title: A QM/MM study on the aqueous solvation of the tetrahydroxouranylate [UO2(OH)4]2- complex ion.
abstract: We report a QM augmented QM/MM study on the coordination of the tetrahydroxouranylate ion in aqueous solution. QM/MM geometry optimizations followed by full QM single-point calculations on the optimized structures show that a hexa-coordinated structure is more stable than the hepta-coordinated structure by 43 kJ/mol. Charge transfer of the tetrahydroxouranylate to the solvating water molecules is relatively modest, and can be modeled by including a solvation layer consisting of 12 explicit water molecules.
authors.affiliation: Section Theoretical Chemistry, Faculty of Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands.
authors.forename: Ivan
authors.initials: I
authors.lastname: Infante
authors.forename: Bas
authors.initials: B
authors.lastname: van Stralen
authors.forename: Lucas
authors.initials: L
authors.lastname: Visscher