Uranyl Complexes with Hydroxybenzoates: Stability, Structure, and Effects of Hydroxyl Groups Quantity and Position.

Authors

Olga I Logacheva, Daniil N Yarullin, Ilya S Roshchin, Elena A Gushchina, Viktor V Aleksandriiskii, Grigoriy A Zhurko, Aleksei R Abdulmyanov, Anna V Vologzhanina, Pavel V Dorovatovskii, Maksim N Zavalishin, George A Gamov

Published in

Inorganic chemistry. Jun 29, 2026. Epub Jun 29, 2026.

Abstract

This paper reports stability constants for complexes formed between uranyl ions and benzoate, as well as 12 anions of various hydroxybenzoates, determined at T = 298.2 K, p = 0.1 MPa, and ionic strength I = 0.05 M (NaClO₄). The relationship between the protolytic properties of the corresponding acids and complex stability is established through analysis of both our experimental data and literature values. A simple incremental approach quantifies the contribution of hydroxyl groups in ortho-, meta-, and para-positions to the stability constants. ¹³C NMR spectroscopy was employed to identify the functional groups of hydroxybenzoates participating in complexation. Additionally, the crystal structure of [UO₂(2,6-DHBA)₂(H₂O)₂]·1.5H₂O was refined using X-ray diffraction analysis.

PMID:
42366786
Bibliographic data and abstract were imported from PubMed on 29 Jun 2026.

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