RESUMEN
[This corrects the article DOI: 10.1107/S2414314617002346.].
RESUMEN
The whole mol-ecule of the title compound, C14H14N4, is generated by twofold rotation symmetry. The twofold axis bis-ects the central -CH2-CH2- bond and the planes of the pyridine rings are inclined to one another by 65.60â (7)°. In the crystal, there are no significant inter-molecular inter-actions present.
RESUMEN
The title compound, C13H13N2O3, a hydantoin derivative, crystallized with two mol-ecules (A and B) in an asymmetric unit. In mol-ecule A, the imidazolidine ring is twisted about the C-N bond involving the spiro C atom, while in mol-ecule B this ring is flat (r.m.s. deviation = 0.010â Å). The pyran rings in both mol-ecules have distorted half-chair conformations. The mean plane of the imidazolidine ring is inclined to the aromatic ring of the chroman unit by 79.71â (11)° in mol-ecule A and 82.83â (12)° in mol-ecule B. In the crystal, pairs of N-Hâ¯O hydrogen bonds link the individual mol-ecules to form A-A and B-B inversion dimers. The dimers are linked via N-Hâ¯O and C-Hâ¯O hydrogen bonds, forming sheets lying parallel to the bc plane, viz. (011). Within the sheets, the A and B mol-ecules are linked by C-Hâ¯π inter-actions.
RESUMEN
In the title compound, C15H15N3S2, the central pyrazole ring adopts a twisted conformation on the -CH-CH2- bond. Its mean plane makes dihedral angles of 7.19â (12) and 71.13â (11)° with those of the thio-phene and toluene rings, respectively. The carbothi-amide group [C(=S)-N] is inclined to the pyrazole ring mean plane by 16.8â (2)°. In the crystal, mol-ecules are linked by N-Hâ¯S hydrogen bonds, forming chains propagating along [010]. Within the chains, there are N-Hâ¯π inter-actions present. Between the chains there are weak parallel slipped π-π inter-actions involving inversion-related thio-phene and pyrazole rings [inter-centroid distance = 3.7516â (14)â Å; inter-planar distance = 3.5987â (10)â Å; slippage = 1.06â Å].
RESUMEN
Two new neutral mixed-ligand cobalt(II) complexes, [CoCl2(dmdphphen)] 1 and [Co(NCS)2(dmdphphen)] 2, where dmdphphen is 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline, were synthesized and characterized by an elemental analysis, UV-Vis, IR, TG/DTA, cyclic voltammetry CV, and single X-ray diffraction. Complex 2 crystallized as monoclinic with a space group P21/c. Co(II) ions are located in a distorted tetrahedral environment. TG/DTA result shows that these complexes are very stable and decomposed through one-step reaction. The two complexes exhibit a quasireversible one-electron response at -550 and 580 mV versus Cp2Fe/Cp2Fe(+), which has been assigned to Co(I)/Co(II) and Co(II)/Co(III) couples. Absorption spectral studies reveal that such complexes exhibit hypochromicity during their interaction with CT-DNA.