Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 156, Issue 23, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0091681
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This article calculates the probabilities of finding a chosen number of electrons in flexible domains of space using highly correlated wave functions. Quantum mechanics can increase the probabilities of chemically relevant electron arrangements in these regions. However, the probability of having a specific arrangement, such as chemical formulas (bonds or atoms), is often low despite being maximal. It is useful to consider alternative distributions of electrons and to include exchanges of electrons between different types of regions.
Probabilities to find a chosen number of electrons in flexible domains of space are calculated for highly correlated wave functions. Quantum mechanics can produce higher probabilities for chemically relevant arrangements of electrons in these regions. However, the probability to have a given arrangement, e.g., that corresponding to chemical formulas (bonds or atoms), is low although being often maximal. Like in valence bond theory, it is useful to consider alternative distributions of electrons. Exchanges of electrons should be considered not only between atoms but also between other types of regions, such as those attributed to lone pairs. It is useful to have definitions flexible enough to allow users to find the most relevant representations. We tentatively suggest a tool (the effective number of parties) to help one make the choice. Published under an exclusive license by AIP Publishing.
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