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• W3014735849 abstract "The elucidation of the complexation of lapachol and its derivatives to Fe 2+ cation has been done using the density functional theory (DFT). This complexation has been limited to bidentate and tridentate to Fe 2+ cation. Geometry optimizations have been implemented in gas and solution phase (water, acetonitrile, chlorobenzene, benzene, and toluene) for ligands at B3LYP/6-311++G (d,p) level of theory using B3LYP/6-31+G(d,p) optimized data as starting point. But, the geometrical optimizations in solution phase of the 22 complexes analyzed of lapachol and its derivatives to Fe 2+ cation were restricted to acetonitrile and benzene. The complexation energy and the metal ion affinity (MIA) have also been calculated using the B3LYP method. The results obtained indicated a proportionality between the MIA values and the retained charge on Fe 2+ cation for k 2 -(O 1 ,O 2 ) modes. But, an inverse proportionality has been yielded between these two parameters for k 3 -(O 2 , C=C) tridentate modes. For k 3 -(O 3 ,C=C) tridentate mode coordination, the higher stability has been obtained. In this latter tridentate coordination in gas phase, the topological analysis of complexes exhibits the fact that the electron density is concentrated between the O 3 oxygen atom of the ligand attached to Fe 2+ and this metal cation. Moreover, the hydrogen bond strength calculated for isolated ligands (situated between 23.92 and 30.15 kJ/mol) is in the range of normal HBs. Collectively, all the complexation processes have shown to be highly exothermic. Our results have also shown that the electron extraction from Fe 2+ ...La i complexes is more difficult compared to that from free ligands." @default.
• W3014735849 created "2020-04-10" @default.
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• W3014735849 date "2020-03-31" @default.
• W3014735849 modified "2023-10-18" @default.
• W3014735849 title "Antioxidant Properties of Lapachol and Its Derivatives and Their Ability to Chelate Iron (II) Cation: DFT and QTAIM Studies" @default.
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• W3014735849 doi "https://doi.org/10.1155/2020/2103239" @default.
• W3014735849 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7150675" @default.
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