Stress tensor eigenvector following with next-generation quantum theory of atoms in molecules |
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Authors: | Jia Hui Li Wei Jie Huang Tianlv Xu Steven R. Kirk Samantha Jenkins |
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Affiliation: | Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research and Key Laboratory of Resource Fine-Processing and Advanced Materials of Hunan Province of MOE, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan, China |
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Abstract: | The eigenvectors of the electronic stress tensor have been identified as useful for the prediction of chemical reactivity because they determine the most preferred directions to move the bonds. A new 3–D vector based interpretation of the chemical bond that we refer to as the bond-path framework set B provides a version of the quantum theory of atoms in molecules (QTAIM) beyond the minimum definition for bonding that is particularly suitable for understanding changes in molecular electronic structure that occur during reactions. We demonstrate that the most preferred direction for bond motion using the stress tensor corresponds to the most compressible direction and not to the least compressible direction as previously reported. We show the necessity for a directional approach constructed using the eigenvectors along the entire bond-length and demonstrate the insufficiency of scalar measures for capturing the nature of the stress tensor within the QTAIM partitioning. |
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Keywords: | bond-path framework set QTAIM stress tensor torsion |
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