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- W2083709670 abstract "The determination of the solvation shell of Hg(II)-containing molecules and especially the interaction between Hg(II) and water molecules is the first requirement to understand the transmembrane passage of Hg into the cell. We report a systematic DFT study by stepwise solvation of HgCl2 including up to 24 water molecules. In order to include pH and salinity effects, the solvation patterns of HgClOH, Hg(OH)2 and HgCl3− were also studied using 24 water molecules. In all cases the hydrogen bond network is crucial to allow orbital-driven interactions between Hg(II) and the water molecules. DFT Born–Oppenheimer molecular dynamics simulations starting from the stable HgCl2–(H2O)24 structure revealed that an HgCl2–(H2O)3 trigonal bipyramid effective solute appears and then the remaining 21 water molecules build a complete first solvation shell, in the form of a water-clathrate. In the HgCl2, HgClOH, Hg(OH)2–(H2O)24 optimized structures Hg also directly interacts with 3 water molecules from an orbital point of view (three Hg–O donor–acceptor type bonds). All the other interactions are through hydrogen bonding. The cluster-derived solvation energies of HgCl2, HgClOH and Hg(OH)2 are estimated to be −34.4, −40.1 and −47.2 kcal mol−1, respectively." @default.
- W2083709670 created "2016-06-24" @default.
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- W2083709670 date "2011-01-01" @default.
- W2083709670 modified "2023-10-17" @default.
- W2083709670 title "Theoretical study of the solvation of HgCl2, HgClOH, Hg(OH)2 and HgCl3−: a density functional theory cluster approach" @default.
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- W2083709670 doi "https://doi.org/10.1039/c1cp22154j" @default.
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