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Relativistic Density Functional Study of the Dinuclear Uranyl Complex [(UO 2 ) 2 (μ 2 ‐OH) 2 Cl 2 (H 2 O) 4 ] in Its Crystalline Environment
Author(s) -
Schlosser Florian,
Krüger Sven,
Rösch Notker
Publication year - 2003
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200300024
Subject(s) - chemistry , uranyl , hydrogen bond , crystal structure , density functional theory , crystallography , bond length , relativistic quantum chemistry , ion , hydrogen , uranium , crystal (programming language) , computational chemistry , inorganic chemistry , molecule , atomic physics , organic chemistry , physics , computer science , programming language , materials science , metallurgy
The hexavalent dinuclear uranyl dichloride complex [(UO 2 ) 2 (μ 2 ‐OH) 2 Cl 2 (H 2 O) 4 ] was studied computationally with an all‐electron scalar relativistic density functional method. This suggested hydrolysis product of uranyl in the presence of chlorine ions is one of the few polynuclear uranyl species for which a crystal structure is known. The calculated gas‐phase structure is similar to the experimental crystal geometry; any major deviations are due to hydrogen bonds in the crystal. If the eight strongest hydrogen bonds are included in a model of the complex’s crystalline environment, the calculated structure improves significantly. Based on this model, the hydrogen bond lengths and angles were determined, indicating that they are moderate and strong with an average binding energy of 39 kJ/mol. These computational results corroborate earlier suggestions based on experimental results concerning the location and strength of the hydrogen bonds. In addition, a valuable reference for relativistic quantum chemical methods is provided by the gas‐phase results. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)