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- W4313279962 abstract "Modern Density Functional Theory models are now suitable for many molecular and condensed phase studies. The study of noncovalent interactions, a well-known drawback, is no longer an insurmountable obstacle through design and empirical corrections. However, using empirical corrections as in the DFT-D methods might not be an all-in-one solution. This work uses a simple system, X2 -H2 O with X = Cl or Br, with two different interactions, halogen-bonded (XB) and hydrogen-halogen (HX), to investigate the capability of current density functional approximations (DFA) in predicting interaction energies with eight different exchange-correlation functionals. SAPT(DFT) provides, for all the studied cases, better predictions than the widely used supermolecular approach. In addition, the components of the interaction energy suggest where some of the shortcomings originate in each DFA. The analysis of the functionals used confirms that PBE0 and ω-B97X-D have a physically correct behavior. Using SAPT(DFT) and PBE0, and ω-B97X-D, we obtained the interaction energy of Cl2 and Br2 inside different clathrate cages and satisfactorily compared with wavefunction results; hence, the lower and upper limits of this value are defined: Cl2 @512 , -5.3 ± 0.3 kcal/mol; Cl2 @512 62 , -5.5 ± 0.1 kcal/mol; Br2 @512 62 , -7.6 ± 1.0 kcal/mol; Br2 @512 63 , -10.6 ± 1.0 kcal/mol; Br2 @512 64 , -10.9 ± 0.8 kcal/mol." @default.
- W4313279962 created "2023-01-06" @default.
- W4313279962 creator A5035024578 @default.
- W4313279962 creator A5080213948 @default.
- W4313279962 date "2022-12-28" @default.
- W4313279962 modified "2023-09-25" @default.
- W4313279962 title "Interaction energy of Cl<sub>2</sub> and Br<sub>2</sub> with <scp>H<sub>2</sub>O</scp>: Exchange, dispersion and density the crucial ingredients" @default.
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- W4313279962 doi "https://doi.org/10.1002/jcc.27066" @default.
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