Sema Öztürk

Triboluminescence and crystal structures of non-ionic europium complexes

The triboluminescence of three non-ionic europium complexes, Eu(TTA)3·bipy (1), Eu(TTA)3·dia (2) and Eu(DBM)3·dmbp·H2O (3) (TTA = 2-thenoyltrifluoroacetonate, DBM = dibenzoylmethanate, bipy = 2,2′-bipyridine, dia = 4,5-diazafluoren-9-one, dmbp = 4,4′-dimethyl-2,2′-bipyridinate), was observed. Structure determinations of 1 and 3 were carried out. The triboluminescence maxima of 1 and 2 are similar to those of their photoluminescence. The disorder of the thienyl ring and CF3 groups in 1 and the disorder of water in the packing of 3 may be responsible for their triboluminescent activity.

l-Histidinium tetra­fluoro­succinate

In the crystal structure of the title compound, C6H11N3O22+·C4F4O42−, the anions and cations are linked to each other through hydrogen bonds.

Structure of 4,4′-butane-(1,4,7-three-p-tolylsulphonyl-1,4,7-three amine) diphthalonitrile

Abstract The crystal structure of the title compound, C41 H35 N7 O6 S3 was determined as monoclinic by single crystal X-Ray diffraction technique. The molecular structure was identified by IR, 1H-NMR, 13C-NMR and elemental analysis. The crystal parameters of this compound are as follows: monoclinic P 2 1/n, a = 12.694(2) Å, b = 26.204(2) Å, c = 13.005(2) Å, β = 102.95(2)°, V = 4216.02(1) Å.3, Z = 4, Dx = 1.289 g/cm3, F(000) = 1704, λ (MoKα) = 0.71070 Å, μ = 0.2 mm−1. The structure was solved by SHELXS-97 and refined by SHELXL-97. R = 0.06 for 3178 observed reflections with I > 2σ (I).

Methyl (+/-)-1-ethyl-2-hydroxy-4-(4-methoxybenzoyl)-5-(4-methoxyphenyl)-3-oxo-2,3-dihydro-1H-pyrrole-2-acetate.

The title compound, C(24)H(25)NO(7), is a racemic mixture of 2,3-dihydro-1H-pyrrol-3-ones. It crystallizes in the triclinic system, space group P1, with Z = 2. The asymmetric unit contains two enantiomorphic molecules and the structure is stabilized by hydrogen-bond contacts.

5-Benzoyl-1-ethyl-4-phenyl-1H-pyrimidin-2-one

In the title compound, C 19 H 16 N 2 O 2 , the pyrimidine ring is distorted from planarity. The dihedral angle between the two phenyl rings is 88.3 (1)°. The two phenyl rings form dihedral angles of 114.6(1) and 141.2(1)° with the pyrimidine ring.

Structural Investigation of bis(4-Methyl-1-piperazineglyoximato)dipyridinato Cobalt(III) Chloro Dinitrate Trihydrate

The crystal and molecular structure of the title compound, C24H36CoN10O4·2(NO3)·3(H2O)·Cl, have been determined by X-ray analysis: Cc (No: 9), a = 17.6920(4) Å, b = 11.8163(2) Å, c = 16.4752(4) Å, ß = 91.679(1)°, Z = 4. The Co(III) ion is six-coordinated with octahedral geometry, the pyridine rings are planar and the piperazine rings assume chair conformations.

5-Benzyl-4-phenyl-2,4-di­hydro-1,2,4-triazole-3-thione

As part of structural studies of 1,2,4-triazole derivatives, the crystal structure of the title compound, C15H13N3S, has been investigated. The structure shows a V-shape in the molecular skeleton, as found for similar compounds. The crystal structure is stabilized by an N—H⋯S and three C—H⋯π intermolecular interactions.

The Crystal and Molecular Structure of 11,12-dibromo- 7,8—benzo-1,5-di(p—tolylsulphonyl)-1,5-diazacyclononan

The crystal structure of the title compound, C 25 H 26 Br 2 N 2 O 4 S 2 was determined by single crystal X-ray diffraction technique. The crystals are monoclinic, space group C 2/c, with a=20.7142(2) A b=11.7910(2) A, c=10.6735(3) A, β=98.549(2)°, V=2577.94(9) A 3 , Z=4. The structure was solved by direct methods and refined by least-squares methods to a final R=0.046 for 1866 observed reflections with I>2σ(I). The title compound, displays disordered geometry around the Cl atom located almost on twofold axis. The nine-membered heterocylic ring is close to the half-chair conformation. The dihedral angle between phenyl rings is 34.2(1)°.

5′-Allyl-2′-benzoyloxy-3′-methoxy-4-nitroazobenzene

The structure of the title compound, 4-allyl-2-methoxy-6-[(4-nitrophenyl)diazenyl]phenyl benzoate, C23H19N3O5, displays the characteristic features of azobenzene derivatives. The azobenzene moiety of the molecule has a trans configuration and in this moiety, average C—N and N=N bond lengths are 1.441 (3) and 1.241 (3) A, respectively.

1-(4-Benzylpiperidin-1-yl)glyoxal dioxime

The title compound, C 14 H 19 N 3 O 2 , contains two independent molecules in the asymmetric unit. The piperidine rings assume chair conformations. The dihedral angle between the piperidine and benzyl ring planes is 86.6(1)° in molecule A and 77.2(1)° in molecule B. Both O-H…O and O-H… N intermolecular hydrogen bonds are present.