Abstract
In this work the nature of the three-center two-electron (3c2e) chemical bonds in the diborane (6) molecule and the octahydrotriborate anion (B3H8−) is investigated by the Generalized Product Function Energy Partitioning (GPF-EP) method using modern valence bond wave functions. The Interference Energy Analysis shows that 3c2e bonds have the same features of a 2c2e bond: interference dominates the energetic balance for the formation of the bond and the kinetic energy drop is responsible for its stabilization. Also, 3c2e are generally way more energetic than a 2c2e analogous one, because interference can occur in three different ways (multiple interference effect), rather than just in one as for the two-center bonds. Furthermore, with the GPF-EP method one could establish a more rigorous way for discussing the idea of a “supported” bond in the diborane (6) molecule.
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Acknowledgements
The authors acknowledge Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) (Grant No. 305656/2014-7), Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ) (Grant No. E-26/202.939/2017) for financial support, and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) (Grant No. Finance Code 001) for the PhD scholarship.
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This study was financed in part by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001.
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de Sousa, D.W.O., Nascimento, M.A.C. Three-center two-electron bonds in the boranes B2H6 and B3H8− from the quantum interference perspective. Theor Chem Acc 139, 140 (2020). https://doi.org/10.1007/s00214-020-02654-4
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DOI: https://doi.org/10.1007/s00214-020-02654-4