Bond Softening Indices Studied by the Fragility Spectra for Proton Migration in Formamide and Related Structures
| Autor: | Mateusz Jędrzejewski, Piotr Ordon, Ludwik Komorowski, Jarosław Zaklika |
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| Rok vydání: | 2019 |
| Předmět: |
Formamide
010304 chemical physics Hydrogen Proton Dimer chemistry.chemical_element 010402 general chemistry 01 natural sciences Spectral line 0104 chemical sciences chemistry.chemical_compound chemistry 0103 physical sciences Atom Physical chemistry Molecule Physical and Theoretical Chemistry Softening |
| Zdroj: | The Journal of Physical Chemistry A. 124:328-338 |
| ISSN: | 1520-5215 1089-5639 |
| DOI: | 10.1021/acs.jpca.9b09426 |
| Popis: | Computational scheme to obtain bond softening index λ, defined within the conceptual DFT, has been obtained with the use of the reaction fragility (RF) concept. Numerical results were obtained with the RF spectra for the proton transfer reaction in formamide molecule (H2NCHO) and the water assisted proton migration in H2NCHO·H2O complex. Double proton transfer reaction in the formamide dimer, (H2NCHO)2, and its analogues, (H2NCHS)2 and (H2NCHO)·(H2NCHS), have also been studied. The atomic and bond RF spectra clearly describe the density reorganization in the backbone of each molecule, resulting from proton displacement in the systems. The obtained softening indices have been calculated for hydrogen atoms in the reactant state (RS) and product state (PS) configuration. These indices provide fine characteristics for the local sensitivity of the reacting system to a disturbance of the position of a chosen atom. |
| Databáze: | OpenAIRE |
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