Chemistry of molybdenum with hard-soft donor ligands. 2. Molybdenum(VI), -(V), and -(IV) oxo complexes with tridentate Schiff base ligands

Thiosemicarbazone copper complexes as competent catalysts for olefin cyclopropanations

“…All aldehydes and thiosemicarbazide were of reagent grade and used as purchased. Thiosemicarbazones, 1e8 and 10e11, were prepared according to a slightly modified procedure with respect to what reported in the literature [27]. 2-Hydroxybenzaldehyde N-ethylthiosemicarbazone (9) was purchased from SigmaeAldrich.…”

Exploring oxorhenium ‘3+1’ mixed-ligand complexes carrying the S-benzyl-3-[(2-hydroxyphenyl)methylene]dithiocarbazate [ONS]/monothiol [S] donor set: synthesis and characterization

“…The [ONS] mode of metal complexation, i.e. through phenolic oxygen, azomethine nitrogen and thiol sulfur of B, is ascertained from the red-shift (15-20 cm −1 ) of the ν(C=N) [27] and blue-shift (30-35 cm −1 ) of the ν(C-O) vibrations of the parent ligand (1619 and 1570 cm −1 , respectively) [28]. The tendency of the Schiff base to shift the equilibrium from thione form A to thiolo form B may be attributed to stabilization arising from the conjugation of the −C=N-N=C group upon coordination to the ReO(V) core [29].…”

In-vitro antibacterial, antifungal activity of some transition metal complexes of thiosemicarbazone Schiff base (HL) derived from N4-(7′-chloroquinolin-4′-ylamino) thiosemicarbazide

“…Thiosemicarbazones that are most widely studied are sulfur and nitrogen consisting ligands [4,5]. Besides, thiosemicarbazones have emerged as an important sulfur containing ligands in the last two decades [6][7][8][9]. The real impetus towards coordination chemistry is the wide range of biological properties depending on parent aldehyde or ketone including antitumour [10,11], antibacterial, and antifungal [12,13] as well as their physicochemical effects [14,15].…”