The title compound, [NiBr(2)(C(27)H(27)NP(2))], was synthesized by the reaction of NiBr(2)(dme) (dme is 1,2-dimethoxy-ethane) with N,N-bis-(diphenyl-phosphino)isopropyl-amine in methanol/tetra-hydro-furan. The nickel(II) center is coordinated by two P atoms of the chelating PNP ligand, Ph(2)PN(iPr)PPh(2), and two bromide ions in a distorted square-planar geometry.

In the title compound, [FeCl(2)(C(18)H(12)N(2))], the Fe(II) atom is four-coordinated in a distorted tetra-hedral arrangement by an N,N'-bidentate 2,2'-biquinoline ligand and two chloride ions. In the crystal, there are extensive π-π contacts between the pyridine rings [centroid-centroid distances = 3.7611 (3), 3.7603 (4), 3.5292 (4), 3.5336 (5) and 3.6656 (4) Å].

The asymmetric unit of the title complex, [PdI(2)(C(10)H(8)N(2))], contains one half of the formula unit. The Pd(2+) ion is located on a twofold rotation axis and is four-coordinated in a slightly distorted square-planar environment by two N atoms of the chelating 2,2'-bipyridine ligand and two iodide ions. The compound displays inter-molecular π-π inter-actions between the pyridine rings of th...

In the title compound, [ZnBr(2)(C(18)H(12)N(2))], the Zn(II) atom is four-coordinated in a distorted tetra-hedral configuration by two N atoms from the 2,2'-biquinoline ligand and two terminal Br atoms. The crystal packing is stabilized by weak inter-molecular C-H⋯Br hydrogen bonds and extensive inter-molecular π-π contacts between the pyridine and benzene rings [centroid-centroid distances = 3...

The Pd(II) ion in the title complex, [PdBr(2)(C(18)H(12)N(2))], is four-coordinated in a distorted square-planar environment by the two N atoms from the chelating 2,2'-biquinoline (Biqu) ligand and two mutually cis Br(-) anions. The Biqu ligand is not planar, the dihedral angle between the quinoline systems being 17.2 (2)°. In the crystal, the complex mol-ecules are connected by C-H⋯Br hydrogen...

some new symmetrical tetraaza schiff base ligands containing 2-quinolinecarboxaldehyde moiety formed from condensation reaction of 2-quinolinecarboxaldehyde and o-phenylenediamine derivatives, such as n, nˊ-bis(2-quinolylmethylidene)-4-methoxy-1, 2-phenylenediimine (l1), n, nˊ-bis(2-quinolylmethylidene)-4-methy-1, 2-phenylenediimine (l2), n, nˊ-bis(2-quinolylmethylidene)-4-chloro-1, 2-phenylene...