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• W3182671324 endingPage "4196" @default.
• W3182671324 startingPage "4196" @default.
• W3182671324 abstract "Resonance-assisted hydrogen bonds (RAHB) are intramolecular contacts that are characterised by being particularly energetic. This fact is often attributed to the delocalisation of π electrons in the system. In the present article, we assess this thesis via the examination of the effect of electron-withdrawing and electron-donating groups, namely −F, −Cl, −Br, −CF3, −N(CH3)2, −OCH3, −NHCOCH3 on the strength of the RAHB in malondialdehyde by using the Quantum Theory of Atoms in Molecules (QTAIM) and the Interacting Quantum Atoms (IQA) analyses. We show that the influence of the investigated substituents on the strength of the investigated RAHBs depends largely on its position within the π skeleton. We also examine the relationship between the formation energy of the RAHB and the hydrogen bond interaction energy as defined by the IQA method of wave function analysis. We demonstrate that these substituents can have different effects on the formation and interaction energies, casting doubts regarding the use of different parameters as indicators of the RAHB formation energies. Finally, we also demonstrate how the energy density can offer an estimation of the IQA interaction energy, and therefore of the HB strength, at a reduced computational cost for these important interactions. We expected that the results reported herein will provide a valuable understanding in the assessment of the energetics of RAHB and other intramolecular interactions." @default.
• W3182671324 created "2021-07-19" @default.
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• W3182671324 date "2021-07-10" @default.
• W3182671324 modified "2023-10-02" @default.
• W3182671324 title "On the Relationship between Hydrogen Bond Strength and the Formation Energy in Resonance-Assisted Hydrogen Bonds" @default.
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• W3182671324 doi "https://doi.org/10.3390/molecules26144196" @default.
• W3182671324 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8303970" @default.
• W3182671324 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34299473" @default.
• W3182671324 hasPublicationYear "2021" @default.
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