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Journal of Coordination Chemistry Volume 70, 2017 - Issue 12
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Articles

Metal-ligand coordination and antiradical activity of a trichromium(III) complex with the flavonoid naringenin

Anamaria D. P. AlexiouEscola de Engenharia, Universidade Presbiteriana Mackenzie, São Paulo, BrazilCorrespondence[email protected]
,
Carla C. DecandioEscola de Engenharia, Universidade Presbiteriana Mackenzie, São Paulo, Brazil
,
Sabrina da N. AlmeidaEscola de Engenharia, Universidade Presbiteriana Mackenzie, São Paulo, Brazil
,
Marcelo J. P. FerreiraDepartamento de Botânica, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil
,
Paulete RomoffEscola de Engenharia, Universidade Presbiteriana Mackenzie, São Paulo, Brazil
&
Reginaldo C. RochaLos Alamos National Laboratory, Los Alamos, NM, USA
Pages 2148-2160 | Received 12 Nov 2015, Accepted 24 Apr 2017, Published online: 22 May 2017
 
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Abstract

The trinuclear chromium(III) complex [Cr3O(CH3CO2)6(L)(H2O)2] (where L is the monoanion of the flavonoid naringenin) was synthesized and characterized. Density functional theory (DFT) calculations and quantum theory of atoms in molecules (QTAIM) analysis show that the flavonoid binds to CrIII as an O,O-bidentate ligand via the 5-hydroxy and 4-oxo groups. Reactions with 2,2-diphenyl-1-picrylhydrazyl (DPPH) indicate that the antiradical activity of this flavonoid-metal complex is enhanced in comparison with uncoordinated naringenin.

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