The Metal Complexes of Heterocyclic β-Diketones and their Derivatives, Part VIII Synthesis, Structure, Proton NMR and Infrared Spectral Studies of the Complexes of Al(III), Fe(III), Co(III), Rh(III), In(III), and Zr(IV) with l-Phenyl-3-methyl-4-trifluoroacetyl-pyrazolone-5 (HPMTFP)
Year: 1981
Type: article
Abstract: New complexes of Al(III), Fe(III), Co(III), Rh(III), In(III) and Zr(IV) with 1-phenyl- 3-methyl-4-trifluoroacetyl-pyrazolone-5, (HPMTFP), have been synthesized and characterized by means of elemental analyses, conductivity and magnetic moment measurements, proton NMR and infrared spectroscopy. It is concluded that the ligand, HPMTFP, reacts as a bidentate enol forming neutral metal chelates. The PMR spectra of chelates sufficiently soluble in deuterated NMR solvents were recorded and studied. The IR spectra are measured between 4000-200 cm-1 and assignments are proposed for the observed frequencies. The M-O stretching frequency follows the order: AI > Rh > Fe = Co = Zr > In.
Source: Zeitschrift für Naturforschung B
Author: Emmanuel Chukwuemeka Okafor
Institution: University of Nigeria
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,712
OpenAlex ID: W2000877463