Related Experiment Video
Updated: Apr 15, 2026

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
A trinuclear oxo-chromium(III) complex containing the natural flavonoid primuletin: synthesis, characterization, and
Anamaria D P Alexiou1, Carla C Decandio2, Sabrina da N Almeida3
1Escola de Engenharia, Universidade Presbiteriana Mackenzie, Rua da Consolação 930, São Paulo, SP CEP 01302-000, Brazil. anamaria.alexiou@mackenzie.br.
Abstract:
A new trinuclear oxo-centered chromium(III) complex with formula [Cr3O(CH3CO2)6(L)(H2O)2] (L = 5-hydroxyflavone, known as primuletin) was synthetized and characterized by ESI mass spectrometry, thermogravimetry, and 1H-NMR, UV-Vis, and FTIR spectroscopies. In agreement with the experimental results, DFT calculations indicated that the flavonoid ligand is coordinated to one of the three Cr(III) centers in an O,O-bidentate mode through the 5-hydroxy/4-keto groups. In a comparative study involving the uncoordinated primuletin and its corresponding complex, systematic reactions with the free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) showed that antiradical activity increases upon complexation.
More Related Videos
07:12Synthesis and Evaluation of a Ruthenium-based Mitochondrial Calcium Uptake Inhibitor
Published on: October 26, 2017
09:45Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
Published on: March 20, 2017
Related Concept Videos
Oxidation of Phenols to Quinones
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
Radical Autoxidation
Oxidation of Alcohols
The process of oxidation in a chemical reaction is observed in any of the three forms:
Electron Transport Chain: Complex III and IV
Redox Titration: Other Oxidizing and Reducing Agents
Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals