Crystal structure of 2,3-bis-(4-methyl-phen-yl)benzo[]quinoxaline.

The title compound, CHN, was obtained during a search for new π-extended ligands with the potential to generate efficient phosphors with iridium(III) for organic light-emitting devices (OLEDs). The benzoquinoxaline ring system is almost planar (r.m.

Photoluminescence properties of a cationic trinuclear zinc(II) complex with the tetradentate Schiff base ligand 6-methyl-2-({[(pyridin-2-yl)methyl]imino}methyl)phenolate.

Metal complexes with Schiff base ligands have been suggested as potential phosphors in electroluminescent devices. In the title complex, tetrakis[6-methyl-2-({[(pyridin-2-yl)methyl]imino}methyl)phenolato-1:2κ(8)N,N',O:O;3:2κ(8)N,N',O:O]trizinc(II) hexafluoridophosphate methanol monosolvate, [Zn3(C14H13N2O)4](PF6)2·CH3OH, the Zn(II) cations adopt both six- and four-coordinate geometries involving the N and O atoms of tetradentate 6-methyl-2-({[(pyridin-2-yl)methyl]imino}methyl)phenolate ligands. Two terminal Zn(II) cations adopt distorted octahedral geometries and the central Zn(II) cation adopts a distorted tetrahedral geometry.

(5-Methyl-pyrazine-2-carboxyl-ato-κ(2) N (1),O)bis-[2-(4-methyl-pyridin-2-yl-κN)-3,5-bis-(tri-fluoro-meth-yl)phenyl-κC (1)]iridium(III) chloro-form hemisolvate.

In the title complex, [Ir(C14H8F6N)2(C6H5N2O2)]·0.5CHCl3, the Ir(III) atom adopts a distorted octa-hedral geometry, being coordinated by three N atoms (arranged meridionally), two C atoms and one O atom of three bidentate ligands. The complex mol-ecules pack with no specific inter-molecular inter-actions between them.

Synthesis and characterization of phenylpyridine-based iridium(III) complex for solution-processed phosphorescent organic light-emitting diode.

A novel main ligand 2-(2,4-dimethoxyphenyl)-5-trifluoromethylpyridine (MeO2CF3ppy) and its complex bis[2-(2,4-dimethoxy-phenyl)-5-trifluoromethyl pyridinato-N,C2]iridium acetylacetonate (MeO2CF3ppy)2Ir(acac) was synthesized. 2,4-Dimethoxy and 5-trifluoromethyl group were incorporated into main ligand to tune luminescence color. The phosphorescence organic light-emitting diodes (PhOLEDs) based on this complex with the configuration of ITO/PEDOT:PSS (40 nm)/PVK:CBP:Ir(III) complex (50 nm)/BCP (20 nm)/LiF (0.

Synthesis of mononuclear copper(II) complexes of acyclic Schiff's base ligands: spectral, structural, electrochemical, antibacterial, DNA binding and cleavage activity.

The mononuclear copper(II) complexes (1&2) of ligands L(1) [N,N'-bis(2-hydroxy-5-methylbenzyl)-1,4-bis(3-iminopropyl)piperazine] or L(2) [N,N'-bis(2-hydroxy-5-bromobenzyl)-1,4-bis(3-iminopropyl) piperazine] have been synthesized and characterised. The single crystal X-ray study had shown that ligands L(1) and L(2) crystallize in a monoclinic crystal system with P21/c space group. The mononuclear copper(II) complexes show one quasireversible cyclic voltammetric response near cathodic region (-0.

Different Zn(II) cation coordination geometries in di-μ-acetato-bis{2-chloro-6-[(pyridine-2-ylmethylimino)methyl]phenol}dizinc(II) chloroform monosolvate.

In the title compound, di-μ-acetato-κ(2)O:O;κ(2)O:O'-bis[(6-chloro-2-{(E)-[(pyridin-2-yl)methylimino]methyl}phenolato-κ(3)N,N',O)zinc(II)], [Zn2(C13H10ClN2O)2(C2H3O2)2]·CHCl3, the Zn(II) cation adopts a five-coordinate geometry and is coordinated by two N atoms and one O atom of a tridentate 6-chloro-2-{(E)-[(pyridin-2-yl)methylimino]methyl}phenolate ligand and two O atoms of two bridging acetate groups, but their coordination geometries differ. One Zn(II) cation adopts a distorted trigonal bipyramidal geometry and the other a square-pyramidal geometry. The two acetate ligands bridge two Zn(II) cations with mono- and bidentate coordination modes.

