Li, Xiao-jing published the artcileCu(II) and Zn(II) complexes with an acylhydrazone derived from 4-methyl salicylic hydrazide and PMBP: crystal structures and fluorescence properties of Zn(II) complex, Name: 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, the publication is Wuji Huaxue Xuebao (2015), 31(8), 1661-1666, database is CAplus.
Two complexes [(Cu)(L)(Cl)]·0.5EtOH·1.5H2O and {[Zn(L)(NO3)]·2CH3CN}n (HL was the acylhydrazone ligand derived from 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) and 4-Me salicylic hydrazide) had been synthesized and characterized by single-crystal X-ray diffraction, elemental anal. and IR spectroscopy. X-ray diffraction anal. results showed that the coordination geometry of the Cu(II) ion in 1 was a distorted square planar geometry with nitrogen and two oxygen atoms provided by the enolizated ligand L-1 and one chloride anion. However, in complex 2, the Zn(II) ion with a distorted trigonal biyramid coordination geometry was five-coordinated, involving one nitrate anion, one NO2 donor set of an enolizated ligand L– and one pyrazoline nitrogen atom from another adjacent acylhydrazone ligand, thus forming one dimension chain-like framework along b axis. When excited at 310 nm, complex 2 exhibited two strong emissions at 434 and 459 nm, while the ligand showed relatively weak emission at 521 nm. In addition, luminescent decay data showed that the mean lifetime (τ) were 7.3528 and 7.7556 μs for HL and complex 2, resp. CCDC: 1058420, HL·0.5EtOH; 1058421, 1; 1058422, 2.
Wuji Huaxue Xuebao published new progress about 4551-69-3. 4551-69-3 belongs to pyrazoles-derivatives, auxiliary class Benzenes, name is 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, and the molecular formula is C17H14N2O2, Name: 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one.
Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics