Crystal Structure of Regularly Th‐Symmetric [U(NO3)6]2− Salts with Hydrogen Bond Polymers of Diamide Building Blocks. Issue 1 (5th December 2018)

• Record Type: Journal Article
• Authors: Takao, Koichiro; Kazama, Hiroyuki; Ikeda, Yasuhisa; Tsushima, Satoru
• Is Part Of: Angewandte Chemie international edition. Volume 58:Issue 1(2018)
• Page Start: 240
• Page End: 243
• Publication Date: 2018-12-05
• Subjects: f–f transitions -- hexanitrato uranate(IV) -- hydrogen bonds -- structure elucidation -- symmetry; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201811731
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Hexanitratouranate(IV), [U(NO3 )6 ] 2−, has been crystallized with anhydrous H + ‐involving hydrogen bond polymers connected by selected diamide building blocks. Thanks to the significant moderation of electrostatic interactions between the anions and cations, the molecular structure of [U(NO3 )6 ] 2− in these compounds is regularly Th ‐symmetric. The f–f transitions stemming from 5f 2 configuration of U 4+ are strictly forbidden by the Laporte selection rule in such a centrosymmetric system, so that the obtained compounds are nearly colourless in contrast to other U IV species usually coloured in green. Abstract : Non‐green U IV : Hexanitratouranate(IV), [U(NO3 )6 ] 2−, deposits as pale‐coloured crystalline salts with anhydrous H + ‐involving hydrogen bond polymers connected by selected diamide building blocks.