Synthesis, characterization and properties of some divalent metal(II) complexes: Their electrochemical, catalytic, thermal and antimicrobial activity studies

Nickel(II) Complexes of Hydrazone of Isoniazid and Their Magneto‐Spectral, Electrochemical, Thermal and Antimicrobial Investigations

“…The screened antifungal activities of the complexes against two fungi (Aspergillus niger and Candida albicans) show that they are less active compared to salicylic acid and appear to be moderate antifungal agents ( Table 2). The antibacterial and antifungal activities of the present complexes were also compared with the activity results of some other nickel(II) complexes having different ligands (Table 2) [14][15][16][17]. It was found that the present complexes are less potent bactericides with respect to few reported nickel(II) complexes [14,15], while some other complexes have almost comparable [16,17] or less [17] antibacterial and antifungal activities.…”

“…The antibacterial and antifungal activities of the present complexes were also compared with the activity results of some other nickel(II) complexes having different ligands (Table 2) [14][15][16][17]. It was found that the present complexes are less potent bactericides with respect to few reported nickel(II) complexes [14,15], while some other complexes have almost comparable [16,17] or less [17] antibacterial and antifungal activities. However, the experimental conditions for complexes reported in literature are different [14][15][16][17].…”

Synthesis, Antibacterial and Antifungal Activities of Some Cobalt(II) and Nickel(II) Complexes of Thiosemicarbazones

“…Complexes containing chelating ligands, which show promising biological activity, have been recently studied by ourselves [1][2][3][4][5][6][7][8][9][10][11] and others. [12][13][14][15][16][17][18][19][20][21][22] We have investigated the synthesis and characterization of cobalt(II), [1][2] nickel(II), 2-3 oxovanadium(IV), 4-5 platinum(II) 6 and some lanthanide(III) 7 complexes that contain a range of ancillary ligands such as semicarbazones, 7 thiosemicarbazones.…”

“…38 The antibacterial and antifungal activities of the present complexes were also compared with the activity results of some other cobalt(II) and nickel(II) complexes having different ligands. [42][43][44][45] It was found that the present complexes are less potent bactericides with respect to reported cobalt(II) and nickel(II) complexes 42,43 while some other complexes have almost comparable 44,45 or less 45 antibacterial and antifungal activities. However their experimental conditions are different.…”

Synthesis, Spectroscopic characterization and invitro bacterial evaluation of Ni(II) complexes of new tridentate aroylhydrazone ligands

“…all the Ni(II) complexes have same donating atoms (O, N, O), with same oxidation state of Ni(II) ion and the same octahedral geometry, hence the higher activity of the complexes compared to the ligand can be attributed to the nature of donor atoms of the ligands which are involved in the chelation. Furthermore chelation reduces the polarity of the Ni(II) ion because of the partial sharing of its positive charge with the donor groups and possibly the π electron delocalization within the whole chelate ring system that is formed during coordination [20]. These factors increases the lipophilic nature of the central metal atom and …”