Bis[2-(1,3-benzo-thia-zol-2-yl)phenyl-κ(2) C (1),N][1,3-bis-(4-bromo-phen-yl)propane-1,3-dionato-κ(2) O,O']iridium(III).

The title complex, [Ir(C15H9Br2O2)(C13H8NS)2], lies about a crystallographic twofold rotation axis passing through the Ir(III) atom and the central C atom of the bis-(bromo-phen-yl)propane-1,3-dionate ligand. The Ir(III) atom adopts a distorted octa-hedral geometry coordinated by two N atoms in the axial positions, and two C and two O atoms in the equatorial plane. The dihedral angle between the two thia-zole ring systems in the complex is 77.

Bis(2-{[(9H-fluoren-2-yl)methyl-idene]amino}-phenolato-κ(2)N,O)zinc methanol disolvate.

In the title compound, [Zn(C(20)H(14)NO)(2)]·2CH(3)OH, the Zn(II) atom lies on a crystallographic twofold rotation axis and is coordinated by two O atoms and two N atoms from two bidentate 2-{[(9H-fluoren-2-yl)methyl-idene]amino}-phenolate ligands within a distorted tetra-hedral geometry. The dihedral angle between the two chelate rings is 82.92 (5)°.

Bis(2-amino-1,3-benzothia-zole-κN)dichloridozinc(II) ethanol hemisolvate.

In the title compound, [ZnCl(2)(C(7)H(6)N(2)S)(2)]·0.5CH(3)CH(2)OH, the Zn(II) atom is coordinated by two N atoms of two 2-amino-benzothia-zole ligands and two Cl atoms within a distorted tetra-hedral geometry. The dihedral angle between the N/Zn/N and Cl/Zn/Cl planes is 86.

Bis[3,5-difluoro-2-(4-methyl-pyridin-2-yl)phenyl-κC,N](picolinato-κN,O)iridium(III) chloro-form monosolvate.

In the title complex, [Ir(C(12)H(8)F(2)N)(2)(C(6)H(4)NO(2))]·CHCl(3), two similar mol-ecules of each component comprise the asymmetric unit. The independent complex mol-ecules are linked by inter-molecular π-π inter-actions [centroid-centroid distance = 3.830 (4) Å].

Bis(3-methyl-pyridinium) tetra-(chlorido/bromido)cuprate(II).

The structure of the title salt, (C(6)H(8)N)(2)[CuCl(3.4)Br(0.6)], consists of two 3-methyl-pyridinium cations and a distorted tetra-hedral [CuCl(3.

Diacetato-(N,N-diethyl-ethylenediamine)-zinc(II).

In the title compound, [Zn(CH(3)COO)(2)(C(6)H(16)N(2))], the Zn(II) atom is coordinated by two N atoms of one bidentate diethyl-ethylenediamine ligand and two O atoms of two acetate anions in a distorted tetra-hedral geometry. The acetate ligands are asymmetrically coordinated to the Zn atom with two different C-O distances of 1.234 (4) and 1.

[Benz-yl(2-pyridyl-methyl-idene)amine]-dichloridomercury(II).

The Hg(II) ion in the title complex, [HgCl(2)(C(13)H(12)N(2))], adopts a distorted tetra-hedral geometry being coordinated by two Cl anions and by two N atoms of the benz-yl(2-pyridyl-methyl-ene)amine ligand. The Cl-Hg-Cl plane is twisted at 70.1 (1)° from the mean plane of the chelate ring.

Dichlorido[N,N-diethyl-N'-(2-pyridyl-methyl-ene)ethane-1,2-diamine]mercury(II).

The Hg atom in the title compound, [HgCl(2)(C(12)H(19)N(3))], adopts a distorted trigonal-bipyramidal geometry, being ligated by two Cl atoms and three N atoms of the N,N-diethyl-N'-(2-pyridylmethyl-ene)ethane-1,2-diamine ligand. The dihedral angle between the HgN(3) and HgCl(2 )least-squares planes is 88.6 (1)°.

