Synthesis, characterization and crystal structure of platinum(II) complexes with thiourea derivative ligands

Abstract

Thiourea derivatives [N-(di-n-propylcarbamothioyl)-4-fluorobenzamide (HL1) and N-(di-n-propylcarbamothioyl)-4-bromobenzamide (HL2)] and their platinum complexes have been successfully synthesized and structurally characterized by spectroscopic 1H NMR, 13C NMR, COSY, HMQC, and FT-IR techniques. The structure of both complexes was also confirmed by single crystal X-ray diffraction studies. The study of X-ray single crystal diffraction shows that the supramolecular aggregation of the complexes is stabilized via weak interactions as well as stacking interactions such as C-H···π and π···π. The cis-[Pt(L1-S,O)2 showed C–H···π and π···π stacking interactions, whereas only C–H···π stacking interaction was observed in cis-[Pt(L2-S,O)2]. In addition, the strong classical and non-classical intermolecular hydrogen bonds are not found in the prepared complexes. Therefore, it can be said that the C–H···π and π···π stacking interactions play an important role in the formation of supramolecular structures of the complexes.

Dual-Functional CuO-Decorated Bi3.84W0.16O6.24/Bi2WO6 Nanohybrids for Enhanced Electrochemical Hydrogen Evolution Reaction and Photocatalytic Cr(VI) Reduction Performance

“…From a thermodynamic point of view, the photoexcited electrons in the CB of Bi 3.84 W 0.16 O 6.24 will migrate into the CB of Bi 2 WO 6 , which further transfer to the CB of CuO; hence, the electron−hole recombination was effectively suppressed. 37,38 This electron transfer was also confirmed from XPS analysis, wherein a positive binding energy shift was observed in the case of Bi 4f and W 4f in CuO/biphase-BW, which correlates to electron scarcity in biphase-BW. Photoexcited electrons in the CB of nanohybrids effectively reduce Cr(VI).…”

Ru(II) and Ru(III) complexes containing N‐acylthiourea ligands: Supramolecular structures and synthons, reduction, and reaction pathway of aromatic nitro compounds

“…When the 1 H NMR data of the ruthenium complexes synthesized in the structure [RuCl(CO)(PPh 3 ) 2 L] are collectively evaluated, the signal of the N H proton (δ 8.26–8.19 ppm) that appeared in the 1 H NMR spectra of the ligands is not observed in the complex 1 H NMR spectrum. When the ligand formed a monoanionic bidentate with the Ru(II) center through oxygen and sulfur atoms, it seems that amidic protons (C(O)‐NH‐C(S) moiety) underwent deprotonation 37–40 . The aromatic proton for the ligands appears at δ 7.43–7.83 ppm.…”

Antimicrobial efficacy of a hemilabile Pt(ii)–NHC compound against drug-resistant S. aureus and Enterococcus

“…1C). 30 Recently, Frei et al have reported antibacterial activity of [PtCl 2 (COD)] and its derivatives against S. aureus and observed a significantly higher activity when halogens are maintained as co-ligands (Fig. 1D).…”

“…31 Several groups have investigated Pt-nanoparticle-and Pt(II)-complex-based antimicrobials. 30,[32][33][34] These examples reveal the potential of Pt-based compounds for use as antimicrobial agents where access to the metal ions is controlled by the choice of ligands.…”