Issue 6, 2018

Crystal structures of uranyl complexes with isobutyrate and isovalerate anions

Abstract

Single crystals of Na[(UO2)(i-C3H7COO)3]·0.7H2O (I), Cs[(UO2)(i-C3H7COO)3] (II) and (NH4)[(UO2)(i-C4H9COO)3] (III) were obtained via isothermal evaporation and their structures were solved using X-ray diffraction techniques. Even though the ligands are branched, bulky and spatial, many carbon and hydrogen atoms are still disordered in these crystal structures at low temperature. A new type of Na coordination is observed for the first time for this family of compounds, proposing high sensitivity of compound I to humidity. Depolymerization of the metal–oxygen frameworks for the new compounds is compared with the known ones. Coordination sequences of sodium/cesium and uranyl complexes with aliphatic monocarboxylate ions are calculated to show different crystal-chemical function of crystallographically independent atoms. As there are analogous compounds to the title ones with straight-chain ligands, such groups of similar compounds with single varying parameters are very advantageous for establishing correlations between composition and crystal structure.

Graphical abstract: Crystal structures of uranyl complexes with isobutyrate and isovalerate anions

Supplementary files

Article information

Article type
Paper
Submitted
27 Oct 2017
Accepted
25 Dec 2017
First published
16 Jan 2018
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2018,47, 1849-1856

Crystal structures of uranyl complexes with isobutyrate and isovalerate anions

A. V. Savchenkov, A. V. Vologzhanina, A. O. Dmitrienko, Y. V. Zubavichus, D. V. Pushkin, L. B. Serezhkina and V. N. Serezhkin, Dalton Trans., 2018, 47, 1849 DOI: 10.1039/C7DT04042C

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