Search

A series of copper(II) complexes with different anions of composition [CuPhen(Hpz)2X2] (Phen = 1,10-phenanthroline; Hpz = pyrazole; X = CF3COO− (1), Otf− (2), Cl− (3), Otf = CF3SO3) have been synthesized. The structures of all obtained complexes were determined by direct X-ray diffraction analysis. In complexes 1–3 the equatorial planes are occupied by N-donor ligands, while the axial positions belong to the anions of various acids. Crystal structures 1–3 are additionally stabilized by hydrogen bonds, the type of which depends on the nature of the anion. The stability of the complexes upon dissolution in 0.9% NaCl was confirmed by UV-vis spectroscopy. The study of the biological properties of 1–3 showed high antibacterial activity against the non-pathogenic strain of Mycolicibacterium smegmatis (MIC (minimum inhibiting concentration) = 8–10 nmol per disk). The cytotoxic effect of various concentrations of complexes 1–3 on human ovarian adenocarcinoma cells (SKOV3) and human dermal fibroblasts (HDF) was measured in vitro. All complexes exhibit high anticancer activity, exceeding the activity against healthy cells. [ABSTRACT FROM AUTHOR]

[Display omitted] The unique palladium(ii) complexes, namely, (Phen)Pd((CF 3) 2 pz) 2 , (Phen)Pd(MeCF 3 pz) 2 , and [(Phen)Pd 2 (μ-dmpz) 2 (dmpz)(Hdmpz)](OAc) 2 H, where (CF 3) 2 pzH is 3,5-bis(trifluoro methyl) pyrazole, MeCF3pzH is 3-methyl-5-trifluoro methylpyrazole, Hdmpz is 3,5-dimethyl- pyrazole, Phen is 1,10-phenanthroline, have been obtained by the reactions of (Phen)Pd(OAc) 2 with the corresponding free NH -pyrazoles. According to the X-ray data, in the mononuclear pyrazolate complexes the Pdii atom has a square planar environment of nitrogen atoms of phenanthroline and two monodentate-bound pyrazolate anions. The binuclear pyrazolate-bridged complex is additionally stabilized by intramolecular hydrogen bonding of the terminal dmpz anion and Hdmpz. [ABSTRACT FROM AUTHOR]