Keto and Enol Tautomers of 4-Benzoyl-3-methyl-1-phenyl-5(2H)-pyrazolone

Spectroscopic Studies of the Keto and Enol Tautomers of 1-Phenyl-3-Methyl-4-Benzoyl-5-Pyrazolone

“…Recently, Akama et al (15) have studied the molecular structures of the keto-and enol-PMBP by X-ray analyses and the infrared spectroscopy. Figure 2 gives the IR spectra for the two forms of PMBP.…”

Novel Composite Plastics Containing Silver(I) Acylpyrazolonato Additives Display Potent Antimicrobial Activity by Contact

“…[18] All 15 N data are listed in Tables 1 and 2, and the 15 N CPMAS spectra are reported in Figures 1 (complexes 1-5) and 2 (6)(7)(8)(9)(10)(11)(12). Concerning the HQ Ph and HQ py,CF3 ligands, the X-ray structure of HQ Ph indicates the presence of two independent molecules in the unit cell [20] as confirmed by the splitting of the N2 resonance (253.5 and 251.9 ppm) in the 15 N CPMAS spectrum (Figure 1). 15 N CPMAS spectra of the ligands and 13 C CPMAS spectra of all compounds with chemical shifts are reported in the Supporting Information (Figures S1, S2 and S3, respectively).…”

Synthesis, Crystal Structure, and Biological Study of PtII Complexes with 4‐Acyl‐5‐pyrazolones

“…In complex 1a M , the Pt atom adopts a square-planar coordination geometry, and it is coordinated by two chloride anions in trans position to each other, one S atom of DMSO, and one N atom of the HQ (2) 151(4)°], as already reported for the free HQ Ph ligand. [40] In the crystal packing ( Figure S2), each molecule of complex 1a M forms C-H···π interactions with both phenyl rings. These interactions are established between non-equivalent phenyl rings of different molecules, that is, between the phenyl rings bound to the pyrazolate nitrogen and the phenyl rings bound to the ketone group.…”