Di-μ-chlorido-bis-{[2-(benzyl-imino-meth-yl)pyridine-κN,N']chloridomercury(II)} dichloridomercury(II).

The Hg(II) ion in the title centrosymmetric dinuclear complex, [Hg(2)Cl(4)(C(13)H(12)N(2))(2)]·[HgCl(2)], adopts a distorted square-pyramidal geometry, being coordinated by the bis-chelating N-heterocyclic ligand, two bridging Cl atoms and one terminal Cl atom. One of the bridging Hg-Cl bonds [2.8428 (11) Å] is significantly longer than the other [2.

Bis(3-methyl-pyridinium) tetra-chlorido-cuprate(II).

The title compound, (C(6)H(8)N)(2)[CuCl(4)], is composed of two 3-methyl-pyridinium cation and one tetra-chloridocuprate(II) anion. The geometry around the copper(II) ion is that of a distorted tetra-hedron. In the crystal structure, the anions and cations are linked by three different N-H⋯Cl hydrogen bonds.

Methano-ldinitrato[N-(2-pyridylmethyl-ene)aniline]copper(II).

The Cu atom in the title compound, [Cu(NO(3))(2)(C(12)H(10)N(2))(CH(3)OH)], adopts a square-pyramidal geometry, being ligated by two N atoms of the bidentate N-(2-pyridylmethyl-ene)-aniline (ppma) ligand, two O atoms of NO(3) ligands and one O atom of a methanol molecule, which occupies the apical position. The phenyl ring on the ppma ligand is twisted out of the pyridine plane, forming a dihedral angle of 42.9 (1)°.

Selective complexation of 3d metal(II) ions with multidentate and chiral isomers derived from condensation of 2-pyridinecarboxaldehyde with triethylenetetramine.

Condensation of 2-pyridinecarboxaldehyde with a stoichiometric amount of triethylenetetramine in isopropyl alcohol yields a mixture of at least two products, a Schiff dibase L(1) and a cyclization product with two imidazolidine rings L(2), and possibly a Schiff monobase with one imidazolidine ring L(3). The 3d metal(II) salts, Mn(SCN)(2), MnCl(2), CuBr(2), MnI(2) and ZnBr(2), react selectively with L(1) or L(2) in this mixture solution to produce Mn(L(2))(NCS)(2) 1, Mn(L(2))Cl(2) 2, [Cu(L(2))Br]Br x H(2)O 3, [Mn(L(1))]I(2) 4, and [Zn(L(1))][ZnBr(4)] 5 , respectively. The presence of the two imidazolidine rings in the coordinated ligand L(2) of 1-2 generates two chiral carbon centers.

[Benzyl(2-pyridylmeth-yl)amine]dichloridomercury(II).

The Hg atom in the title compound, [HgCl(2)(C(13)H(14)N(2))], adopts a distorted tetra-hedral geometry, being ligated by two N atoms of the benzyl(2-pyridylmeth-yl)amine (bpma) ligand and two Cl atoms. The dihedral angle between the least-squares planes through the chelate ring and Cl-Hg-Cl atoms is 85.4 (1)°.

[Bis(2-pyridylmeth-yl)amine]dichloridomercury(II).

The Hg atom in the title complex, [HgCl(2)(C(12)H(13)N(3))], adopts a square-pyramidal geometry, being ligated by three N atoms of the tridentate bis-(2-pyridylmeth-yl)amine ligand and two Cl atoms, with one of the latter occupying the apical position. Disorder is noted in the amine portion of the ligand and this was modelled over two sites, with the major component having a site-occupancy factor of 0.794 (14).

Dibromo[(-)-sparteine-kappa2N,N']zinc(II).

In the title compound, dibromo[(6R,7S,8S,14S)-1,3,4,7,7a,8,9,10,11,13,14,14a-dodecahydro-7,14-methano-2H,6H-dipyrido[1,2-a:1',2'-e][1,5]diazocine-kappa(2)N,N']zinc(II), [ZnBr(2)(C(15)H(26)N(2))], the chiral nitrogen-chelating alkaloid (-)-L-sparteine acts as a bidentate ligand, with two bromide ligands occupying the remaining coordination sites, producing a slightly distorted tetrahedral structure. The dihedral angle between the N-Zn-N and Br-Zn-Br planes is 82.4 (1) degrees.