The stability of covalent dative bond significantly increases with increasing solvent polarity

0556979 - ÚOCHB 2023 RIV GB eng J - Journal Article
Lo, Rabindranath - Manna, Debashree - Lamanec, Maximilián - Dračínský, Martin - Bouř, Petr - Wu, Tao - Bastien, Guillaume - Kaleta, Jiří - Miriyala, Vijay Madhav - Špirko, Vladimír - Mašínová, Anna - Nachtigallová, Dana - Hobza, Pavel
The stability of covalent dative bond significantly increases with increasing solvent polarity.
Nature Communications. Roč. 13, č. 1 (2022), č. článku 2107. E-ISSN 2041-1723
R&D Projects: GA ČR(CZ) GX19-27454X; GA ČR(CZ) GA20-10144S; GA ČR(CZ) GA20-13745S; GA ČR(CZ) GA22-15374S
Institutional support: RVO:61388963
Keywords : analyzing vibrational-spectra * charge-transfer * complexes
OECD category: Physical chemistry
Impact factor: 16.6, year: 2022
Method of publishing: Open access
https://doi.org/10.1038/s41467-022-29806-3

It is generally expected that a solvent has only marginal effect on the stability of a covalent bond. In this work, we present a combined computational and experimental study showing a surprising stabilization of the covalent/dative bond in Me3NBH3 complex with increasing solvent polarity. The results show that for a given complex, its stability correlates with the strength of the bond. Notably, the trends in calculated changes of binding (free) energies, observed with increasing solvent polarity, match the differences in the solvation energies (ΔEsolv) of the complex and isolated fragments. Furthermore, the studies performed on the set of the dative complexes, with different atoms involved in the bond, show a linear correlation between the changes of binding free energies and ΔEsolv. The observed data indicate that the ionic part of the combined ionic-covalent character of the bond is responsible for the stabilizing effects of solvents.
Permanent Link: http://hdl.handle.net/11104/0331103