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RAS PresidiumВестник Дальневосточного отделения Российской академии наук Vestnik of the Far East Branch of the Russian Academy of Sciences

  • ISSN (Print) 0869-7698
  • ISSN (Online) 3034-5308

Structural chemistry of UOCl complexes with neutral donor ligands (review)

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PII
10.31857/S0869769825030158-1
DOI
10.31857/S0869769825030158
Publication type
Article
Status
Published
Authors
R.L. Davidovich
  • Occupation: Doctor of Sciences in Chemistry, Chief Researcher, Professor
  • Affiliation: Institute of Chemistry, FEB RAS
Volume/ Edition
Volume / Issue number 3
Pages
170-193
Abstract
The crystal structures of UOCl complexes with neutral ligands, containing O, N, S and C donor atoms, studied by single-crystal X-ray diffraction analysis have been systematized and discussed. The crystal chemical features of the structure of mixed-ligand complexes UOClL were determined depending on the ratio of the number of Cl atoms to the number of donor atoms O, N, S and C of coordinated ligands in the compound. In the mixed-ligand complexes UOClL at the ratios 2Cl : O, 2Cl : 3O(N) and Cl : 4O, the coordination polyhedron of the hexavalent uranium atom in the structure has a pentagonal-bipyramidal structure. The oxygen atoms of the uranyl group are located on the vertical axis of the pentagonal bipyramid, perpendicular to the equatorial plane of the polyhedron, in which five atoms of coordinated ligands are located. At the ratio 2Cl : 2O (N, S, C) in mixed-ligand complexes UOClL uranium atoms form tetragonal bipyramidal polyhedra (distorted octahedra) with uranyl groups in the axial vertices, chlorine atoms and donor ligand atoms in the equatorial plane. In a small group of mixed-ligand compounds UOClL with a 2Cl : 4N ratio, hexagonal-bipyramidal polyhedra of U atoms with Cl and N atoms in the equatorial plane and a nonlinear group UO (∠ O(1)=U=O(2) 161.81(11)–168.3(3)°) was established.
Keywords
уранил хлор кислород азот донорный атом структура пентагональная бипирамида тетрагональная бипирамида
Date of publication
15.09.2025
Year of publication
2025
Number of purchasers
0
Views
14

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