No abstract

No abstract

The hexadentate complex Mg[Ni(1,3-pdta)]•H2O (1,3-pdta = 1,3-propanediaminetetraacetate ion) was prepared and its structure established by X-ray crystallography. The complex salt crystallizes in the space group Pnna (# 52) of the orthorhombic crystal system with a = 13.251(2), b = 11.645(2), c = 13.818(3) Å and Z = 4. The Ni(II) ion is surrounded octahedrally by two nitrogen and four oxygen atoms of the ligand. The Mg cation is bonded octahedrally to six water molecules. Both complex ions utilize a two-fold symmetry axis that is present in the crystal. The conformations of the chelate rings were found to be envelope or twist for the glycinates and skew-boat for the six-membered diamine ring. A comparison of structures of hexadentate [M(1,3-pdta)]n− complexes shows an expected variation in their octahedral distortion depending on the central metal ion M. Some spectral characteristics of the complex studied have also been reported.

No abstract

The reactions between equimolar amounts of CuX 2 (X = NO 3 À and CF 3 SO 3 À ) and two aromatic nitrogencontaining heterocycles differing in the position of nitrogen atoms, 1,7-and 4,7-phenanthroline (1,7and 4,7-phen), were performed in ethanol/methanol at room temperature. When CuX 2 salts were mixed with 4,7-phen, two copper(II) complexes, [Cu(NO 3 ) 2 (4,7-Hphen) 2 ](NO 3 ) 2 (1) and [Cu(CF 3 SO 3 )(4,7phen) 2 (H 2 O) 2 ]CF 3 SO 3 (2), were formed. On the other hand, in the reaction of CuX 2 salts with 1,7-phen, only 1,7-HphenNO 3 (3a/b) and 1,7-HphenCF 3 SO 3 (4) were obtained as the final products. The obtained products 1-4 were characterized by spectroscopic and X-ray diffraction techniques. In the copper(II) complexes 1 and 2, the coordination geometry around the Cu(II) ion is distorted octahedral and square pyramidal, respectively. The antimicrobial potential of the copper(II) complexes 1 and 2 and corresponding compounds used for their synthesis were assessed against four different bacterial species and Candida albicans, displaying moderate growth inhibiting activity. The cytotoxic properties of the investigated complexes were also evaluated against the normal human lung fibroblast cell line (MRC-5) indicating moderate, yet more pronounced cytotoxicity than antimicrobial properties. ⇑ Corresponding author. Fax: +381 34 335 040.