] (4), [Pd(L)2] (5), [Pt(L)2] (6), were synthesized and characterized. The compounds were investigated by different physico‐chemical techniques including IR, 1H‐NMR, 13C‐NMR, UV‐Vis, mass spectroscopies, elemental and thermal analysis, magnetic susceptibility measurements, and molar electric conductivity. The molecular structures of the HL ligand and copper (II), nickel (II), and palladium (II) complexes were confirmed by X‐ray crystallography analysis on the monocrystal. Each metal ion, in these complexes, is four‐coordinated in N2O2 coordination environment. The coordination geometry of Ni2+ and Pd2+ is square planar due to cystallographically imposed inversion symmetry of the metal centers, and the coordination geometry of copper atom can be described as tetrahedrally distorted square planar. The assessed toxicity of the ligand and its complex combinations on plant cell of Triticum aestivum L. were macroscopically and microscopically consistent. The same substances were investigated for the animal cell toxicity on crustacean Artemia franciscana Kellogg, and Mn2+ complex did not record any lethal effect.

Investigation of DNA binding and bioactivities of furan cored Schiff base Cu (II), Ni (II), and Co (III) complexes: Synthesis, characterization and spectroscopic properties

“…In metal complexes, this band is shifted to lower wavenumber by 10–11 cm −1 indicating the participation of the azomethine nitrogen in coordination. [ 30 ] In the free ligand spectrum, a broad band located at 3438 cm −1 due to the phenolic ν (OH) group is disappeared in all complexes suggesting the phenolic‐OH group participation in coordination. Involvement of the deprotonated phenolic‐OH group in chelation is confirmed by the blueshift of the ν (C–O) band (shift from 1173 cm −1 to lower frequency ranging 1157–1159 cm −1 ) in the complexes.…”

Macrocyclic “tet a”-Derived Cobalt(III) Complex with a N,N′-Disubstituted Hexadentate Ligand: Crystal Structure, Photonuclease Activity, and as a Photosensitizer

“…nauplii gut has noticeable changes as observed by a phase-contrast microscope, as shown in Figure . The results suggested that complex 1 accumulation does not induce mortality after 24 h of exposure. − …”

Synthesis and Toxicity Evaluation of New Pyrroles Obtained by the Reaction of Activated Alkynes with 1-Methyl-3-(cyanomethyl)benzimidazolium Bromide

“…Crustaceans of the species Artemia franciscana Kellogg were used to determine the toxicity of the new pyrrole derivatives on the animal cell. The test assesses how many of the crustacean nauplii die in 24 h and 48 h intervals from the contact with the solutions of the tested compounds [53][54][55][56][57].…”