In the crystal of the title compound, C(15)H(11)ClN(2)O, the molecules are linked by C-H⋯O and weak C-H⋯π inter-actions. The chloro-phenyl and phenyl rings are twisted with respect to the central pyrazolone ring, making dihedral angles of 18.23 (8) and 8.35 (8)°, respectively. The N-N and C=O bond lengths are comparable to those reported for pyrazolone compounds.

In the title compound, C(20)H(19)N(5)O(3)S·H(2)O, the pyrazole ring is connected to a pyrazolone ring, and the two five-membered rings are aligned at 45.0 (1)°. The pyrazole ring is connected to a phenyl ring and the two are twisted by 42.7 (1)°. Finally, the pyrazolone ring is connected to a benzene ring and the two are twisted by 19.5 (1)°. The N-H and -NH(2) portions and the solvent water mo...

The preparation of Lanthanon octa-coordinated mixed chelates with different types of ligands is uncommon. Thompson and Loraas [1] have shown the presence of octacoordinated mixed chelates in solution. Recently, Dutt and Sur [2] have actually isolated several mixed tetrakis compounds of La, Pr, Nd, and Sm with three acetylacetone (Acac) molecules, the other ligands being propionylacetone or benz...

The title compound, C(21)H(23)N(3)O(4), adopts an E configuration about the central C=N double bond and the pyrazolone ring is almost planar, with a maximum deviation of 0.042 (1) Å. The central pyrazolone ring makes dihedral angles of 51.96 (5) and 3.82 (5)° with the attached phenyl and the trimeth-oxy-substituted benzene rings, respectively. The dihedral angle between the phenyl ring and the ...

We demonstrate a new strategy for designing reversibility, fatigue resistance and fluorescence switching materials, which are based on pyrazolone derivatives by introducing a pyridine ring. The reversible "on" and "off" modulation of fluorescence emission was up to 95% in the solid state.

Highly optically pure multisubstituted dihydropyrano[2,3-c]pyrazol-6-(1H)-ones were synthesized via the N-heterocyclic carbene-catalyzed enantioselective [4 + 2] annulation of α-chloroaldehydes and pyrazolone-derived oxodienes.

In the title compound, C(25)H(23)N(3)O(2), the dihedral angles formed by the pyrazolone ring with the three aromatic rings are 14.59 (7), 79.35 (5) and 87.10 (6)°. Three intra-molecular C-H⋯O, C-H⋯N and N-H⋯O hydrogen-bond inter-actions are present. The crystal structure is stabilized by two weak inter-molecular C-H⋯O and C-H⋯N hydrogen-bond inter-actions.

We aimed to synthesize the phenylhydrazone derivative of 4benzoyl-3-methyl-1-phenyl-5-pyrazolone which is a novel Schiff base. The ligand was synthesized in three stages. 3-methyl-1-phenyl-5-pyrazolone was synthesized as reported in the literature. (Ref. Vogel). This was benzoylated at the 4position to get 4benzoyl-3-methyl-1phenyl-5-pyrazolone (ref. Jesen’s procedure). This was condensed with ...

In the title compound, C(25)H(22)N(4)O(4), the central benzene ring, makes dihedral angles of 74.35 (6), 17.01 (8) and 62.19 (7)°, respectively, with the nitro-benzyl ring, the pyrazolone ring and the terminal phenyl ring. Inter-molecular C-H⋯O hydrogen bonds help to consolidate the crystal packing.

The adsorption of pyrazolone(HPMSP), Calix[4]-arene,Cu and Cs, on carbon nanotube(CNT) atroom temperature has been investigated using spectroscopy.Uv spectroscopy indicated that pyrazolone molecules adsorbed on carbon nanotube at roomtemperature in compared calix[4]- arene molecules adsorbed approximately same.The amount ofpyrazolone(HPMSP) adsorb 3.8. le mol/g and amount calix[4]-arene adsorbe...